GLSA-200710-11 : X Font Server: Multiple Vulnerabilities

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-200710-11
(X Font Server: Multiple Vulnerabilities)

iDefense reported that the xfs init script does not correctly handle a
race condition when setting permissions of a temporary file
(CVE-2007-3103). Sean Larsson discovered an integer overflow
vulnerability in the build_range() function possibly leading to a
heap-based buffer overflow when handling 'QueryXBitmaps' and
'QueryXExtents' protocol requests (CVE-2007-4568). Sean Larsson also
discovered an error in the swap_char2b() function possibly leading to a
heap corruption when handling the same protocol requests
(CVE-2007-4990).

Impact :

The first issue would allow a local attacker to change permissions of
arbitrary files to be world-writable by performing a symlink attack.
The second and third issues would allow a local attacker to execute
arbitrary code with privileges of the user running the X Font Server,
usually xfs.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200710-11.xml

Solution :

All X Font Server users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=x11-apps/xfs-1.0.5'

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
Public Exploit Available : true

Family: Gentoo Local Security Checks

Nessus Plugin ID: 27046 (gentoo_GLSA-200710-11.nasl)

Bugtraq ID:

CVE ID: CVE-2007-3103
CVE-2007-4568
CVE-2007-4990