Joined: 12 May 2004
|Posted: Wed Feb 13, 2008 11:26 pm Post subject: [ GLSA 200802-07 ] Pulseaudio: Privilege escalation
|Gentoo Linux Security Advisory
Title: Pulseaudio: Privilege escalation (GLSA 200802-07)
Date: February 13, 2008
A vulnerability in pulseaudio may allow a local user to execute actions with escalated privileges.
Pulseaudio is a networked sound server with an advanced plugin system.
Vulnerable: < 0.9.9
Unaffected: >= 0.9.9
Architectures: All supported architectures
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.
There is no known workaround at this time.
All Pulseaudio users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/pulseaudio-0.9.9"