______________________________________________________________________________

SUSE Security Summary Report

Announcement-ID: SUSE-SR:2005:012
Date: Fri, 29 Apr 2005 14:00:00 +0000
Cross References: CAN-2005-0468
CAN-2005-0469
CAN-2005-0638
CAN-2005-0639
CAN-2005-0718
CAN-2005-0753
CAN-2005-1042
CAN-2005-1043
CAN-2005-1046
CAN-2005-1195

Content of this advisory:
1) solved security vulnerabilities:
- heimdal telnet buffer overflow
- php4, php5 bugs in exif parser
- cvs buffer overflow
- squid DoS
- xli shell quoting problems
2) pending vulnerabilities, solutions, workarounds:
- perl-Net-Server format string bug
- xine buffer overflow
- kimgio buffer overflows
3) standard appendix (further information)

______________________________________________________________________________

1) solved security vulnerabilities

To avoid spamming lists with advisories for every small incident,
we will release weekly summary advisories for issues where we have
released updates without a full advisory. Since these are minor
issues, md5sums and ftp urls are not included.

Fixed packages for the following incidents are already available on
our FTP server and via the YaST Online Update.

- heimdal telnet buffer overflow
This update fixes the telnet buffer overflows referenced by
CAN-2005-0469 and CAN-2005-0468 which also affected
the telnet client of the heimdal package.

All SUSE Linux based products were affected.

- php4, php5 bugs in exif parser
Bugs in the exif parser could allow an attacker to execute arbitrary code
or cause denial of service.

This is tracked by the Mitre CVE IDs CAN-2005-1042 and CAN-2005-1043

All SUSE Linux based products were affected.

- cvs buffer overflow
This update fixes a buffer overflows which allowed remote attackers to
execute arbitrary code.

This is tracked by the Mitre CVE ID CAN-2005-0753

All SUSE Linux based products were affected.

- squid DoS
Squid could crash when a client unexpectedly aborted a PUT or POST
connection. This problem has been fixed.

This is tracked by the Mitre CVE ID CAN-2005-0718

All SUSE Linux based products were affected.

- xli shell quoting problems
This update of xli fixes a bug in the shell meta-character handling behaviour
while uncompressing image files. This bug can be exploited to execute arbitrary
shell commands. In conjunction with mail-clients it can even be exploited
remotely. Additionally integer overflows while allocating memory were fixed.

This is tracked by the Mitre CVE IDs CAN-2005-0638 and CAN-2005-0639

All SUSE Linux products were affected.

______________________________________________________________________________

2) Pending vulnerabilities in SUSE Distributions and Workarounds:

- perl-Net-Server format string bug
A format string problem was found in the logging routines of the
perl-Net-Server perl module collection.

All SUSE Linux products are affected.

- xine buffer overflow
Buffer overflows in the code used to handle MMST streams or RealMedia
RTSP streams allow remote malicious servers to execute arbitrary code.

This is tracked by the Mitre CVE ID CAN-2005-1195

All SUSE Linux based products are affected.

- kimgio buffer overflows
Buffer overflows in the kimgio library of KDE potentially allows remote attackers to
execute arbitrary code though specially crafted image files.

This is tracked by the Mitre CVE ID CAN-2005-1046

All SUSE Linux based products are affected.

______________________________________________________________________________

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 security@suse.de),
the checksums show proof of the authenticity of the package.
We recommend against subscribing to security lists that cause the
e-mail 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
file name of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an uninstalled 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:

suse-security@suse.com
- general/linux/SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an email to
<suse-security-subscribe@suse.com>.

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
<suse-security-announce-subscribe@suse.com>.

For general information or the frequently asked questions (FAQ)
send mail to:
<suse-security-info@suse.com> or
<suse-security-faq@suse.com> respectively.

====================================================================
SUSE's security contact is <security@suse.com> or <security@suse.de>.
The <security@suse.de> 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 <security@suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>

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