Ubuntu 9.10 / 10.04 LTS / 10.10 : dhcp3 vulnerability (USN-1108-2)

High Nessus Plugin ID 55067


The remote Ubuntu host is missing a security-related patch.


USN-1108-1 fixed vulnerabilities in DHCP. Due to an error, the patch to fix the vulnerability was not properly applied on Ubuntu 9.10 and higher. This update fixes the problem.

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.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected dhcp3-client package.

Plugin Details

Severity: High

ID: 55067

File Name: ubuntu_USN-1108-2.nasl

Version: $Revision: 1.8 $

Type: local

Agent: unix

Published: 2011/06/13

Modified: 2016/05/27

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:dhcp3-client, cpe:/o:canonical:ubuntu_linux:10.04:-:lts, cpe:/o:canonical:ubuntu_linux:10.10, cpe:/o:canonical:ubuntu_linux:9.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2011/04/19

Exploitable With


Reference Information

CVE: CVE-2011-0997

BID: 47176

USN: 1108-2