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Insecure Library Loading
Highly critical

PmWiki Unregister "register_globals" Layer Bypass

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Release Date:  2006-01-30    Last Update:  2006-02-03    Views:  9,944

Secunia Advisory SA18634

Where:

From remote

Impact:

Security Bypass, Cross Site Scripting, Exposure of system information, Exposure of sensitive information, System access

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Francesco "aScii" Ongaro has discovered a vulnerability in PmWiki, which can be exploited by malicious people to bypass certain security restrictions, conduct cross-site scripting attacks, disclose sensitive information, and compromise a vulnerable system.

The vulnerability is caused due to an error in the unregister "register_globals" layer in the handling of the "GLOBALS" array parameter. This can e.g. be exploited to include arbitrary files from external and local resources, and execute arbitrary HTML and script code in a user's browser session in context of an affected site.

Example:
http://[victim]/pmwiki.php?GLOBALS&GLOBALS[FarmD]=[file]

Successful exploitation requires that "register_globals" is enabled.

It is also possible to disclose the full path to the installation.

The vulnerability has been confirmed in version 2.0.13 and has also been reported in version 2.1 beta 20. Other versions may also be affected.


Solution:
The vulnerability has been fixed in version 2.1 beta 21.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Francesco "aScii" Ongaro

Original Advisory:
http://www.ush.it/2006/01/24/pmwiki-multiple-vulnerabilities/

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: PmWiki Unregister "register_globals" Layer Bypass

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