USN-649-1: OpenSSH vulnerabilities

Releases

• Ubuntu 7.10
• Ubuntu 7.04
• Ubuntu 6.06

Packages

• openssh -

Details

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.
(CVE-2008-1657)

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.
(CVE-2008-4109)

Update instructions

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

Ubuntu 7.10

• openssh-server - 1:4.6p1-5ubuntu0.6

Ubuntu 7.04

• openssh-server - 1:4.3p2-8ubuntu1.5

Ubuntu 6.06

• openssh-server - 1:4.2p1-7ubuntu3.5

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

References

• CVE-2008-1657
• CVE-2008-4109