Collected research

Additional Image Bypass on Windows

Additional Image Bypass on Windows ha.ckers.org web application security lab

Michael Schramm's finding, relayed by ha.ckers.org: NTFS alternate data streams let a filename carry "::$DATA", which Windows strips when the file is written. Appending it to "foobar.php" slipped past FCKeditor's denied-extension blacklist and landed on disk as foobar.php. It works on any Windows web server on NTFS, not only IIS.

Record

Document

Additional Image Bypass on Windows ha.ckers.org web application security lab

Published by

ha.ckers.org

Topic

Other

In the archive

• Collected in the 2007 research round

Tags

• file-upload
• filter-bypass
• php
• parser-differential
• abuse-of-functionality
• owasp-a04-2021
• owasp-a05-2021

This page is the archive's own catalogue record. The research is the work of ha.ckers.org, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 16 August 2026.