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Sicherheit: SUSE Security Summary Report
Aktuelle Meldungen Distributionen
Name: SUSE Security Summary Report
ID: SUSE-SR:2005:004
Distribution: SUSE
Plattformen: Keine Angabe
Datum: Sa, 12. Februar 2005, 12:00
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0155
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0452
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0077
Applikationen: several

Originalnachricht

-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

SUSE Security Summary Report

Announcement-ID: SUSE-SR:2005:004
Date: Friday, Feb 11th 2005 15:00 MEST
Cross References: CAN-2005-0155
CAN-2004-0452
CAN-2005-0077

Content of this advisory:
1) solved security vulnerabilities:
- ruby CGI denial of service
- perl local privilege escalation
- perl-DBI temp race condition
- konversation multiple security fixes

2) pending vulnerabilities, solutions, workarounds:
- problems with kernel update for SUSE Linux 9.1
- IDN cloaking problems with all browsers
- multiple enscript problems
- multiple wget problems

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.


- ruby CGI denial of service

A denial of service attack against the ruby CGI scripts was fixed
which could lead to an endless loop when the connections was
terminated unexpectedly.

All SUSE Linux based products were affected.


- perl local privilege escalation.

SUSE Linux by default does not ship the setuid perl versions set
to setuid root, so if you did not change the permissions, this will
not affect you.

An unchecked variable access in perl debugging could lead a local
attacker to gain root access by either overwriting random system
files or overflowing a buffer on the stack.
This issue is tracked by the Mitre CVE ID CAN-2005-0155.

Additionally a file deletion race was fixed in File::Path::rmtree,
which is tracked by the Mitre CVE ID CAN-2004-0452.

Only SUSE Linux based products with modified permission of
the sperl5.0.x interpreter are affected.


- perl-DBI temp race condition

The Debian Security Audit project found a small temporary file
race condition in the perl DBI module. This has been assigned
the Mitre CVE ID CAN-2005-0077.

All SUSE Linux based products were affected.


- multiple konversation problems

Multiple problems in the konversation messenger client were
found and fixed by Wouter Coekaerts:

- Quick buttons: Sometimes passed strings were evaluated as
QT format strings, leading to potential insertion of commands.

- Included Perl scripts are vulnerable to shell command injection
attacks.

- Nick and password confused in quick connect dialog, potentially
leading to using the password as a nickname.


All SUSE Linux box products were affected.

______________________________________________________________________________

2) Pending vulnerabilities in SUSE Distributions and Workarounds:

- problems with kernel update for SUSE Linux 9.1

Several users of NVidia cards reported problems with the last SUSE
Linux 9.1 kernel update, leaving the screen black and the machine
hung after reboot.

We are working on a fix for this problem.

Up to then our NVidia customers use the OpenSource driver "nv",
not install the last kernel update and/or fall back to the
previous one.


- multiple wget problems

We have still no solution 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.

We are aware of these issues and expect a good solution soon.


- multiple enscript problems

The text to postscript converter enscript has several security
related problems, relating to input validation (CAN-2004-1184),
missing sanitizing of filenames (CAN-2004-1185) and multiple
buffer overflows (CAN-2004-1186). Updates are currently tested.
______________________________________________________________________________

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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