Mozilla Foundation Security Advisory 2010-32

Mozilla Foundation Security Advisory 2010-32

Title: Content-Disposition: attachment ignored if Content-Type: multipart also present
Impact: Moderate
Announced: June 22, 2010
Reporter: Ilja van Sprundel
Products: Firefox, SeaMonkey

Fixed in: Firefox 3.6.4
Firefox 3.5.10
SeaMonkey 2.0.5
Description

Security researcher Ilja van Sprundel of IOActive reported that the Content-Disposition: attachment HTTP header was ignored when Content-Type: multipart was also present. This issue could potentially lead to XSS problems in sites that allow users to upload arbitrary files and specify a Content-Type but rely on Content-Disposition: attachment to prevent the content from being displayed inline.
References

* https://bugzilla.mozilla.org/show_bug.cgi?id=537120
* CVE-2010-1197