'Orbis CMS' Arbitrary Script Execution Vulnerability (CVE-2010-4313) Mark Stanislav - mark.stanislav@gmail.com I. DESCRIPTION --------------------------------------- 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 --------------------------------------- 1.0.2 III. PoC EXPLOIT --------------------------------------- 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 --------------------------------------- * 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 --------------------------------------- Overhaul the upload verification portion of fileman_file_upload.php completely. VI. REFERENCES --------------------------------------- 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 --------------------------------------- 11/30/2010: Public disclosure