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Category:   Application (Generic)  >   libXfont Vendors:   X.org
(NetBSD Issues Fix) libXfont Heap Overflow in LZW Decompresser Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1026089
SecurityTracker URL:  http://securitytracker.com/id/1026089
CVE Reference:   CVE-2011-2895   (Links to External Site)
Date:  Sep 22 2011
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.4.4
Description:   A vulnerability was reported in libXfont. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted LZW stream that, when processed by the target user or application, will trigger a heap overflow in the LZW decompresser and execute arbitrary code on the target system. The code will run with the privileges of the target user or application.

Impact:   A remote user can create a file that, when processed by the target user or application, will execute arbitrary code on the target system.
Solution:   NetBSD has issued a fix.

The NetBSD advisory is available at:

http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2011-007.txt.asc

Vendor URL:  lists.freedesktop.org/archives/xorg-announce/2011-August/001721.html (Links to External Site)
Cause:   Boundary error
Underlying OS:  UNIX (NetBSD)
Underlying OS Comments:  4.0, 5.0, 5.1

Message History:   This archive entry is a follow-up to the message listed below.
Aug 11 2011 libXfont Heap Overflow in LZW Decompresser Lets Remote Users Execute Arbitrary Code



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