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TITLE:
rxvt X11 Display Security Issue

SECUNIA ADVISORY ID:
SA29576

VERIFY ADVISORY:
http://secunia.com/advisories/29576/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
rxvt 2.7.x
http://secunia.com/product/1134/

DESCRIPTION:
Bernhard R. Link has reported a security issue in rxvt, which can be
exploited by malicious, local users to gain escalated privileges.

The security issue is caused due to the program using ":0" as it's
X11 display if the DISPLAY environment variable is missing. This can
be exploited to execute arbitrary commands with the privileges of the
user running rxvt via a malicious X server.

The security issue is reported in version 2.6.4. Other versions may
also be affected.

SOLUTION:
Do not run rxvt on untrusted systems.

Restrict local access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Bernhard R. Link

ORIGINAL ADVISORY:
http://article.gmane.org/gmane.comp.security.oss.general/122

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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