Date: Thu, 29 Jan 2004 13:46:54 +0100 (CET)
From: (Thomas Biege) <[email protected]>
To: [email protected]Subject: SUSE Security Announcement: gaim (SuSE-SA:2004:004)
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______________________________________________________________________________
SUSE Security Announcement
Package: gaim
Announcement-ID: SuSE-SA:2004:004
Date: Thrusday, Jan 29th 2004 10:30 MET
Affected products: 8.0, 8.1, 8.2, 9.0
SuSE Linux Desktop 1.0
Vulnerability Type: remote system compromise
Severity (1-10): 5
SUSE default package: no
Cross References:
Content of this advisory:
1) security vulnerability resolved:
- two buffer overflows
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- kernel binaries for SLES8 AMD64
- mc
- mod_gzip
- tripwire
- XDM (XFree86, xf86)
- 3ddiag
- mod_auth_shadow
- cvsup
- nmap
- netpbm
- zebra
- quagga
- tcpdump
- mod_python
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
Gaim is a multi-protocol instant-messaging client. Stefan Esser found
12 vulnerabilities in gaim that can lead to a remote system compromise
with the privileges of the user running GAIM.
The GAIM package that SUSE LINUX ships is affected by just two of these
bug:
- Yahoo Packet Parser Overflow
- HTTP Proxy Connect Overflow
The first vulnerability is easy to exploit and results in a classic stack
overflow which can be used to execute arbitrary code.
The latter vulnerability requires the gaim client use a HTTP proxy under
the control of the attacker. The exploitation of this bug results in
arbitrary code execution too.
There is no known workaround.
Please download the update package for your distribution and verify its
integrity by the methods listed in section 3) of this announcement.
Then, to apply the update use the command "rpm -Fhv file.rpm".
Our maintenance customers are being notified individually. The packages
are being offered to install from the maintenance web.
Intel i386 Platform:
SuSE-9.0:
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/gaim-0.67-65.i586.rpm
09f8d12dd52e246cf32dca8ad3374f39
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/gaim-0.67-65.i586.patch.rpm
3a633e341b9e56facdbe0250b55dd33a
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/gaim-0.67-65.src.rpm
5ee6a86077c0297a64815532782f7a54
SuSE-8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/gaim-0.59.8-60.i586.rpm
7a269744304f72bf951c7bd6974560f2
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/gaim-0.59.8-60.i586.patch.rpm
e7b18f0da02c1c4392dc1b03e835a827
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/gaim-0.59.8-60.src.rpm
ae7d7b1c9735696244547a0d6a5ee92e
SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/gaim-0.59-158.i586.rpm
22b1d4be5737906f8ff0975918279034
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/gaim-0.59-158.i586.patch.rpm
7644020869e92cc980b881efebf9d617
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/gaim-0.59-158.src.rpm
cd1532f71a79ed32d016d456a844ff4b
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/gnm3/gaim-0.50-187.i386.rpm
7dcb581b78bf8ab61e82bf0836a4357e
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/gnm3/gaim-0.50-187.i386.patch.rpm
5a6f596538edc56e0b3a70a23200c21e
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/gaim-0.50-187.src.rpm
d38c8da629941eecef7f75d6a5ea9e80
______________________________________________________________________________
2) Pending vulnerabilities in SUSE Distributions and Workarounds:
- kernel binaries for SLES8 AMD64
Due to a human failure the kernel binaries of SuSE Linux Enterprise
Server 8 for AMD64 lack the fix described in SuSE-SA:2004:003. The
kernel-source packages and the packages for IA64 are *not* affected.
New packages are available at our maintenance-web.
- mc
By using a special combination of links in archive files it is possible
to execute arbitrary commands while mc tries to open it in its VFS.
New packages are available on our FTP servers.
- mod_gzip (apache-contrib)
The apache module mod_gzip is vulnerable to remote code execution
while running in debug-mode. We do not ship this module in debug-mode
but future versions will include the fix.
Additionally the mod_gzip code was audited to fix more possibly security
related bugs.
After more testing a new apache-contrib RPM package will be released.
- tripwire
Tripwire is a file integrity checker. The version of tripwire included
with SuSE Linux 9.0 crashs when a requested file does not exists.
New packages are available on our FTP servers.
- XDM (XFree86, xf86)
A missing check for failure conditions in the PAM code of XDM
can lead to local root access in conjunction with Kerberos or
other authentication methods.
New packages are available on our FTP servers.
- 3ddiag
Some 3ddiag scripts handle temporary files in an insecure manner.
Thanks to Stefan Nordhausen <nordhaus at informatik.hu-berlin.de>
for reporting some of these issues.
New packages are available on our FTP servers.
- mod_auth_shadow (apache-contrib)
This apache module ignores account expiration dates.
The update will be released together with mod_gzip.
- cvsup
cvsup uses a library path which is world-writeable. This behavior
can lead to local privilege escalation.
Thanks to Matthias Andree for notifying us.
Upcoming SuSE Linux versions have an automatic check enabled to detect
these types of bugs.
New packages are available on our FTP servers.
- nmap
Due to a bad interaction between kernel and user-space for pre-
calculated IP checksums nmap did not work on SUSE LINUX 9.0.
New packages are available on our FTP servers.
- netpbm
Some tools in the netpbm suite create files in an insecure manner
that can lead to local privilege escalation.
New packages will be available soon.
- zebra
Local users can send malicious netlink messages that cause
denial-of-service conditions in zebra.
New packages will be available soon.
- quagga
Local users can send malicious netlink messages that cause
denial-of-service conditions in the routing-daemon quagga.
New packages are available on our FTP servers.
- tcpdump
The code for handling ISAKMP and RADIUS messages contained bugs
which allowed remote attackers to crash tcpdump or to execute
arbitrary code.
New packages are available on our FTP servers.
- mod_python
A remote denial-of-service attack can be triggered against the Apache
web server by sending a specific query string that is processed by
mod_python.
New packages will be available soon.
______________________________________________________________________________
3) standard appendix: authenticity verification, additional information
- Package authenticity verification:
SUSE update packages are available on many mirror ftp servers all over
the world. While this service is being considered valuable and important
to the free and open source software community, many users wish to be
sure about the origin of the package and its content before installing
the package. There are two verification methods that can be used
independently from each other to prove the authenticity of a downloaded
file or rpm package:
1) md5sums as provided in the (cryptographically signed) announcement.
2) using the internal gpg signatures of the rpm package.
1) execute the command
md5sum <name-of-the-file.rpm>
after you downloaded the file from a SUSE ftp server or its mirrors.
Then, compare the resulting md5sum with the one that is listed in the
announcement. Since the announcement containing the checksums is
cryptographically signed (usually using the key [email protected]),
the checksums show proof of the authenticity of the package.
We disrecommend to subscribe to security lists which cause the
email message containing the announcement to be modified so that
the signature does not match after transport through the mailing
list software.
Downsides: You must be able to verify the authenticity of the
announcement in the first place. If RPM packages are being rebuilt
and a new version of a package is published on the ftp server, all
md5 sums for the files are useless.
2) rpm package signatures provide an easy way to verify the authenticity
of an rpm package. Use the command
rpm -v --checksig <file.rpm>
to verify the signature of the package, where <file.rpm> is the
filename of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an un-installed rpm
package file.
Prerequisites:
a) gpg is installed
b) The package is signed using a certain key. The public part of this
key must be installed by the gpg program in the directory
~/.gnupg/ under the user's home directory who performs the
signature verification (usually root). You can import the key
that is used by SUSE in rpm packages for SUSE Linux by saving
this announcement to a file ("announcement.txt") and
running the command (do "su -" to be root):
gpg --batch; gpg < announcement.txt | gpg --import
SUSE Linux distributions version 7.1 and thereafter install the
key "[email protected]" upon installation or upgrade, provided that
the package gpg is installed. The file containing the public key
is placed at the top-level directory of the first CD (pubring.gpg)
and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de .
- SUSE runs two security mailing lists to which any interested party may
subscribe:
[email protected]
- general/linux/SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an email to
<[email protected]>.
[email protected]
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an email to
<[email protected]>.
For general information or the frequently asked questions (faq)
send mail to:
<[email protected]> or
<[email protected]> respectively.
SUSE's security contact is <[email protected]> or <[email protected]>.
The <[email protected]> public key is listed below.
______________________________________________________________________________
The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way. In particular,
it is desired that the clear-text signature shows proof of the
authenticity of the text.
SUSE Linux AG makes no warranties of any kind whatsoever with respect
to the information contained in this security advisory.
Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <[email protected]>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <[email protected]>
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