'Orbis CMS' Arbitrary Script Execution Vulnerability (CVE-2010-4313)
Mark Stanislav - mark.stanislav@gmail.com


I. DESCRIPTION
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A vulnerability exists in the 'Orbis CMS' fileman_file_upload.php script that allows any authenticated user to upload a PHP script and then run it without restriction.

 
II. TESTED VERSION
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1.0.2 


III. PoC EXPLOIT
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1) Login as any CMS user (administrator or non-administrator)
2) Upload your desired PHP script (e.g. cmd.php)
3) Navigate to http://www.example.com/orbis/uploads/cmd.php?cmd=cat%20/etc/passwd


IV. NOTES 
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* This software is no longer developed according to the product page; it is still available for download though.
* Various other vulnerabilities exist in this code base (at least for previous versions); it's advisable not to use this software as patches are not coming.
* A vendor notice was not done for the aforementioned reasons.


V. SOLUTION
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Overhaul the upload verification portion of fileman_file_upload.php completely.


VI. REFERENCES
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http://www.novo-ws.com/orbis-cms/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4313
http://www.uncompiled.com/2010/11/orbis-cms-arbitrary-script-execution-vulnerability-cve-2010-4313/


VII. TIMELINE
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11/30/2010: Public disclosure