GLSA 200510-02: Berkeley MPEG Tools: Multiple insecure temporary files

http://security.gentoo.org/

Severity:	normal
Title:	Berkeley MPEG Tools: Multiple insecure temporary files
Date:	10/03/2005
Bugs:	#107344
ID:	200510-02

Synopsis

The Berkeley MPEG Tools use temporary files in various insecure ways, potentially allowing a local user to overwrite arbitrary files.

Background

The Berkeley MPEG Tools are a collection of utilities for manipulating MPEG video technology, including an encoder (mpeg_encode) and various conversion utilities.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
media-video/mpeg-tools	< 1.5b-r2	>= 1.5b-r2	All supported architectures

Description

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.

Impact

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.

Workaround

There is no known workaround at this time.

Resolution

All Berkeley MPEG Tools users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-video/mpeg-tools-1.5b-r2"

References

CAN-2005-3115

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200510-02.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.