3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
93 lines
3.4 KiB
Text
93 lines
3.4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
|
|
=============================================================================
|
|
FreeBSD-SA-00:11 Security Advisory
|
|
FreeBSD, Inc.
|
|
|
|
Topic: ircII port contains a remote overflow
|
|
|
|
Category: ports
|
|
Module: ircII
|
|
Announced: 2000-04-10
|
|
Credits: Derek Callaway <super@UDEL.EDU> via BugTraq
|
|
"bladi" <bladi@EUSKALNET.NET> via BugTraq
|
|
Affects: Ports collection before the correction date.
|
|
Corrected: 2000-03-19
|
|
FreeBSD only: NO
|
|
|
|
I. Background
|
|
|
|
ircII is a popular text-mode IRC client.
|
|
|
|
II. Problem Description
|
|
|
|
ircII version 4.4 contained a remotely-exploitable buffer overflow in
|
|
the /DCC CHAT command which allows remote users to execute arbitrary
|
|
code as the client user.
|
|
|
|
The bug was originally reported in 1997 in a much older version of
|
|
ircII, but was apparently not corrected at the time, and the problem
|
|
was recently rediscovered independently. Development on the version of
|
|
ircII previously in ports ceased several years ago, and has been taken
|
|
up by a new group who have fixed this problem (and possibly
|
|
others). FreeBSD now provides this new version of ircII.
|
|
|
|
The ircII port is not installed by default, nor is it "part of
|
|
FreeBSD" as such: it is part of the FreeBSD ports collection, which
|
|
contains over 3200 third-party applications in a ready-to-install
|
|
format. FreeBSD 4.0 did not ship with the ircII package available
|
|
because this vulnerability was reported to us late in the release
|
|
cycle and it was not possible to upgrade the port in time.
|
|
|
|
FreeBSD makes no claim about the security of these third-party
|
|
applications, although an effort is underway to provide a security
|
|
audit of the most security-critical ports.
|
|
|
|
III. Impact
|
|
|
|
A remote user can cause arbitrary code to be executed on the local
|
|
system as the user running ircII.
|
|
|
|
If you have not chosen to install the ircII port/package, then your
|
|
system is not known to be vulnerable to this problem, although there
|
|
are several other IRC clients which are derived from ircII including
|
|
Epic and BitchX. At this time it is unknown whether other clients are
|
|
vulnerable to this problem.
|
|
|
|
IV. Workaround
|
|
|
|
Remove the ircII port, if you you have installed it.
|
|
|
|
V. Solution
|
|
|
|
1) Upgrade your entire ports collection and rebuild the ircII port.
|
|
|
|
2) Reinstall a new package dated after the correction date, obtained from:
|
|
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/irc/ircII-4.4S.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/irc/ircII-4.4S.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-3-stable/irc/ircII-4.4S.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/irc/ircII-4.4S.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/irc/ircII-4.4S.tgz
|
|
|
|
3) download a new port skeleton for the ircII port from:
|
|
|
|
http://www.freebsd.org/ports/
|
|
|
|
and use it to rebuild the port.
|
|
|
|
4) Use the portcheckout utility to automate option (3) above. The
|
|
portcheckout port is available in /usr/ports/devel/portcheckout or the
|
|
package can be obtained from:
|
|
|
|
ftp://ftp.freebsd.org/pub/FreeBSD/ports/packages/devel/portcheckout-1.0.tgz
|
|
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: 2.6.2
|
|
|
|
iQCVAwUBOPJAMVUuHi5z0oilAQHKpgQAjdphg+Xaw4J7J5+dowvgrgoggA4YG0P5
|
|
a7Nodawpvm2ya8jBStmi0cs3LhYIXZUPQfY3lqiAfEbf4Ndd4r5KUbQ+iAjgz4lZ
|
|
XHG0PjUGE98dK3eHZbLszaMIwPbBaCyicCD0gLPCVm40O0VOlqY+WHO9MfITgpec
|
|
GFF3l8b8Ym0=
|
|
=IU1d
|
|
-----END PGP SIGNATURE-----
|