USN-355-1: openssh vulnerabilities
02 October 2006
Tavis Ormandy discovered that the SSH daemon did not properly handle
authentication packets with duplicated blocks. By sending specially
crafted packets, a remote attacker could exploit this to cause the ssh
daemon to drain all available CPU resources until the login grace time
Mark Dowd discovered a race condition in the server's signal handling.
A remote attacker could exploit this to crash the server.
The problem can be corrected by updating your system to the following package versions:
- openssh-server - 1:4.2p1-7ubuntu3.1
- openssh-server - 1:4.1p1-7ubuntu4.2
- openssh-server - 1:3.9p1-1ubuntu2.3
In general, a standard system upgrade is sufficient to effect the