Red Hat Bugzilla – Bug 149930
CAN-2005-0586 Download dialog spoofing using Content-Disposition header
Last modified: 2007-11-30 17:07:16 EST
Andreas Sanblad of Secunia Research demonstrated a method to spoof the download
dialog for saving files by supplying a Content-Disposition header with a
different extension than the extension visible in the link and download dialog.
Users could be tricked into downloading a safe-looking file such as a JPEG image
and have it actually be saved with an executable extension.
Windows hides file extensions by default. If the user did not notice the
incorrect icon they might at some later time double-click on the saved file and
execute it instead of having it open in the expected media application.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.