1. Ubuntu Security Notices
  2. USN-1309-1

USN-1309-1: DHCP vulnerability

Publication date

15 December 2011

Overview

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

Releases

Packages

Details

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
11.10 oneiric isc-dhcp-server –  4.1.1-P1-17ubuntu10.1
11.04 natty isc-dhcp-server –  4.1.1-P1-15ubuntu9.3

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References

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