The pa_make_secure_dir function in core-util.c in PulseAudio 0.9.10 and 0.9.19 allows local users to change the ownership and permissions of arbitrary files via a symlink attack on a /tmp/.esd-##### temporary file.
https://bugs.edge.launchpad.net/ubuntu/+source/pulseaudio/+bug/509008
http://www.vupen.com/english/advisories/2010/1570
http://www.mandriva.com/security/advisories?name=MDVSA-2010:124
http://www.debian.org/security/2010/dsa-2017
http://git.0pointer.de/?p=pulseaudio.git%3Ba=patch%3Bh=d3efa43d85ac132c6a5a416a2b6f2115f5d577ee