chmlib 'extract_chmLib' Directory Traversal Bug Lets Remote Users Overwrie Files
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SecurityTracker Alert ID: 1016343
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SecurityTracker URL: http://securitytracker.com/id?1016343
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CVE Reference: CVE-2006-3178
(Links to External Site)
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Updated: May 12 2009
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Original Entry Date: Jun 20 2006
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Impact: Modification of system information, Modification of user information
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): prior to 0.38
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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.
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Impact: A remote user can cause files on the target system to be overwritten.
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Solution: No solution was available at the time of this entry.
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Vendor URL: morte.jedrea.com/~jedwin/projects/chmlib/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Message History:
None.
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Source Message Contents
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Date: Tue, 20 Jun 2006 01:05:55 -0400
Subject: CHM lib / chmlib update
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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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