Secunia

Some security issues have been reported in the Linux Kernel, which can be exploited by malicious, local users to bypass certain security restrictions, to gain escalated privileges, or to cause a DoS (Denial of Service).

1) The USBLCD driver does not limit the memory consumption during writes to the device. This can be exploited to cause an out-of-memory condition by writing a large amount of data to an affected device.

Successful exploitation requires write access to a device using the driver.

2) An error in the implementation of the "sys_setrlimit()" system call can be exploited to bypass CPU time limits by setting RLIMIT_CPU to 0.

3) An error in the "ftruncate()" functionality can be exploited to potentially gain escalated group privileges by creating a file in a setgid directory.

Solution
Update to version 2.6.22.

Provided and/or discovered by
1) Reported by the vendor.
2) Reported by David Peer in a Zsh bug report.
3) Reported by David Watson in a kernel bug report.

Changelog
Further details available in Customer Area

Original Advisory
1) http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.22-rc7
2) http://www.zsh.org/mla/workers/2007/msg00200.html
3) http://bugzilla.kernel.org/show_bug.cgi?id=8420

Deep Links
Links available in Customer Area