[USN-1309-1] DHCP vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Thu Dec 15 15:31:57 UTC 2011

Ubuntu Security Notice USN-1309-1
December 15, 2011

isc-dhcp vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.10
- Ubuntu 11.04


DHCP could be made to crash if it received specially crafted network

Software Description:
- isc-dhcp: DHCP server and client


It was discovered that the DHCP server incorrectly handled certain
malformed packets when configured to evaluate regular expressions. A remote
attacker could use this issue to cause DHCP to crash, resulting in a denial
of service.

Update instructions:

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

Ubuntu 11.10:
  isc-dhcp-server                 4.1.1-P1-17ubuntu10.1

Ubuntu 11.04:
  isc-dhcp-server                 4.1.1-P1-15ubuntu9.3

In general, a standard system update will make all the necessary changes.


Package Information:

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