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)
96 lines
3.4 KiB
Text
96 lines
3.4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
|
|
|
|
=============================================================================
|
|
FreeBSD-SA-01:37 Security Advisory
|
|
FreeBSD, Inc.
|
|
|
|
Topic: slrn contains remotely-exploitable buffer overflow
|
|
|
|
Category: ports
|
|
Module: slrn
|
|
Announced: 2001-04-23
|
|
Credits: Bill Nottingham
|
|
Affects: Ports collection prior to the correction date.
|
|
Corrected: 2001-04-04
|
|
Vendor status: Updated version released
|
|
FreeBSD only: NO
|
|
|
|
I. Background
|
|
|
|
slrn is a slang-based NNTP news reader.
|
|
|
|
II. Problem Description
|
|
|
|
The slrn port, versions prior to slrn-0.9.7.0, contains a buffer
|
|
overflow in the wrapping/unwrapping functions of message header
|
|
parsing. If a sufficiently long header is parsed, a buffer may
|
|
overflow allowing the execution of arbitrary code contained in a
|
|
message header as the user running the slrn program.
|
|
|
|
The slrn 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 5000 third-party applications in a ready-to-install format. The
|
|
ports collections shipped with FreeBSD 3.5.1 and 4.2 contain this
|
|
problem since it was discovered after the releases. The ports
|
|
collection that shipped with FreeBSD 4.3 is not vulnerable since this
|
|
problem was corrected prior to the release.
|
|
|
|
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
|
|
|
|
Arbitrary code may be executed on the local machine as the user
|
|
running the slrn program.
|
|
|
|
If you have not chosen to install the slrn port/package, then your
|
|
system is not vulnerable to this problem.
|
|
|
|
IV. Workaround
|
|
|
|
Deinstall the slrn port/package, it you have installed it.
|
|
|
|
V. Solution
|
|
|
|
One of the following:
|
|
|
|
1) Upgrade your entire ports collection and rebuild the slrn port.
|
|
|
|
2) Deinstall the old package and install a new package dated after the
|
|
correction date, obtained from:
|
|
|
|
[i386]
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/news/slrn-0.9.7.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/news/slrn-0.9.7.0.tgz
|
|
|
|
[alpha]
|
|
Packages are not automatically generated for the alpha architecture at
|
|
this time due to lack of build resources.
|
|
|
|
3) download a new port skeleton for the slrn 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/i386/packages-3-stable/devel/portcheckout-2.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
|
|
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz
|
|
|
|
-----BEGIN PGP SIGNATURE-----
|
|
Version: GnuPG v1.0.4 (FreeBSD)
|
|
Comment: FreeBSD: The Power To Serve
|
|
|
|
iQCVAwUBOuTqtVUuHi5z0oilAQHqsAP+PEzZ8FPPCrKKKDGP7gACN77r5dbbE9LF
|
|
MYSVGp2Z2+vwSysJG2BOtyNrrKlUhaKTLAoWZF+7ytV9ujli+bI06R2iYoe5SqMM
|
|
a7K1N1XKNvXdvq1nYjDuawIzJzl9b2B8XavPFEtwkkxDVAtq2ODKTabAtllrNnfV
|
|
hD4HsUzFMRI=
|
|
=al4w
|
|
-----END PGP SIGNATURE-----
|