USN-649-1: OpenSSH vulnerabilities

01 October 2008

OpenSSH vulnerabilities




It was discovered that the ForceCommand directive could be bypassed.
If a local user created a malicious ~/.ssh/rc file, they could execute
arbitrary commands as their user id. This only affected Ubuntu 7.10.

USN-355-1 fixed vulnerabilities in OpenSSH. It was discovered that the
fixes for this issue were incomplete. A remote attacker could attempt
multiple logins, filling all available connection slots, leading to a
denial of service. This only affected Ubuntu 6.06 and 7.04.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 7.10
Ubuntu 7.04
Ubuntu 6.06

In general, a standard system upgrade is sufficient to effect the
necessary changes.