GLSA-200710-16 : X.Org X server: Composite local privilege escalation

This script is Copyright (C) 2007-2014 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-200710-16
(X.Org X server: Composite local privilege escalation)

Aaron Plattner discovered a buffer overflow in the compNewPixmap()
function when copying data from a large pixel depth pixmap into a
smaller pixel depth pixmap.

Impact :

A local attacker could execute arbitrary code with the privileges of
the user running the X server, typically root.

Workaround :

Disable the Composite extension by setting ' Option 'Composite'
'disable' ' in the Extensions section of xorg.conf.
Note: This could affect the functionality of some applications.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200710-16.xml

Solution :

All X.Org X server users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=x11-base/xorg-server-1.3.0.0-r1'

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 27051 (gentoo_GLSA-200710-16.nasl)

Bugtraq ID:

CVE ID: CVE-2007-4730