NVClock: Insecure file usage

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-video/nvclock	< 0.7-r2	>= 0.7-r2	All supported architectures

Related bugreports: #184071

A vulnerability has been discovered in NVClock, allowing for the execution of arbitrary code.

2. Impact Information

NVClock is an utility for changing NVidia graphic chipsets internal frequency.

Tavis Ormandy of the Gentoo Linux Security Team discovered that NVClock makes usage of an insecure temporary file in the /tmp directory.

A local attacker could create a specially crafted temporary file in /tmp to execute arbitrary code with the privileges of the user running NVCLock.

3. Resolution Information

There is no known workaround at this time.

All NVClock users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-video/nvclock-0.7-r2"

4. References

Updated July 24, 2007

Summary: This is a Gentoo Linux Security Advisory

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