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Pulseaudio: Privilege escalation


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200802-07 / pulseaudio
Release Date February 13, 2008
Latest Revision February 13, 2008: 01
Impact high
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
media-sound/pulseaudio < 0.9.9 >= 0.9.9 All supported architectures

Related bugreports: #207214


A vulnerability in pulseaudio may allow a local user to execute actions with escalated privileges.

2.  Impact Information


Pulseaudio is a networked sound server with an advanced plugin system.


Marcus Meissner from SUSE reported that the pa_drop_root() function does not properly check the return value of the system calls setuid(), seteuid(), setresuid() and setreuid() when dropping its privileges.


A local attacker could cause a resource exhaustion to make the system calls fail, which would cause Pulseaudio to run as root. The attacker could then perform actions with root privileges.

3.  Resolution Information


There is no known workaround at this time.


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"

4.  References


Page updated February 13, 2008

Summary: This is a Gentoo Linux Security Advisory

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