While trying to get Kerberos credentials, cifs.upcall program from the cifs-utils package makes an upcall to the wrong namespace in containerized environments. This may lead to a disclosure of sensitive data from the host's Kerberos credentials cache.

Sebastian Krahmer discovered a stack-based buffer overflow flaw in cifskey.c, which is used by pamcifscreds.

A patch is available from the following: https://bugzilla.novell.com/showbug.cgi?id=870168

References: http://seclists.org/oss-sec/2014/q2/66

It was found that cifs-utils' mount.cifs was invoking a shell when requesting the Samba password, which could be used to inject arbitrary commands. An attacker able to invoke mount.cifs with special permission, such as via sudo rules, could use this flaw to escalate their privileges.

A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.

cifs-utils through 6.14, with verbose logging, can cause an information leak when a file contains = (equal sign) characters but is not a valid credentials file.

In cifs-utils through 6.14, a stack-based buffer overflow when parsing the mount.cifs ip= command-line argument could lead to local attackers gaining root privileges.