Marcus Meissner discovered that the PulseAudio sound server performed insufficient checks when dropping privileges, which could lead to local privilege escalation.
The old stable distribution (sarge) doesn't contain pulseaudio.
For the stable distribution (etch), this problem has been fixed in version 0.9.5-5etch1.
We recommend that you upgrade your pulseaudio packages.
MD5 checksums of the listed files are available in the original advisory.