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GLSA-200907-13 : PulseAudio: Local privilege escalation

high Nessus Plugin ID 39848

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.

Solution

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

See Also

https://security.gentoo.org/glsa/200907-13

Plugin Details

Severity: High

ID: 39848

File Name: gentoo_GLSA-200907-13.nasl

Version: 1.14

Type: local

Published: 7/17/2009

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:pulseaudio, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/16/2009

Exploitable With

Core Impact

Reference Information

CVE: CVE-2009-1894

CWE: 362

GLSA: 200907-13