mount.cifs in Samba 3.0 before 3.0.37, 3.2 before 3.2.15, 3.3 before 3.3.8 and 3.4 before 3.4.2, when mount.cifs is installed suid root, does not properly enforce permissions, which allows local users to read part of the credentials file and obtain the password by specifying the path to the credentials file and using the --verbose or -v option.
https://www.redhat.com/archives/fedora-package-announce/2009-October/msg00098.html
https://www.redhat.com/archives/fedora-package-announce/2009-October/msg00095.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/53574
http://www.ubuntu.com/usn/USN-839-1
http://www.securityfocus.com/bid/36572
http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.561439
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00004.html