Valerio Costamagna discovered that sudo did not properly validate the path for the "sudoedit" pseudo-command when the PATH contained only a dot . If secure_path and ignore_dot were disabled, a local attacker could exploit this to execute arbitrary code as root if sudo was configured to allow the attacker to use sudoedit. By default, secure_path is used and the sudoedit pseudo-command is not used in Ubuntu. This is a different but related issue to CVE-2010-0426.