1. Ubuntu Security Notices
  2. USN-1108-1

USN-1108-1: DHCP vulnerability

Publication date

11 April 2011

Overview

An attacker’s DHCP server could send crafted responses to your computer and cause it to run programs as root.

Releases

Packages

Details

Sebastian Krahmer discovered that the dhclient utility incorrectly filtered
crafted responses. An attacker could use this flaw with a malicious DHCP
server to execute arbitrary code, resulting in root privilege escalation.

Sebastian Krahmer discovered that the dhclient utility incorrectly filtered
crafted responses. An attacker could use this flaw with a malicious DHCP
server to execute arbitrary code, resulting in root privilege escalation.

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
9.10 karmic dhcp3-client –  3.1.2-1ubuntu7.2
8.04 hardy dhcp3-client –  3.0.6.dfsg-1ubuntu9.2
6.06 dapper dhcp3-client –  3.0.3-6ubuntu7.2
10.10 maverick dhcp3-client –  3.1.3-2ubuntu6.1
10.04 lucid dhcp3-client –  3.1.3-2ubuntu3.1

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References

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