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Home » Security Advisories» SUSE » Security summary report

Security summary report

Solved security vulnerabilities: Wine (WMF SETABORTPROC problem), Cups (pdftops various xpdf problems) and Sudo (environment variable problems).


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______________________________________________________________________________

SUSE Security Summary Report

Announcement ID: SUSE-SR:2006:002
Date: Fri, 20 Jan 2006 15:00:00 +0000
Cross-References: CVE-2006-0106, CVE-2005-3191, CVE-2005-3192
CVE-2005-2959, CVE-2006-0151, CVE-2005-4158

Content of this advisory:
1) Solved Security Vulnerabilities:
- wine WMF SETABORTPROC problem
- cups pdftops various xpdf problems
- sudo environment variable problems
2) Pending Vulnerabilities, Solutions, and Work-Arounds:
- various kernel security issues
3) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Solved Security Vulnerabilities

To avoid flooding mailing lists with SUSE Security Announcements for minor
issues, SUSE Security releases weekly summary reports for the low profile
vulnerability fixes. The SUSE Security Summary Reports do not list md5 sums
or download URLs like the SUSE Security Announcements that are released for
more severe vulnerabilities.

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

- wine WMF SETABORTPROC problem

The Windows Metafile format allowed execution code by including
a Escape(SETABORTPROC) record. The free Windows Emulator WINE was
also affected by this problem. If an attacker could convince you
to open/view a prepared metafile he would be able to execute code.

This is tracked by the Mitre CVE ID CVE-2006-0106.

SUSE Linux 9.1 up to 10.0 are affected by this problem.

- cups pdftops various xpdf problems

Integer overflows in the CUPS helper application pdftops (that
contains xpdf code) potentially allowed to execute arbitrary code
via specially crafted PDF files

The PDF issues are tracked by CVE-2005-3191, CVE-2005-3192, all
SUSE Linux based products were affected.

- sudo environment variable problems

The fixes for CVE-2005-2959, CVE-2006-0151, and CVE-2005-4158
extend the sudo internal environment variable blacklist to prevent
interpretation of those variables by the bash shell.

In our opinion a blacklist based approach to improve security is
doomed to fail. If you use sudo to grant limited super user access
to regular users you should rather configure sudo to clean the entire
environment by setting the options env_reset and always_set_home.
We will therefore not release security updates for the sole purpose
of extending the blacklist.

Further products will use the env_reset and always_set_home options.
______________________________________________________________________________

2) Pending Vulnerabilities, Solutions, and Work-Arounds

- Kernel security issues

Various kernel security issues are known and we will start preparing
updates soon.
The next kernel update will probably be available mid of February.
______________________________________________________________________________

3) Authenticity Verification and Additional Information

- Announcement authenticity verification:

SUSE security announcements are published via mailing lists and on Web
sites. The authenticity and integrity of a SUSE security announcement is
guaranteed by a cryptographic signature in each announcement. All SUSE
security announcements are published with a valid signature.

To verify the signature of the announcement, save it as text into a file
and run the command

gpg --verify

replacing with the name of the file containing the announcement.
The output for a valid signature looks like:

gpg: Signature made using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team "

where is replaced by the date the document was signed.

If the security team's key is not contained in your key ring, you can
import it from the first installation CD. To import the key, use the
command

gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

- Package authenticity verification:

SUSE update packages are available on many mirror FTP servers all over the
world. While this service is considered valuable and important to the free
and open source software community, the authenticity and integrity of a
package needs to be verified to ensure that it has not been tampered with.

The internal 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, replacing with the
filename of the RPM package downloaded. The package is unmodified if it
contains a valid signature from [email protected] with the key ID 9C800ACA.

This key is automatically imported into the RPM database (on RPMv4-based
distributions) and the gpg key ring of 'root' during installation. You can
also find it on the first installation CD and included at the end of this
announcement.

- SUSE runs two security mailing lists to which any interested party may
subscribe:

[email protected]
- General Linux and SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an e-mail to
.

[email protected]
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an e-mail to
.

For general information or the frequently asked questions (FAQ)
send mail to or
.

=====================================================================
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, the
clear text signature should show proof of the authenticity of the text.

SUSE Linux Products GmbH provides 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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