GLSA-200907-13 : PulseAudio: Local privilege escalation

This script is Copyright (C) 2009-2014 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-200907-13
(PulseAudio: Local privilege escalation)

Tavis Ormandy and Julien Tinnes of the Google Security Team discovered
that the pulseaudio binary is installed setuid root, and does not drop
privileges before re-executing itself. The vulnerability has
independently been reported to oCERT by Yorick Koster.

Impact :

A local user who has write access to any directory on the file system
containing /usr/bin can exploit this vulnerability using a race
condition to execute arbitrary code with root privileges.

Workaround :

Ensure that the file system holding /usr/bin does not contain
directories that are writable for unprivileged users.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200907-13.xml

Solution :

All PulseAudio users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=media-sound/pulseaudio-0.9.9-r54'

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
Public Exploit Available : true

Family: Gentoo Local Security Checks

Nessus Plugin ID: 39848 (gentoo_GLSA-200907-13.nasl)

Bugtraq ID:

CVE ID: CVE-2009-1894