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Bruce A. Mah 0c234af8b9 Commit the 4.6.2 release documentation to the Web site. 
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2002-08-14 15:34:38 +00:00

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<div class="TITLEPAGE">
<h1 class="TITLE"><a name="AEN2">FreeBSD/i386 4.6.2-RELEASE
Release Notes</a></h1>
<h3 class="CORPAUTHOR">The FreeBSD Project</h3>
<p class="COPYRIGHT">Copyright &copy; 2000, 2001, 2002 by
The FreeBSD Documentation Project</p>
<p class="PUBDATE">$FreeBSD:
src/release/doc/en_US.ISO8859-1/relnotes/common/new.sgml,v
1.22.2.249.2.13 2002/08/13 21:38:44 bmah Exp $<br>
</p>
<div>
<div class="ABSTRACT">
<a name="AEN11"></a>
<p>The release notes for FreeBSD 4.6.2-RELEASE contain
a summary of the changes made to the FreeBSD base
system since 4.5-RELEASE. Both changes for kernel and
userland are listed, as well as applicable security
advisories for the base system that were issued since
the last release. Some brief remarks on upgrading are
also presented.</p>
</div>
</div>
<hr>
</div>
<div class="TOC">
<dl>
<dt><b>Table of Contents</b></dt>
<dt>1 <a href="#AEN13">Introduction</a></dt>
<dt>2 <a href="#AEN23">What's New</a></dt>
<dd>
<dl>
<dt>2.1 <a href="#KERNEL">Kernel Changes</a></dt>
<dd>
<dl>
<dt>2.1.1 <a href="#AEN54">Processor/Motherboard
Support</a></dt>
<dt>2.1.2 <a href="#AEN60">Boot Loaders</a></dt>
<dt>2.1.3 <a href="#AEN65">Network Interface
Support</a></dt>
<dt>2.1.4 <a href="#AEN128">Network
Protocols</a></dt>
<dt>2.1.5 <a href="#AEN145">Disks and
Storage</a></dt>
<dt>2.1.6 <a href="#AEN171">Filesystems</a></dt>
<dt>2.1.7 <a href="#AEN174">PCCARD
Support</a></dt>
<dt>2.1.8 <a href="#AEN177">Multimedia
Support</a></dt>
<dt>2.1.9 <a href="#AEN186">Contributed
Software</a></dt>
</dl>
</dd>
<dt>2.2 <a href="#SECURITY">Security
Advisories</a></dt>
<dt>2.3 <a href="#USERLAND">Userland Changes</a></dt>
<dd>
<dl>
<dt>2.3.1 <a href="#AEN537">Contributed
Software</a></dt>
<dt>2.3.2 <a href="#AEN625">Ports/Packages
Collection</a></dt>
</dl>
</dd>
<dt>2.4 <a href="#AEN632">Release Engineering and
Integration</a></dt>
</dl>
</dd>
<dt>3 <a href="#AEN645">Upgrading from previous releases
of FreeBSD</a></dt>
</dl>
</div>
<div class="SECT1">
<hr>
<h1 class="SECT1"><a name="AEN13">1 Introduction</a></h1>
<p>This document contains the release notes for FreeBSD
4.6.2-RELEASE on the IA-32 hardware platform. It describes
new features of FreeBSD that have been added (or changed)
since 4.5-RELEASE. It also provides some notes on upgrading
from previous versions of FreeBSD.</p>
<p>This distribution of FreeBSD 4.6.2-RELEASE is a ``point
release'', intended to address some issues (primarily
security-related) discovered in FreeBSD 4.6-RELEASE.
Originally, it was to carry the version number 4.6.1.
However, several additional issues arose during the release
engineering process, causing added delays. To avoid
confusion, the release engineering and security teams
decided that it would be best to rename the
release-in-progress to 4.6.2.</p>
<p>This distribution can be found at <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/releases" target=
"_top">ftp://ftp.FreeBSD.org/pub/FreeBSD/releases</a> or
any of its mirrors. More information on obtaining this (or
other) release distributions of FreeBSD can be found in the
<a href=
"http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/mirrors.html"
target="_top">``Obtaining FreeBSD''</a> appendix in the <a
href=
"http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/"
target="_top">FreeBSD Handbook</a>.</p>
</div>
<div class="SECT1">
<hr>
<h1 class="SECT1"><a name="AEN23">2 What's New</a></h1>
<p>This section describes the most user-visible new or
changed features in FreeBSD since 4.5-RELEASE. Typical
release note items document new drivers or hardware
support, new commands or options, major bugfixes, or
contributed software upgrades. Security advisories for the
base system that were issued after 4.5-RELEASE are also
listed.</p>
<p>Release note entries that describe changes specific to
this point release are marked with [4.6.2].</p>
<div class="SECT2">
<hr>
<h2 class="SECT2"><a name="KERNEL">2.1 Kernel
Changes</a></h2>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=puc&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">puc</span>(4)</span></a> (PCI
``Universal'' Communications) driver has been added, to
help connect PCI-based serial ports to the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sio&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sio</span>(4)</span></a> driver.</p>
<p>The kernel dump device can now be set via the <tt
class="VARNAME">dumpdev</tt> loader tunable. As a result,
it is now possible to obtain crash dumps from panics
during the late stages of kernel initialization (before
the system enters into single-user mode).</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=snp&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">snp</span>(4)</span></a> device is no
longer static and can now be compiled as a module.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=spic&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">spic</span>(4)</span></a> driver, which
provides access to the Jog Dial device on some Sony
laptops, has been added. <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=moused&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">moused</span>(8)</span></a> support for
this device has also been added.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=viapm&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">viapm</span>(4)</span></a> driver for VIA
SMBus power management controllers has been added.</p>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN54">2.1.1
Processor/Motherboard Support</a></h3>
<p>The <tt class="LITERAL">CPU_ATHLON_SSE_HACK</tt>
kernel option has been added, which attempts to enable
the SSE feature bit on newer Athlon CPUs if the BIOS
has forgotten to enable it.</p>
<p>On some systems, the BIOS does not activate the I/O
ports and memory of PCI devices, thus making them
unusable. The <tt class=
"LITERAL">PCI_ENABLE_IO_MODES</tt> kernel option forces
FreeBSD to enable these devices so that they can be
used.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN60">2.1.2 Boot
Loaders</a></h3>
<p><tt class="FILENAME">boot2</tt> now supports a <tt
class="OPTION">-n</tt> option to disallow boot
interruption by keypresses.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN65">2.1.3 Network
Interface Support</a></h3>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=an&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">an</span>(4)</span></a> driver now
supports Cisco LEAP, as well as the ``Home'' WEP key.
The Linux Aironet utilities are now supported under
emulation.</p>
<p>Generic support for ARCNET token-based networks has
been added.</p>
<p>The cm driver has been added to support SMC COM90cx6
ARCNET network adapters.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=dc&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">dc</span>(4)</span></a> driver now has
support for VLANs.</p>
<p>Support for Intel Gigabit Ethernet cards in the <tt
class="FILENAME">GENERIC</tt> kernel is now provided by
the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=em&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">em</span>(4)</span></a> driver, rather
than the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=wx&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">wx</span>(4)</span></a> driver. The
latter driver has been deprecated since FreeBSD
4.5-RELEASE.</p>
<p>The my driver, which supports the Myson Fast
Ethernet and Gigabit Ethernet adapters, has been
added.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=wi&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">wi</span>(4)</span></a> driver now has
support for Prism II and Prism 2.5-based NICs.
104/128-bit WEP now works on Prism cards.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=wi&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">wi</span>(4)</span></a> driver now
supports using a FreeBSD host as a wireless access
point. This functionality can be enabled using the <tt
class="LITERAL">mediaopt hostap</tt> option of <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ifconfig&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ifconfig</span>(8)</span></a>. This
feature requires a wireless adapter based on the Prism
II chipset.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=wi&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">wi</span>(4)</span></a> driver now has
support for <b class=
"APPLICATION">bsd-airtools</b>.</p>
<p>The xe driver can now be built as a module.</p>
<p>Selected network drivers now implement a
semi-polling mode, which makes systems much more
resilient to attacks and overloads. To enable polling,
the following options are required in a kernel
configuration file:</p>
<pre class="PROGRAMLISTING">
options DEVICE_POLLING
options HZ=1000 # not compulsory but strongly recommended
</pre>
The <tt class="VARNAME">kern.polling.enable</tt> sysctl
variable will then activate polling mode; with the <tt
class="VARNAME">kern.polling.user_frac</tt> sysctl
indicating the percentage of CPU time to be reserved
for userland. The devices initially supporting polling
are <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=dc&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">dc</span>(4)</span></a>, <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=fxp&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">fxp</span>(4)</span></a>, <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=rl&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">rl</span>(4)</span></a>, and <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sis&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sis</span>(4)</span></a>. More details
can be found in the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=polling&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">polling</span>(4)</span></a> manual
page.<br>
<br>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN128">2.1.4 Network
Protocols</a></h3>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=bridge&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">bridge</span>(4)</span></a> now has
better support for multiple, fully-independent bridging
clusters, and is much more stable in the presence of
dynamic attachments and detatchments. Full support for
VLANs is also supported.</p>
<p>A bug in the IPsec processing for IPv4, which caused
the inbound SPD checks to be ignored, has been
fixed.</p>
<p>A new ng_eiface netgraph module has been added,
which appears as an Ethernet interface but delivers its
Ethernet frames to a Netgraph hook.</p>
<p>A new <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ng_etf&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ng_etf</span>(4)</span></a> netgraph
node allows Ethernet type packets to be filtered to
different hooks depending on ethertype.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=tcp&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">tcp</span>(4)</span></a> syncache
implementation had a bug that could cause kernel
panics; this has been fixed.</p>
<p>The TCP implementation now properly ignores packets
addressed to IP-layer broadcast addresses.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN145">2.1.5 Disks and
Storage</a></h3>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ahc&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ahc</span>(4)</span></a> driver was
synchronized with the version from FreeBSD -CURRENT as
of 29 April 2002.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ata</span>(4)</span></a> driver was
synchronized with the driver from FreeBSD -CURRENT as
of 18 March 2002.</p>
<p>[4.6.2] A bug which sometimes prevented <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ata</span>(4)</span></a> tagged
queueing from working correctly has been corrected.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ata</span>(4)</span></a> driver now has
support for creating, deleting, querying, and
rebuilding ATA RAIDs under control of <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=atacontrol&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">atacontrol</span>(8)</span></a>.</p>
<p>[4.6.2] The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ata</span>(4)</span></a> driver now
computes maximum transfer sizes correctly. This fixes
numerous <tt class="LITERAL">READ_BIG</tt> and other
errors that occurred when accessing certain ATA
devices.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN171">2.1.6
Filesystems</a></h3>
<p>A bug was been fixed in soft updates that could
cause occasional filesystem corruption if the system is
shut down immediately after performing heavy filesystem
activities, such as installing a new kernel or other
software.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN174">2.1.7 PCCARD
Support</a></h3>
<p>[4.6.2] A bug has been fixed in the PCCARD power
code. This fixes a problem (primarily seen with Sony
VAIO and Toshiba laptops) where some machines would
hang at boot-time or at their first PCCARD access. Some
other problems related to this bug may be also be
corrected; in particular, Toshiba laptops based on the
ToPIC chip will now be able to use both slots at the
same time, and some workarounds for PCI add-in cards
are no longer necessary.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN177">2.1.8 Multimedia
Support</a></h3>
<p>The ufm driver, supporting the D-Link DSB-R100 USB
Radio, has been added.</p>
<p>The via82c686 sound driver now supports the VIA
VT8233.</p>
<p>The ich sound driver now supports the SiS 7012
chipset.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pcm&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pcm</span>(4)</span></a> driver was
synchronized with the version from FreeBSD -CURRENT as
of 22 April 2002.</p>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN186">2.1.9 Contributed
Software</a></h3>
<div class="SECT4">
<h4 class="SECT4"><a name="AEN188">2.1.9.1
IPFilter</a></h4>
<p><b class="APPLICATION">IPFilter</b> has been
updated to 3.4.27.</p>
</div>
<div class="SECT4">
<hr>
<h4 class="SECT4"><a name="AEN192">2.1.9.2
isdn4bsd</a></h4>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ifpi2&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ifpi2</span>(4)</span></a> driver for
supporting the AVM Fritz!Card PCI version 2
controller has been added.</p>
</div>
</div>
</div>
<div class="SECT2">
<hr>
<h2 class="SECT2"><a name="SECURITY">2.2 Security
Advisories</a></h2>
<p>An ``off-by-one'' bug has been fixed in <b class=
"APPLICATION">OpenSSH</b>'s multiplexing code. This bug
could have allowed an authenticated remote user to cause
<a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sshd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sshd</span>(8)</span></a> to execute
arbitrary code with superuser privileges, or allowed a
malicious SSH server to execute arbitrary code on the
client system with the privileges of the client user.
(See security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:13.openssh.asc"
target="_top">FreeBSD-SA-02:13</a>.)</p>
<p>A programming error in <b class="APPLICATION">zlib</b>
could result in attempts to free memory multiple times.
The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=malloc&sektion=3&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">malloc</span>(3)</span></a>/<a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=free&sektion=3&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">free</span>(3)</span></a> routines used
in FreeBSD are not vulnerable to this error, but
applications receiving specially-crafted blocks of
invalid compressed data could be made to function
incorrectly or abort. This <b class=
"APPLICATION">zlib</b> bug has been fixed. For a
workaround and solutions, see security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:18.zlib.v1.2.asc"
target="_top">FreeBSD-SA-02:18</a>.</p>
<p>Bugs in the TCP SYN cache (``syncache'') and SYN
cookie (``syncookie'') implementations, which could cause
legitimate TCP/IP traffic to crash a machine, have been
fixed. For a workaround and patches, see security
advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc"
target="_top">FreeBSD-SA-02:20</a>.</p>
<p>A routing table memory leak, which could allow a
remote attacker to exhaust the memory of a target
machine, has been fixed. A workaround and patches can be
found in security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:21.tcpip.asc"
target="_top">FreeBSD-SA-02:21</a>.</p>
<p>A bug with memory-mapped I/O, which could cause a
system crash, has been fixed. For more information about
a solution, see security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:22.mmap.asc"
target="_top">FreeBSD-SA-02:22</a>.</p>
<p>A security hole, in which SUID programs could be made
to read from or write to inappropriate files through
manipulation of their standard I/O file descriptors, has
been fixed. Information regarding a solution can be found
in security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:23.stdio.asc"
target="_top">FreeBSD-SA-02:23</a>.</p>
<p>[4.6.2] The original fix for security advisory
SA-02:23 (which addressed the use of file descriptors by
set-user-id or set-group-id programs) contained an error.
It was still possible for systems using <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=procfs&sektion=5&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">procfs</span>(5)</span></a> or <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=linprocfs&sektion=5&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">linprocfs</span>(5)</span></a> to be
exploited. This error has now been corrected; a revised
version of security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:23.stdio.asc"
target="_top">FreeBSD-SA-02:23</a> contains more
details.</p>
<p>Some unexpected behavior could be allowed with <a
href=
"http://www.FreeBSD.org/cgi/man.cgi?query=k5su&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">k5su</span>(8)</span></a> because it does
not require that an invoking user be a member of the <tt
class="GROUPNAME">wheel</tt> group when attempting to
become the superuser (this is the case with <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=su&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">su</span>(1)</span></a>). To avoid this
situation, <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=k5su&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">k5su</span>(8)</span></a> is now
installed non-SUID by default (effectively disabling it).
More information can be found in security advisory <a
href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:24.k5su.asc"
target="_top">FreeBSD-SA-02:24</a>.</p>
<p>Multiple vulnerabilities were found in the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=bzip2&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">bzip2</span>(1)</span></a> utility, which
could allow files to be overwritten without warning or
allow local users unintended access to files. These
problems have been corrected with a new import of <b
class="APPLICATION">bzip2</b>. For more information, see
security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:25.bzip2.asc"
target="_top">FreeBSD-SA-02:25</a>.</p>
<p>A bug has been fixed in the implementation of the TCP
SYN cache (``syncache''), which could allow a remote
attacker to deny access to a service when accept filters
(see <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=accept_filter&sektion=9&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">accept_filter</span>(9)</span></a>) were
in use. This bug has been fixed; for more information,
see security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:26.accept.asc"
target="_top">FreeBSD-SA-02:26</a>.</p>
<p>Due to a bug in <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=rc&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">rc</span>(8)</span></a>'s use of shell
globbing, users may be able to remove the contents of
arbitrary files if <tt class=
"FILENAME">/tmp/.X11-unix</tt> does not exist and the
system can be made to reboot. This bug has been corrected
(see security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:27.rc.asc"
target="_top">FreeBSD-SA-02:27</a>).</p>
<p>[4.6.2] A buffer overflow in the resolver, which could
be exploited by a malicious domain name server or an
attacker forging DNS messages, has been fixed. See
security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:28.resolv.asc"
target="_top">FreeBSD-SA-02:28</a> for more details.</p>
<p>[4.6.2] A buffer overflow in <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=tcpdump&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">tcpdump</span>(1)</span></a>, which could
be triggered by badly-formed NFS packets, has been fixed.
See security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:29.tcpdump.asc"
target="_top">FreeBSD-SA-02:29</a> for more details.</p>
<p>[4.6.2] <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ktrace&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ktrace</span>(1)</span></a> can no longer
trace the operation of formerly privileged processes;
this prevents the leakage of sensitive information that
the process could have obtained before abandoning its
privileges. For a discussion of this issue, see security
advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:30.ktrace.asc"
target="_top">FreeBSD-SA-02:30</a> for more details.</p>
<p>[4.6.2] A race condition in <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pppd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pppd</span>(8)</span></a>, which could be
used to change the permissions of an arbitrary file, has
been corrected. For more information, see security
advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:32.pppd.asc"
target="_top">FreeBSD-SA-02:32</a>.</p>
<p>[4.6.2] Multiple buffer overflows in <b class=
"APPLICATION">OpenSSL</b> have been corrected, by way of
an upgrade to the base system version of <b class=
"APPLICATION">OpenSSL</b>. More details can be found in
security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:33.openssl.asc"
target="_top">FreeBSD-SA-02:33</a>.</p>
<p>[4.6.2] A heap buffer overflow in the XDR decoder has
been fixed. For more details, see security advisory <a
href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:34.rpc.asc"
target="_top">FreeBSD-SA-02:34</a>.</p>
<p>[4.6.2] A bug that could allow local users to read and
write arbitrary blocks on an FFS filesystem has been
corrected. More details can be found in security advisory
<a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:35.ffs.asc"
target="_top">FreeBSD-SA-02:35</a>.</p>
<p>[4.6.2] A bug in the NFS server code, which could
allow a remote denial of service attack, has been fixed.
Security advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:36.nfs.asc"
target="_top">FreeBSD-SA-02:36</a> has more details.</p>
<p>[4.6.2] A bug that could allow local users to panic a
system using the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=kqueue&sektion=2&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">kqueue</span>(2)</span></a> mechanism has
been fixed. More information is contained in security
advisory <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:37.kqueue.asc"
target="_top">FreeBSD-SA-02:37</a>.</p>
</div>
<div class="SECT2">
<hr>
<h2 class="SECT2"><a name="USERLAND">2.3 Userland
Changes</a></h2>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=atacontrol&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">atacontrol</span>(8)</span></a> has been
added to control various aspects of the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ata</span>(4)</span></a> driver.</p>
<p>On ATAPI CDROM drives, <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=cdcontrol&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">cdcontrol</span>(1)</span></a> now
supports a <tt class="LITERAL">speed</tt> command to set
the maximum speed to be used by the drive.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ctags&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ctags</span>(1)</span></a> no longer
creates a corrupt tags file if the source file used <tt
class="LITERAL">//</tt> (C++-style) comments.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=dump&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">dump</span>(8)</span></a> now supplies
progress information in its process title, useful for
monitoring automated backups.</p>
<p><tt class="FILENAME">/etc/rc.firewall</tt> and <tt
class="FILENAME">/etc/rc.firewall6</tt> will no longer
add their own hardcoded rules in the cases of a rules
file in the <tt class="VARNAME">firewall_type</tt>
variable or a non-existent firewall type. (The motivation
for this change is to avoid acting on assumptions about a
site's firewall policies.) In addition, the <tt class=
"LITERAL">closed</tt> firewall type now works as
documented in the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=rc.firewall&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">rc.firewall</span>(8)</span></a> manual
page.</p>
<p>The functionality of <tt class=
"FILENAME">/etc/security</tt> has been been moved into a
set of scripts under the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=periodic&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">periodic</span>(8)</span></a> framework,
to make local customization easier and more maintainable.
These scripts now reside in <tt class=
"FILENAME">/etc/periodic/security/</tt>.</p>
<p>The <tt class="OPTION">ether</tt> address family of <a
href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ifconfig&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ifconfig</span>(8)</span></a> has been
changed to a more generic <tt class="OPTION">link</tt>
family (<tt class="OPTION">ether</tt> is still accepted
for backwards compatability).</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=fsdb&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">fsdb</span>(8)</span></a> now supports a
<tt class="LITERAL">blocks</tt> command to list the
blocks allocated by a particular inode.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ispppcontrol&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ispppcontrol</span>(8)</span></a> has
been deleted, and its functionality has been folded into
<a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=spppcontrol&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">spppcontrol</span>(8)</span></a>.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=k5su&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">k5su</span>(8)</span></a> is no longer
installed SUID <tt class="USERNAME">root</tt> by default.
Users requiring this feature can either manually change
the permissions on the <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=k5su&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">k5su</span>(8)</span></a> executable or
add <tt class="LITERAL">ENABLE_SUID_K5SU=yes</tt> to <tt
class="FILENAME">/etc/make.conf</tt> before a source
upgrade.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ldd&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ldd</span>(1)</span></a> can now be used
on shared libraries, in addition to executables.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=last&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">last</span>(1)</span></a> now supports a
<tt class="OPTION">-y</tt> flag, which causes the year to
be included in the session start time.</p>
<p><tt class="FILENAME">libstand</tt> now has support for
loading large kernels and modules split across several
physical media.</p>
<p><tt class="FILENAME">libusb</tt> has been renamed as
<tt class="FILENAME">libusbhid</tt>, following NetBSD's
naming conventions.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=lpd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">lpd</span>(8)</span></a> now recognizes
the <tt class="OPTION">-s</tt> flag as the preferred
synonym for <tt class="OPTION">-p</tt> (these flags cause
<a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=lpd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">lpd</span>(8)</span></a> not to open a
socket for network print jobs).</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=lpd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">lpd</span>(8)</span></a> now implements a
new <tt class="LITERAL">rc</tt> printcap option. When
specified in a print queue for a remote host, boolean
option causes <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=lpd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">lpd</span>(8)</span></a> to resend the
data file for each copy the user requested via <tt class=
"COMMAND">lpr -#<tt class=
"REPLACEABLE"><i>n</i></tt></tt>.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ls&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ls</span>(1)</span></a> now accepts a <tt
class="OPTION">-h</tt> flag, which when combined with the
<tt class="OPTION">-l</tt> flag, causes file sizes to be
printed with unit suffixes, such that the number of
digits printed is fewer than four.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=m4&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">m4</span>(1)</span></a> now accepts a <tt
class="OPTION">-s</tt> flag to cause it to emit <tt
class="LITERAL">#line</tt> directives for use by <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=cpp&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">cpp</span>(1)</span></a>.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=mergemaster&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">mergemaster</span>(8)</span></a> now
supports two new flags. The <tt class="OPTION">-p</tt>
flag enables a ``pre-<tt class=
"LITERAL">buildworld</tt>'' mode to compare files known
to be essential to the success of the <tt class=
"LITERAL">buildworld</tt> and <tt class=
"LITERAL">installworld</tt> system updating steps. The
<tt class="OPTION">-C</tt> flag, used after a successful
<a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=mergemaster&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">mergemaster</span>(8)</span></a> run,
compares options in <tt class=
"FILENAME">/etc/rc.conf</tt> to the default options in
<tt class="FILENAME">/etc/defaults/rc.conf</tt>.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ngctl&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ngctl</span>(8)</span></a> now supports a
<tt class="OPTION">write</tt> command to send a data
packet down a given hook.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=patch&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">patch</span>(1)</span></a> now accepts a
<tt class="OPTION">-i</tt> command-line flag to read a
patch from a file, rather than standard input.</p>
<p>[4.6.2] <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_opie&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_opie</span>(8)</span></a> no longer
emits fake challenges when the <tt class=
"VARNAME">no_fake_prompts</tt> variable is specified.</p>
<p>[4.6.2] A <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_opieaccess&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_opieaccess</span>(8)</span></a>
module has been added.</p>
<p>[4.6.2] <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_radius&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_radius</span>(8)</span></a>, <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_ssh&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_ssh</span>(8)</span></a>, and <a
href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_tacplus&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_tacplus</span>(8)</span></a> have
been synchronized with the versions in FreeBSD -CURRENT
as of 3 July 2002.</p>
<p>A <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_ssh&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_ssh</span>(8)</span></a> module has
been added to allow the use of SSH passphrases and
keypairs for authentication. This module also handles
session management by invoking <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ssh-agent&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ssh-agent</span>(1)</span></a>.</p>
<p>[4.6.2] <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pam_unix&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pam_unix</span>(8)</span></a> has been
synchronized with the version in FreeBSD -CURRENT as of 9
March 2002 (pre-<b class="APPLICATION">OpenPAM</b>).</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pr&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pr</span>(1)</span></a> now supports the
<tt class="OPTION">-f</tt> and <tt class="OPTION">-p</tt>
flags to pause output going to a terminal.</p>
<p>The <tt class="OPTION">-W</tt> option to <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ps&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ps</span>(1)</span></a> (to extract
information from a specified swap device) has been
useless for some time; it has been removed.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=reboot&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">reboot</span>(8)</span></a> now takes a
<tt class="OPTION">-k</tt> to specify the next kernel to
boot.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sshd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sshd</span>(8)</span></a> no longer emits
fake S/Key challenges for users who do not have S/Key
enabled. The prior behavior created confusing, useless
one-time-password prompts when using some newer SSH
clients to connect to a FreeBSD system.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sysinstall&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sysinstall</span>(8)</span></a> now has
rudimentary support for retrieving packages from the
correct volume of a multiple-volume installation (such as
a multi-CD distribution).</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=tftp&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">tftp</span>(1)</span></a> and <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=tftpd&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">tftpd</span>(8)</span></a> now support
IPv6.</p>
<p>The <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=usbhidctl&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">usbhidctl</span>(1)</span></a> utility
has been added to manipulate USB Human Interface
Devices.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=uuencode&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">uuencode</span>(1)</span></a> and <a
href=
"http://www.FreeBSD.org/cgi/man.cgi?query=uudecode&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">uudecode</span>(1)</span></a> now accept
a <tt class="OPTION">-o</tt> option to set their output
files. <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=uuencode&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">uuencode</span>(1)</span></a> can now be
made to do base64 encoding when given the <tt class=
"OPTION">-m</tt> flag, while <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=uudecode&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">uudecode</span>(1)</span></a> can now
automatically decode base64 files.</p>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=watch&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">watch</span>(8)</span></a> now takes a
<tt class="OPTION">-f</tt> option to specify a <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=snp&sektion=4&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">snp</span>(4)</span></a> device to
use.</p>
<p>Locales with names of the form <tt class=
"LITERAL">*.EUC</tt> have been renamed to the form <tt
class="LITERAL">*.euc??</tt>. For example, <tt class=
"LITERAL">ja_JP.EUC</tt> has become <tt class=
"LITERAL">ja_JP.eucJP</tt>. This improves locale name
compatability with FreeBSD CURRENT, X11R6, and a number
of other UNIX versions.</p>
<p>The locale support was synchronized with the code from
FreeBSD -CURRENT. This change brings support for the <tt
class="LITERAL">LC_NUMERIC</tt>, <tt class=
"LITERAL">LC_MONETARY</tt>, and <tt class=
"LITERAL">LC_MESSAGES</tt> categories, as well as
improvements to <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=strftime&sektion=3&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">strftime</span>(3)</span></a>, revised
locale definitions, and improvement of the localization
of many base system programs.</p>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN537">2.3.1 Contributed
Software</a></h3>
<p>[4.6.2] <b class="APPLICATION">BIND</b> has been
updated to 8.3.3.</p>
<p><b class="APPLICATION">bzip2</b> has been updated to
1.0.2.</p>
<p><b class="APPLICATION">Heimdal Kerberos</b> has been
updated to 0.4e.</p>
<p>The <b class="APPLICATION">ISC DHCP</b> client has
been updated to 3.0.1RC8.</p>
<p>[4.6.2] <b class="APPLICATION">OpenSSH</b> has been
updated to version 3.4p1. Among the changes:</p>
<ul>
<li>
<p>The <tt class="FILENAME">*2</tt> files are
obsolete (for example, <tt class=
"FILENAME">~/.ssh/known_hosts</tt> can hold the
contents of <tt class=
"FILENAME">~/.ssh/known_hosts2</tt>).</p>
</li>
<li>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ssh-keygen&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ssh-keygen</span>(1)</span></a> can
import and export keys using the SECSH Public Key
File Format, for key exchange with several
commercial SSH implementations.</p>
</li>
<li>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ssh-add&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ssh-add</span>(1)</span></a> now
adds all three default keys.</p>
</li>
<li>
<p><a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=ssh-keygen&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">ssh-keygen</span>(1)</span></a> no
longer defaults to a specific key type; one must be
specified with the <tt class="OPTION">-t</tt>
option.</p>
</li>
<li>
<p>A ``privilege separation'' feature, which uses
unprivileged processes to contain and restrict the
effects of future compromises or programming
errors.</p>
</li>
<li>
<p>Several bugfixes, including closure of a
security hole that could lead to an integer
overflow and undesired privilege escalation.</p>
</li>
</ul>
<div class="NOTE">
<blockquote class="NOTE">
<p><b>Note:</b> As with FreeBSD 4.6-RELEASE, <tt
class="LITERAL">Protocol 1,2</tt> remains the
default protocol setting in <tt class=
"FILENAME">/etc/ssh/ssh_config</tt>. In FreeBSD
-CURRENT (and FreeBSD 4-STABLE as of this writing),
the default is <tt class="LITERAL">Protocol
2,1</tt>.</p>
</blockquote>
</div>
<br>
<br>
<p>[4.6.2] <b class="APPLICATION">OpenSSL</b> has been
updated to 0.9.6e.</p>
<p><b class="APPLICATION">texinfo</b> has been updated
to 4.1.</p>
<p>The timezone database has been updated to the <tt
class="FILENAME">tzdata2002c</tt> release.</p>
<div class="SECT4">
<hr>
<h4 class="SECT4"><a name="AEN587">2.3.1.1
Sendmail</a></h4>
<p><b class="APPLICATION">sendmail</b> has been
updated to 8.12.3. <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sendmail&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sendmail</span>(8)</span></a> is no
longer installed as a set-user-ID <tt class=
"USERNAME">root</tt> binary (now set-group-ID <tt
class="GROUPNAME">smmsp</tt>). See <tt class=
"FILENAME">/usr/src/contrib/sendmail/RELEASE_NOTES</tt>
and <tt class="FILENAME">/etc/mail/README</tt> for
more information.</p>
<p>With this <b class="APPLICATION">sendmail</b>
upgrade, multiple <b class="APPLICATION">sendmail</b>
daemons (some required to handle outgoing mail) are
started by <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=rc&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">rc</span>(8)</span></a>, even if the
<tt class="VARNAME">sendmail_enable</tt> variable is
set to <tt class="LITERAL">NO</tt>. To completely
disable <b class="APPLICATION">sendmail</b>, <tt
class="VARNAME">sendmail_enable</tt> must be set to
<tt class="LITERAL">NONE</tt>. Alternatively, for
systems using a different MTA, the <tt class=
"VARNAME">mta_start_script</tt> variable can be used
to point to a different startup script (more details
can be found in <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=rc.sendmail&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">rc.sendmail</span>(8)</span></a>).</p>
<p>The permissions for <b class=
"APPLICATION">sendmail</b> alias and map databases
built via <tt class=
"FILENAME">/etc/mail/Makefile</tt> now default to
mode 0640 to protect against a file locking local
denial of service. It can be changed by setting the
new <tt class="VARNAME">SENDMAIL_MAP_PERMS</tt> <tt
class="FILENAME">make.conf</tt> option.</p>
<p>The permissions for the <b class=
"APPLICATION">sendmail</b> statistics file, <tt
class="FILENAME">/var/log/sendmail.st</tt>, have been
changed from mode 0644 to mode 0640 to protect
against a file locking local denial of service.</p>
<p>[4.6.2] A potential DNS map buffer overflow bug
(in code that is not used in configurations by
default) has been fixed.</p>
<div class="NOTE">
<blockquote class="NOTE">
<p><b>Note:</b> This bug has been addressed in
FreeBSD 4.6-STABLE by the import of a newer
version of <b class=
"APPLICATION">sendmail</b>.</p>
</blockquote>
</div>
<br>
<br>
</div>
</div>
<div class="SECT3">
<hr>
<h3 class="SECT3"><a name="AEN625">2.3.2 Ports/Packages
Collection</a></h3>
<p>The Ports Collection infrastructure now uses <b
class="APPLICATION">XFree86</b> 4.2.0 as the default
version of the X Window System for the purposes of
satisfying dependencies. To return to using <b class=
"APPLICATION">XFree86</b> 3.3.6, add the following line
to <tt class="FILENAME">/etc/make.conf</tt>:</p>
<pre class="PROGRAMLISTING">
XFREE86_VERSION=3
</pre>
</div>
</div>
<div class="SECT2">
<hr>
<h2 class="SECT2"><a name="AEN632">2.4 Release
Engineering and Integration</a></h2>
<p><b class="APPLICATION">XFree86</b> 4.2.0 is now the
default version of the X Window System supported by <a
href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sysinstall&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sysinstall</span>(8)</span></a>. It
installs <b class="APPLICATION">XFree86</b> as a set of
standard binary packages, so the usual package utilities
such as <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=pkg_info&sektion=1&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">pkg_info</span>(1)</span></a> can be used
to examine/manipulate its components.</p>
<p>[4.6.2] A bug that caused <tt class=
"FILENAME">/usr/share/examples</tt> to be incompletely
populated on fresh installs has been fixed.</p>
</div>
</div>
<div class="SECT1">
<hr>
<h1 class="SECT1"><a name="AEN645">3 Upgrading from
previous releases of FreeBSD</a></h1>
<p>If you're upgrading from a previous release of FreeBSD,
you generally will have three options:</p>
<ul>
<li>
<p>Using the binary upgrade option of <a href=
"http://www.FreeBSD.org/cgi/man.cgi?query=sysinstall&sektion=8&manpath=FreeBSD+4.6-RELEASE">
<span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">sysinstall</span>(8)</span></a>. This
option is perhaps the quickest, although it presumes
that your installation of FreeBSD uses no special
compilation options.</p>
</li>
<li>
<p>Performing a complete reinstall of FreeBSD.
Technically, this is not an upgrading method, and in
any case is usually less convenient than a binary
upgrade, in that it requires you to manually backup and
restore the contents of <tt class="FILENAME">/etc</tt>.
However, it may be useful in cases where you want (or
need) to change the partitioning of your disks.</p>
</li>
<li>
<p>From source code in <tt class=
"FILENAME">/usr/src</tt>. This route is more flexible,
but requires more disk space, time, and technical
expertise. More information can be found in the <a
href=
"http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html"
target="_top">``Using <tt class="COMMAND">make
world</tt>''</a> section of the <a href=
"http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/"
target="_top">FreeBSD Handbook</a>. Upgrading from
very old versions of FreeBSD may be problematic; in
cases like this, it is usually more effective to
perform a binary upgrade or a complete reinstall.</p>
</li>
</ul>
<br>
<br>
<p>Please read the <tt class="FILENAME">INSTALL.TXT</tt>
file for more information, preferably <span class=
"emphasis"><i class="EMPHASIS">before</i></span> beginning
an upgrade. If you are upgrading from source, please be
sure to read <tt class="FILENAME">/usr/src/UPDATING</tt> as
well.</p>
<p>Finally, if you want to use one of various means to
track the -STABLE or -CURRENT branches of FreeBSD, please
be sure to consult the <a href=
"http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html"
target="_top">``-CURRENT vs. -STABLE''</a> section of the
<a href=
"http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/"
target="_top">FreeBSD Handbook</a>.</p>
<div class="IMPORTANT">
<blockquote class="IMPORTANT">
<p><b>Important:</b> Upgrading FreeBSD should, of
course, only be attempted after backing up <span class=
"emphasis"><i class="EMPHASIS">all</i></span> data and
configuration files.</p>
</blockquote>
</div>
</div>
</div>
<hr>
<p align="center"><small>This file, and other release-related
documents, can be downloaded from <a href=
"ftp://ftp.FreeBSD.org/pub/FreeBSD/releases">ftp://ftp.FreeBSD.org/pub/FreeBSD/releases</a>.</small></p>
<p align="center"><small>For questions about FreeBSD, read the
<a href="http://www.FreeBSD.org/docs.html">documentation</a>
before contacting &#60;<a href=
"mailto:questions@FreeBSD.org">questions@FreeBSD.org</a>&#62;.</small></p>
<p align="center"><small>For questions about this
documentation, e-mail &#60;<a href=
"mailto:doc@FreeBSD.org">doc@FreeBSD.org</a>&#62;.</small></p>
<br>
<br>
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