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Pulseaudio: Privilege escalation

Content:

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

Synopsis

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

2.  Impact Information

Background

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

Description

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.

Impact

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

Workaround

There is no known workaround at this time.

Resolution

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



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Page updated February 13, 2008

Summary: This is a Gentoo Linux Security Advisory

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