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Category:   Application (Generic)  >   Util-linux Vendors:   kernel.org
Util-linux mount/umount Privilege Bug Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1018782
SecurityTracker URL:  http://securitytracker.com/id/1018782
CVE Reference:   CVE-2007-5191   (Links to External Site)
Date:  Oct 9 2007
Impact:   Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Util-linux. A local user can obtain elevated privileges on the target system.

The mount and umount functions do not properly drop permissions after calling set user id (setuid) and set group id (setgid) helper functions, such as 'mount.nfs'.

A local user can exploit this to execute arbitrary commands on the target system with elevated privileges.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   A source code fix is available.

The vendor's advisory is available at:

http://git.kernel.org/?p=utils/util-linux-ng/util-linux-ng.git;a=commit;h=ebbeb2c7ac1b00b6083905957837a271e80b187e

Cause:   Access control error, State error
Underlying OS:  Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Nov 16 2007 (Red Hat Issues Fix) Util-linux mount/umount Privilege Bug Lets Local Users Gain Elevated Privileges
Red Hat has released a fix for Red Hat Enterprise Linux 3, 4, and 5.
Jan 8 2008 (VMware Issues Fix) Util-linux mount/umount Privilege Bug Lets Local Users Gain Elevated Privileges
VMware has issued a fix for ESX Server 3.0.1 and 3.0.2.



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