USN-2146-1: Sudo vulnerabilities
13 March 2014
sudo vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 13.10
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
Summary
Several security issues were fixed in Sudo.
Software Description
- sudo - Provide limited super user privileges to specific users
Details
Sebastien Macke discovered that Sudo incorrectly handled blacklisted environment variables when the env_reset option was disabled. A local attacker could use this issue to possibly run unintended commands by using blacklisted environment variables. In a default Ubuntu installation, the env_reset option is enabled by default. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. (CVE-2014-0106)
It was discovered that the Sudo init script set a date in the past on existing timestamp files instead of using epoch to invalidate them completely. A local attacker could possibly modify the system time to attempt to reuse timestamp files. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 12.10 and Ubuntu 13.10. (LP: #1223297)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 13.10
- sudo - 1.8.6p3-0ubuntu3.1
- sudo-ldap - 1.8.6p3-0ubuntu3.1
- Ubuntu 12.10
- sudo - 1.8.5p2-1ubuntu1.2
- sudo-ldap - 1.8.5p2-1ubuntu1.2
- Ubuntu 12.04 LTS
- sudo - 1.8.3p1-1ubuntu3.6
- sudo-ldap - 1.8.3p1-1ubuntu3.6
- Ubuntu 10.04 LTS
- sudo - 1.7.2p1-1ubuntu5.7
- sudo-ldap - 1.7.2p1-1ubuntu5.7
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.