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Category:   Application (Generic)  >   chmlib Vendors:   Wing, Jed
chmlib 'extract_chmLib' Directory Traversal Bug Lets Remote Users Overwrie Files
SecurityTracker Alert ID:  1016343
SecurityTracker URL:  http://securitytracker.com/id/1016343
CVE Reference:   CVE-2006-3178   (Links to External Site)
Updated:  May 12 2009
Original Entry Date:  Jun 20 2006
Impact:   Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.38
Description:   A vulnerability was reported in chmlib. A remote user can view files on the target system.

The 'extract_chmLib' example program does not properly validate user-supplied filenames. A remote user can supply a file with a specially crafted filename containing '..' directory traversal characters that, when extracted by the target user, will cause a file on target system to be overwritten. Files can be overwritten with the privileges of the target user.

Sven Tantau discovered this vulnerability.

Impact:   A remote user can cause files on the target system to be overwritten.
Solution:   No solution was available at the time of this entry.
Vendor URL:  morte.jedrea.com/~jedwin/projects/chmlib/ (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


 Source Message Contents

Date:  Tue, 20 Jun 2006 01:05:55 -0400
Subject:  CHM lib / chmlib update


http://morte.jedrea.com/~jedwin/projects/chmlib/

> .. it includes a quick fix for a security hazard Sven Tantau located in one of the 
> example programs (extract_chmLib would extract filenames containing ".." as a path 
> element, allowing overwriting of any file to which the user has write access). 
 
 


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