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DESCRIPTION: A vulnerability has been discovered in FCKeditor, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to an error in the file upload functionality. This can be exploited to bypass the file extension filter and upload files with arbitrary extensions by using the NTFS Alternate Data Stream (ADS) as the filename, e.g. "file.php::$DATA". Successful exploitation requires that an NTFS file system is used and that file uploads have been enabled in the "config.php" configuration file (not enabled by default). The vulnerability is confirmed in version 2.4.3 using the PHP file uploader.
SOLUTION: Disable file uploads in config.php. Grant only trusted user access to the application.
PROVIDED AND/OR DISCOVERED BY: Michael Schramm
ORIGINAL ADVISORY: http://ha.ckers.org/blog/20070606/additional-image-bypass-on-windows/
Posted on Monday, June 18, 2007 @ 15:38:59 EDT by Raven
Re: FCKeditor ADS File Upload Vulnerability - Windows Only (Score: 1) by kguske on Tuesday, June 19, 2007 @ 08:03:50 EDT Not registered user
Although this was tested in version 2.4.3 (released 6/14/2007) , it shouldn't affect RavenNuke users using nukeWYSIWYG (currently using version 2.3.2) as uploads are only allowed for admins.
On the subject of 2.4.3, there are a few (literally 3) enhancements and a slew of fixes in this version. We hope to evaluate this version (or a corrected version to address this reported vulnerability) soon.
Re: FCKeditor ADS File Upload Vulnerability - Windows Only (Score: 1) by redhairz on Tuesday, June 26, 2007 @ 16:40:15 EDT Not registered user
hi kguske sorry to trouble you, can you check for me? cos i am using rn with the 2.2 that comes in the Experimental folder of the rnnuke is that safe?
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