From: Secunia Security Advisories (sec-advsecunia.com)
Date: Mon Dec 27 2004 - 03:20:33 CST

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

TITLE:
GNU a2ps Two Scripts Insecure Temporary File Creation

SECUNIA ADVISORY ID:
SA13641

VERIFY ADVISORY:
http://secunia.com/advisories/13641/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
GNU a2ps 4.x
http://secunia.com/product/3837/

DESCRIPTION:
Javier Fernández-Sanguino Peña has reported two vulnerabilities in
GNU a2ps, which can be exploited by malicious, local users to perform
certain actions on a vulnerable system with escalated privileges.

The vulnerabilities are caused due to the fixps.in and psmandup.in
scripts creating temporary files insecurely. This can be exploited
via symlink attacks to overwrite arbitrary files with the privileges
of the user running a vulnerable script.

The vulnerabilities have been reported in version 4.13b. Other
versions may also be affected.

SOLUTION:
Don't use the two vulnerable scripts.

Grant only trusted users access to affected systems.

PROVIDED AND/OR DISCOVERED BY:
Javier Fernández-Sanguino Peña

----------------------------------------------------------------------

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.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories

----------------------------------------------------------------------

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]