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Category:   Application (Generic)  >   X Vendors:   X.org
X11R6 XKEYBOARD Extension Buffer Overflow Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1016806
SecurityTracker URL:  http://securitytracker.com/id/1016806
CVE Reference:   CVE-2006-4655   (Links to External Site)
Updated:  Jun 3 2008
Original Entry Date:  Sep 8 2006
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): X11R6.4 and prior versions
Description:   A vulnerability was reported in X11R6. A local user can obtain elevated privileges on the target system.

A string manipulation function of the X11R6 X Window System library contains a buffer overflow. When the XKEYBOARD extension is enabled, a local user can set the _XKB_CHARSET environment variable and the DISPLAY environment variable to a specially crafted value and invoke an application that is dynamically linked to the affected library to execute arbitrary code on the target system. The code will run with the privileges of the application.

Adriano Lima and Filipe Balestra of RISE Security discovered this vulnerability.

The original advisory is available at:

http://www.risesecurity.org/advisory/RISE-2006001.txt

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   The vulnerability was silently fixed in X11R6.5.1.
Vendor URL:  www.x.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 8 2006 (Sun Issues Fix) X11R6 XKEYBOARD Extension Buffer Overflow Lets Local Users Gain Elevated Privileges
Sun has issued a fix for Solaris 8, 9, and 10.



 Source Message Contents



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