Berkeley MPEG Tools: Multiple insecure temporary files
Gentoo Linux Security Advisory
||GLSA 200510-02 / MPEG Tools
||October 03, 2005
||October 03, 2005: 01
All supported architectures
The Berkeley MPEG Tools use temporary files in various insecure ways,
potentially allowing a local user to overwrite arbitrary files.
The Berkeley MPEG Tools are a collection of utilities for
manipulating MPEG video technology, including an encoder (mpeg_encode)
and various conversion utilities.
Mike Frysinger of the Gentoo Security Team discovered that
mpeg_encode and the conversion utilities were creating temporary files
with predictable or fixed filenames. The 'test' make target of the MPEG
Tools also relied on several temporary files created insecurely.
A local attacker could create symbolic links in the temporary
files directory, pointing to a valid file somewhere on the filesystem.
When the utilities are executed (or 'make test' is run), this would
result in the file being overwritten with the rights of the user
running the command.
There is no known workaround at this time.
All Berkeley MPEG Tools users should upgrade to the latest
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-video/mpeg-tools-1.5b-r2"