==========================================================================
Ubuntu Security Notice USN-1442-1
May 16, 2012
sudo vulnerability
==========================================================================
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
Summary:
Sudo could allow users to run arbitrary programs as the administrator.
Software Description:
- sudo: Provide limited super user privileges to specific users
Details:
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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 LTS:
sudo 1.8.3p1-1ubuntu3.2
sudo-ldap 1.8.3p1-1ubuntu3.2
Ubuntu 11.10:
sudo 1.7.4p6-1ubuntu2.1
sudo-ldap 1.7.4p6-1ubuntu2.1
Ubuntu 11.04:
sudo 1.7.4p4-5ubuntu7.2
sudo-ldap 1.7.4p4-5ubuntu7.2
Ubuntu 10.04 LTS:
sudo 1.7.2p1-1ubuntu5.4
sudo-ldap 1.7.2p1-1ubuntu5.4
Ubuntu 8.04 LTS:
sudo 1.6.9p10-1ubuntu3.9
sudo-ldap 1.6.9p10-1ubuntu3.9
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1442-1
CVE-2012-2337
Package Information:
https://launchpad.net/ubuntu/+source/sudo/1.8.3p1-1ubuntu3.2
https://launchpad.net/ubuntu/+source/sudo/1.7.4p6-1ubuntu2.1
https://launchpad.net/ubuntu/+source/sudo/1.7.4p4-5ubuntu7.2
https://launchpad.net/ubuntu/+source/sudo/1.7.2p1-1ubuntu5.4
https://launchpad.net/ubuntu/+source/sudo/1.6.9p10-1ubuntu3.9
