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Category:   Application (Generic)  >   Util-linux Vendors:   [Multiple Authors/Vendors]
util-linux 'umount' NULL Dereference Lets Local Users Obtain Memory Contents
SecurityTracker Alert ID:  1017729
SecurityTracker URL:  http://securitytracker.com/id/1017729
CVE Reference:   CVE-2007-0822   (Links to External Site)
Date:  Mar 7 2007
Impact:   Disclosure of system information
Exploit Included:  Yes  

Description:   A vulnerability was reported in util-linux. A local user can obtain system memory contents.

A remote user can can invoke umount with a pathname for a USB pen drive that was mounted and subsequently physically removed to trigger a NULL dereference, crashing the application. This may allow the local user to obtain potentially sensitive system memory contents.

The original advisory is available at:

http://gotfault.wordpress.com/2007/01/18/umount-bug/

Carlos Barros reported this vulnerability.

Impact:   A remote user can obtain portions of system memory.
Solution:   No solution was available at the time of this entry.
Cause:   Access control error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   None.


 Source Message Contents

Date:  Thu Feb 01 2007 - 14:12:03 CST
Subject:  [Full-disclosure] umount crash and xterm (kind of) information leak!

Hi!
In the past few days I faced two "interesting" situations!
One was a "SEGFAULT" in umount command, and
other is some kind of "information leak" in terminal
emulators (tested in xterm). Here is the link os the posts,
so anyone can check it out.

http://gotfault.wordpress.com/2007/01/18/umount-bug/
http://gotfault.wordpress.com/2007/02/01/a-funny-case/

Sorry for posting links, that is not a ADV. I just didnt want
to post it here again.. ;)

regards

---

Carlos Barros
http://www.barrossecurity.com
http://www.gotfault.net
http://gotfault.wordpress.com

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