BEAST: Denial of Service
Gentoo Linux Security Advisory
||GLSA 200704-22 / BEAST
||April 27, 2007
||April 27, 2007: 01
All supported architectures
A vulnerability has been discovered in BEAST allowing for a Denial of
BEdevilled Audio SysTem is an audio compositor, supporting a wide range
of audio formats.
BEAST, which is installed as setuid root, fails to properly check
whether it can drop privileges accordingly if seteuid() fails due to a
user exceeding assigned resource limits.
A local user could exceed his resource limit in order to prevent the
seteuid() call from succeeding. This may lead BEAST to keep running
with root privileges. Then, the local user could use the "save as"
dialog box to overwrite any file on the vulnerable system, potentially
leading to a Denial of Service.
There is no known workaround at this time.
All BEAST users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/beast-0.7.1"