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USN-531-2: dhcp vulnerability

23 October 2007

dhcp vulnerability




USN-531-1 fixed vulnerabilities in dhcp. The fixes were incomplete,
and only reduced the scope of the vulnerability, without fully solving
it. This update fixes the problem.

Original advisory details:

Nahuel Riva and Gerardo Richarte discovered that the DHCP server did not
correctly handle certain client options. A remote attacker could send
malicious DHCP replies to the server and execute arbitrary code.

Update instructions

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

Ubuntu 7.10
Ubuntu 7.04
Ubuntu 6.10
Ubuntu 6.06

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


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