openafs - potential code execution

Two vulnerabilities were discovered in the client part of OpenAFS, a
distributed file system.

• CVE-2009-1251
  An attacker with control of a file server or the ability to forge RX
  packets may be able to execute arbitrary code in kernel mode on an
  OpenAFS client, due to a vulnerability in XDR array decoding.
• CVE-2009-1250
  An attacker with control of a file server or the ability to forge RX
  packets may crash OpenAFS clients because of wrongly handled error
  return codes in the kernel module.

Note that in order to apply this security update, you must rebuild the
OpenAFS kernel module. Be sure to also upgrade openafs-modules-source,
build a new kernel module for your system following the instructions in
/usr/share/doc/openafs-client/README.modules.gz, and then either stop
and restart openafs-client or reboot the system to reload the kernel
module.

For the old stable distribution (etch), these problems have been fixed
in version 1.4.2-6etch2.

For the stable distribution (lenny), these problems have been fixed in
version 1.4.7.dfsg1-6+lenny1.

For the unstable distribution (sid), these problems have been fixed in
version 1.4.10+dfsg1-1.

We recommend that you upgrade your openafs packages.