PulseAudio: Local privilege escalation
Gentoo Linux Security Advisory
||GLSA 200907-13 / pulseaudio
||July 16, 2009
||July 16, 2009: 01
All supported architectures
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
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:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/pulseaudio-0.9.9-r54"