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Zeroboard ".htaccess" File Upload Vulnerability
Secunia Advisory: SA20592
Release Date: 2006-06-13
Last Update: 2006-06-20
Popularity: 7,886 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Unpatched

Software:Zeroboard 4.x

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CVE reference:CVE-2006-3070


Description:
Choi Min-sung has discovered a vulnerability in Zeroboard, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an error in restricting the uploading of files with the ".htaccess" filename. This can be exploited to upload a malicious ".htaccess" file that uses the "AddType" directive to cause the Apache web server to execute files with arbitrary extensions as PHP scripts.

Successful exploitation requires that the "mod_mime" module is installed and that the web directory has been configured with "AllowOverride All" or "AllowOverride FileInfo".

The vulnerability has been confirmed in version 4.1 pl8 (Traditional Chinese version). Other versions may also be affected.

Solution:
Edit the source code to prevent the uploading of ".htaccess" file.

Provided and/or discovered by:
Choi Min-sung

Changelog:
2006-06-16: Updated "Description" section.
2006-06-20: Added CVE reference.


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