USN-1442-1: Sudo vulnerability
Ubuntu Security Notice USN-1442-1
16th May, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Sudo could allow users to run arbitrary programs as the administrator.
- sudo - Provide limited super user privileges to specific users
It was discovered that sudo incorrectly handled network masks when using Host
and Host_List. A local user who is listed in sudoers may be allowed to run
commands on unintended hosts when IPv4 network masks are used to grant access.
A local attacker could exploit this to bypass intended access restrictions. Host
and Host_List are not used in the default installation of Ubuntu.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.04 LTS:
- sudo-ldap 1.8.3p1-1ubuntu3.2
- sudo 1.8.3p1-1ubuntu3.2
- Ubuntu 11.10:
- sudo-ldap 1.7.4p6-1ubuntu2.1
- sudo 1.7.4p6-1ubuntu2.1
- Ubuntu 11.04:
- sudo-ldap 1.7.4p4-5ubuntu7.2
- sudo 1.7.4p4-5ubuntu7.2
- Ubuntu 10.04 LTS:
- sudo-ldap 1.7.2p1-1ubuntu5.4
- sudo 1.7.2p1-1ubuntu5.4
- Ubuntu 8.04 LTS:
- sudo-ldap 1.6.9p10-1ubuntu3.9
- sudo 1.6.9p10-1ubuntu3.9
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.