sudo allows a system administrator to give users the ability to run commands as other users.
Multiple vulnerabilities have been discovered in sudo:
A local attacker with privileges to use "sudoedit" or the privilege to execute commands with the "runas_default" setting enabled could leverage these vulnerabilities to execute arbitrary code with elevated privileges.
CVE-2010-0426: Revoke all "sudoedit" privileges, or use the full path to sudoedit. CVE-2010-0427: Remove all occurrences of the "runas_default" setting.
All sudo users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/sudo-1.7.2_p4"