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Category:   Application (Generic)  >   ncompress Vendors:   ncompress.sourceforge.net
(ncompress Issues Fix) Gzip Integer Underflow in Processing LZW Compressed Archives May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1024235
SecurityTracker URL:  http://securitytracker.com/id/1024235
CVE Reference:   CVE-2010-0001   (Links to External Site)
Date:  Jul 21 2010
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 4.2.4.3
Description:   A vulnerability was reported in Gzip. A remote user can cause arbitrary code to be executed on the target user's system. ncompress is affected.

A remote user can create a specially crafted LZW compressed gzip archive that, when unzipped by the target user, will trigger an integer underflow and execute arbitrary code on the target system. The code will run with the privileges of the target user.

Aki Helin of Oulu University Secure Programming Group (OUSPG) reported this vulnerability.

Impact:   A remote user can create an archive that, when unzipped by the target user, will execute arbitrary code on the target user's system.
Solution:   A fix is available for ncompress (4.2.4.3).

The ncompress advisory is available at:

http://ncompress.sourceforge.net/#status

Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry is a follow-up to the message listed below.
Jan 21 2010 Gzip Integer Underflow in Processing LZW Compressed Archives May Let Remote Users Execute Arbitrary Code



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