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Category:   Application (Forum/Board/Portal)  >   Yet Another Community System (YACS) Vendors:
Yet Another Community System (YACS) Include File Bug in 'context[path_to_root]' Parameter Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1016775
SecurityTracker URL:
CVE Reference:   CVE-2006-4532   (Links to External Site)
Updated:  Jun 8 2008
Original Entry Date:  Sep 1 2006
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 6.6.1
Description:   A vulnerability was reported in Yet Another Community System (YACS). A remote user can include and execute arbitrary code on the target system.

The software does not properly validate user-supplied input in the 'context[path_to_root]' parameter. A remote user can supply a specially crafted URL to cause the target system to include and execute arbitrary PHP code from a remote location. The PHP code, including operating system commands, will run with the privileges of the target web service.

Several scripts are affected.

A demonstration exploit URL is provided:


MATASANOS discovered this vulnerability.

Impact:   A remote user can execute arbitrary PHP code and operating system commands on the target system with the privileges of the target web service.
Solution:   The vendor has issued a patch for version 6.6.1, available at:

Vendor URL: (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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