Multiple vulnerabilities were discovered and corrected in pam: The pam_xauth module did not verify the return values of the setuid and setgid system calls. A local, unprivileged user could use this flaw to execute the xauth command with root privileges and make it read an arbitrary input file . The pam_mail module used root privileges while accessing users" files. In certain configurations, a local, unprivileged user could use this flaw to obtain limited information about files or directories that they do not have access to . The pam_namespace module executed the external script namespace.init with an unchanged environment inherited from an application calling PAM. In cases where such an environment was untrusted , a local, unprivileged user could possibly use this flaw to escalate their privileges . Packages for 2009.0 are provided as of the Extended Maintenance Program