GLSA-200501-02 : a2ps: Multiple vulnerabilities

This script is Copyright (C) 2005-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200501-02
(a2ps: Multiple vulnerabilities)

Javier Fernandez-Sanguino Pena discovered that the a2ps package
contains two scripts that create insecure temporary files (fixps and
psmandup). Furthermore, we fixed in a previous revision a vulnerability
in a2ps filename handling (CAN-2004-1170).

Impact :

A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When
fixps or psmandup is executed, this would result in the file being
overwritten with the rights of the user running the utility. By
enticing a user or script to run a2ps on a malicious filename, an
attacker could execute arbitrary commands on the system with the rights
of that user or script.

Workaround :

There is no known workaround at this time.

See also :

http://secunia.com/advisories/13641/
http://www.nessus.org/u?64a41836
http://www.gentoo.org/security/en/glsa/glsa-200501-02.xml

Solution :

All a2ps users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-text/a2ps-4.13c-r2'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 16393 (gentoo_GLSA-200501-02.nasl)

Bugtraq ID:

CVE ID: CVE-2004-1170
CVE-2004-1377