USN-905-1: sudo vulnerabilities
26 February 2010
sudo vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.10
- Ubuntu 9.04
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS
Software Description
- sudo
Details
It was discovered that sudo did not properly validate the path for the ‘sudoedit’ pseudo-command. A local attacker could exploit this to execute arbitrary code as root if sudo was configured to allow the attacker to use sudoedit. The sudoedit pseudo-command is not used in the default installation of Ubuntu. (CVE-2010-0426)
It was discovered that sudo did not reset group permissions when the ‘runas_default’ configuration option was used. A local attacker could exploit this to escalate group privileges if sudo was configured to allow the attacker to run commands under the runas_default account. The runas_default configuration option is not used in the default installation of Ubuntu. This issue affected Ubuntu 8.04 LTS, 8.10 and 9.04. (CVE-2010-0427)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 9.10
- sudo - 1.7.0-1ubuntu2.1
- sudo-ldap - 1.7.0-1ubuntu2.1
- Ubuntu 9.04
- sudo - 1.6.9p17-1ubuntu3.1
- sudo-ldap - 1.6.9p17-1ubuntu3.1
- Ubuntu 8.10
- sudo - 1.6.9p17-1ubuntu2.2
- sudo-ldap - 1.6.9p17-1ubuntu2.2
- Ubuntu 8.04 LTS
- sudo - 1.6.9p10-1ubuntu3.6
- sudo-ldap - 1.6.9p10-1ubuntu3.6
- Ubuntu 6.06 LTS
- sudo - 1.6.8p12-1ubuntu6.1
- sudo-ldap - 1.6.8p12-1ubuntu6.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the necessary changes.