Joined: 12 May 2004
|Posted: Thu Jul 16, 2009 3:26 pm Post subject: [ GLSA 200907-13 ] PulseAudio: Local privilege escalation
|Gentoo Linux Security Advisory
Title: PulseAudio: Local privilege escalation (GLSA 200907-13)
Date: July 16, 2009
A vulnerability in PulseAudio may allow a local user to execute code with
PulseAudio is a network-enabled sound server with an advanced plug-in
Vulnerable: < 0.9.9-r54
Unaffected: >= 0.9.9-r54
Architectures: All supported architectures
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.
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.
Ensure that the file system holding /usr/bin does not contain
directories that are writable for unprivileged users.
All PulseAudio users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/pulseaudio-0.9.9-r54"
Last edited by GLSA on Wed Jun 27, 2012 4:27 am; edited 2 times in total