openvpn - denial of service

Several security related problems have been discovered in openvpn, a
Virtual Private Network daemon. The Common Vulnerabilities and
Exposures project identifies the following problems:

• CAN-2005-2531
  Wrong processing of failed certificate authentication when running
  with “verb 0” and without TLS authentication can lead to a denial
  of service by disconnecting the wrong client.
• CAN-2005-2532
  Wrong handling of packets that can’t be decrypted on the server
  can lead to the disconnection of unrelated clients.
• CAN-2005-2533
  When running in “dev tap” Ethernet bridging mode, openvpn can
  exhaust its memory by receiving a large number of spoofed MAC
  addresses and hence denying service.
• CAN-2005-2534
  Simultaneous TCP connections from multiple clients with the same
  client certificate can cause a denial of service when
  --duplicate-cn is not enabled.

The old stable distribution (woody) does not contain openvpn packages.

For the stable distribution (sarge) these problems have been fixed in
version 2.0-1sarge1.

For the unstable distribution (sid) these problems have been fixed in
version 2.0.2-1.

We recommend that you upgrade your openvpn package.