=========================================================== Ubuntu Security Notice USN-905-1 February 26, 2010 sudo vulnerabilities CVE-2010-0426, CVE-2010-0427 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 Ubuntu 9.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: sudo 1.6.8p12-1ubuntu6.1 sudo-ldap 1.6.8p12-1ubuntu6.1 Ubuntu 8.04 LTS: sudo 1.6.9p10-1ubuntu3.6 sudo-ldap 1.6.9p10-1ubuntu3.6 Ubuntu 8.10: sudo 1.6.9p17-1ubuntu2.2 sudo-ldap 1.6.9p17-1ubuntu2.2 Ubuntu 9.04: sudo 1.6.9p17-1ubuntu3.1 sudo-ldap 1.6.9p17-1ubuntu3.1 Ubuntu 9.10: sudo 1.7.0-1ubuntu2.1 sudo-ldap 1.7.0-1ubuntu2.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: 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)