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Several buffer overflows were found in the fontfile code that handles a user-supplied "fonts.alias" file. The file is processed with root privileges and therefore a successful exploitation of these bugs leads to local root access. There is no known workaround.
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-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SUSE Security Announcement
Package: xf86/XFree86
Announcement-ID: SuSE-SA:2004:006
Date: Monday, Feb. 23th 2004 16:30 MET
Affected products: 8.0, 8.1, 8.2, 9.0
SuSE Linux Database Server,
SuSE eMail Server III, 3.1
SuSE Linux Enterprise Server 7, 8
SuSE Linux Firewall on CD/Admin host
SuSE Linux Connectivity Server
SuSE Linux Office Server
Vulnerability Type: local privilege escalation
Severity (1-10): 5
SUSE default package: yes
Cross References: CAN-2004-0083
CAN-2004-0084
CAN-2004-0106
Content of this advisory:
1) security vulnerability resolved:
- several local buffer overflows in fontfile code
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds:
- mutt
- mod_python
- mailman
- metamail
- libxml2
- lbreakout
- pwlib
3) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion, solution, upgrade information
XFree86 is an open-source X Window System implementation that acts
as a client-server-based API between different hardware components
like display, mouse, keyboard and so on.
Several buffer overflows were found in the fontfile code that handles
a user-supplied "fonts.alias" file. The file is processed with root
privileges and therefore a successful exploitation of these bugs leads
to local root access.
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/XFree86-4.3.0.1-46.i586.rpm
dcaadc2b9438995c9a3ac6e4fc7bf181
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/XFree86-4.3.0.1-46.i586.patch.rpm
f094861c9a0fbb5f27d168b680fe1a5b
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/XFree86-4.3.0.1-46.src.rpm
824c6173693342a033f75c503592e7e0
SuSE-8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/XFree86-4.3.0-120.i586.rpm
f1f01280e6e8a5a2f091a04c5836a51d
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/XFree86-4.3.0-120.i586.patch.rpm
16ba90ef0ad607d1547cda7734b28750
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/XFree86-4.3.0-120.src.rpm
4100735436d4c8801c6add673fceb29e
SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/xf86-4.2.0-257.i586.rpm
9ed1fc5ec83a42a85315391387610e6b
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/xf86-4.2.0-257.i586.patch.rpm
9652732385f8670ea9d36151378b7428
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/xf86-4.2.0-257.src.rpm
e1d73191d2aabe3a6dda677e6fd716bc
SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/x1/xf86-4.2.0-257.i386.rpm
9b69aac017a0ac9905e3fc4e9594d435
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/x1/xf86-4.2.0-257.i386.patch.rpm
3076136bcdf20132f343768e4a71c7a2
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/xf86-4.2.0-257.src.rpm
1775eef155f4afdc9a3a08ff31a38607
Opteron x86_64 Platform:
SuSE-9.0:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/XFree86-4.3.0.1-52.x86_64.rpm
1714cb2eb566fab0e29277db9f9d2572
patch rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/XFree86-4.3.0.1-52.x86_64.patch.rpm
930944efc868b28d87a69a9543206546
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/XFree86-4.3.0.1-52.src.rpm
ee67773fcad341912b617d397991ed32
______________________________________________________________________________
2) Pending vulnerabilities in SUSE Distributions and Workarounds:
- mutt
The popular email client mutt is vulnerable to a remote denial-of-service
attack and maybe remote command execution. The bug can be triggered by
malformed messages that overflow an internal buffer.
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.
- mutt
The popular email client mutt is vulnerable to a remote denial-of-service
attack and maybe remote command execution. The bug can be triggered by
malformed messages that overflow an internal buffer.
New packages are available on our FTP servers..
- mailman
A remote denial-of-service attack can be triggered in mailman 2.0.x
(CAN-2003-0991).
New packages will be available soon.
- metamail
This update fixes two buffer overflows and two format string bugs
that can be exploited remotely in conjunction with other tools
to gain access to a system with the privileges of the user running
New packages will be available soon.
- libxml2
A buffer overflow in the URI parsing cde is fixed. This bug can
lead to remote access to a system using libxml2.
New packages will be available soon.
- lbreakout
A buffer overflow in lbreakout can be exploited locally to gain
access to group 'game'. This just affects SuSE Linux 8.1.
New packages will be available soon.
- pwlib
This update addresses several security vulnerabilities that
may be exploited remotely via applications that link with
pwlib, like GnomeMeeting or alike.
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
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 [e-mail:security@suse.de]),
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
to verify the signature of the package, where 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 "build@suse.de" 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:
[e-mail:suse-security@suse.com]
- general/linux/SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an email to
.
[e-mail:suse-security-announce@suse.com]
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an email to
.
For general information or the frequently asked questions (faq)
send mail to:
or
respectively.
=====================================================================
SUSE's security contact is or .
The 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
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key
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