Ubuntu Security Notice USN-1046-1
20th January, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 9.10
Under certain circumstances, sudo could be made to run programs without a password.
- sudo - Provide limited super user privileges to specific users
Alexander Kurtz discovered that sudo would not prompt for a password when
a group was specified in the Runas_Spec. A local attacker could exploit
this to execute arbitrary code as the specified group if sudo was
configured to allow the attacker to use a program as this group. The group
Runas_Spec is not used in the default installation of Ubuntu.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 10.10:
- sudo-ldap 1.7.2p7-1ubuntu2.1
- sudo 1.7.2p7-1ubuntu2.1
- Ubuntu 10.04 LTS:
- sudo-ldap 1.7.2p1-1ubuntu5.3
- sudo 1.7.2p1-1ubuntu5.3
- Ubuntu 9.10:
- sudo-ldap 1.7.0-1ubuntu2.6
- sudo 1.7.0-1ubuntu2.6
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.