SUSE Security Summary Report SUSE-SR:2005:008
Posted on: 03/19/2005 05:36 AM

A Security Summary from SUSE:

______________________________________________________________________________

SUSE Security Summary Report

Announcement-ID: SUSE-SR:2005:008
Date: Fri, 18 Mar 2005 15:00:00 +0000
Cross References: CAN-2005-0665
CAN-2004-1491
CAN-2004-0888
CAN-2004-0889
CAN-2004-1125
CAN-2005-0064
CAN-2005-0239

Content of this advisory:
1) solved security vulnerabilities:
- xv format string problem
- opera arbitrary code execution
- apache2 ssl remote denial of service
- koffice xpdf related problems
- squirrelmail-plugins
- clamav update
- Mozilla Firefox IDN update correction

2) pending vulnerabilities, solutions, workarounds:
- kernel security update
- wget directory traversal problem
- IDN domain name cloaking problems
- PostgreSQL problems.
- new mysql vulnerabilities

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.

- xv format string problem

This update fixes a format string bug in the file name handling of
xv. This is tracked by the Mitre CVE ID CAN-2005-0665.

All SUSE Linux products are affected.

- opera arbitrary code execution

Opera 7.54 and earlier used kfmclient exec to handle unknown MIME
types, which allows remote attackers to execute arbitrary code via
a shortcut or launcher that contains an Exec entry. This is tracked
by the Mitre CVE ID CAN-2004-1491.

All SUSE Linux products are affected.

- Apache2 remote denial of service

This update fixes a problem in the SSL handling of Apache2 which could
be used by an remote attacker to crash Apache2 instances.

The problem was fixed in the 2.0.50 upstream Apache2 version, this
backports the fix.

SUSE Linux Version 8.2 to 9.1 and SUSE Linux Enterprise Server 9
are affected by this problem.

- koffice has xpdf related problems

This update of koffice includes various fixes in the xpdf-based code,
fixing earlier xpdf vulnerabilities.

These are tracked by the Mitre CVE IDs CAN-2004-0888, CAN-2004-0889,
CAN-2004-1125, and CAN-2005-0064.

All SUSE Linux based products containing koffice are affected.


- squirrelmail-plugins

This update fixes a command injection vulnerability in squirrelmail's
S/MIME Plugin which could be exploited remotely to execute arbitrary
commands with the privileges of the web server.
This issue is tracked by the Mitre CVE ID CAN-2005-0239.

All SUSE Linux Box products are affected.


- clamav

This clamav virus scanner was updated to version 0.83. The update
fixes the following clamav problems:

Due to a high number of bad files produced by broken software, the
MS05-002 exploit detector now only checks specific RIFF files. This
version also fixes a stability problem of clamav-milter/clamd and
improves E-Mail scanning.


- Mozilla Firefox IDN update correction

We incorrectly wrote that Mozilla Firefox shows both puny code
and IDN names. This is incorrect.

We use the official Firefox upstream fix, that only shows the puny
code.
______________________________________________________________________________

2) Pending vulnerabilities in SUSE Distributions and Workarounds:

- New kernel security problems

New kernel security problems in regards to signedness issues have
been spotted by Georgi Guninski.

We are working on updates for these and other collected kernel security
problems and expect a release before the easter holidays.


- multiple wget problems

We are still working on updated packages for the wget issues as
reported on Bugtraq:
http://www.securityfocus.com/archive/1/383998


- IDN (Internationalized Domain Name) cloaking / homograph attacks

Problems with the IDN / punycode handling that allows non-ASCII
domain names were reported for every browser.

- The KDE approach is currently filtering on the top level domain.
- The Mozilla approach is currently to display punycode.

We have released Mozilla Firefox updates for this problem, the others
are still pending.


- PostgreSQL problems

Additional PostgreSQL problems were reported:
- A local user could bypass the EXECUTE permission check for
functions by using the CREATE AGGREGATE command. CAN-2005-0244

- Other earlier listed problems are already fixed.

We are working on updates for this problem.


- New MySQL problems

Problems in UserDefined function handling have been found in MySQL
that could lead to remote attackers executing code in the mysql
server (by using SQL insertion attacks).

We are working on updates for this problem.

______________________________________________________________________________

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 lt;name-of-the-file.rpmgt;
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 lt;file.rpmgt;
to verify the signature of the package, where lt;file.rpmgt; 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 lt; 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
lt;suse-security-subscribe@suse.comgt;.

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
lt;suse-security-announce-subscribe@suse.comgt;.

For general information or the frequently asked questions (FAQ)
send mail to:
lt;suse-security-info@suse.comgt; or
lt;suse-security-faq@suse.comgt; respectively.

====================================================================
SUSE's security contact is lt;security@suse.comgt; or lt;security@suse.degt;.
@suse.degt;.
The lt;security@suse.degt; 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 lt;security@suse.degt;
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key lt;build@suse.degt;

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