Mozilla Foundation Security Advisory 2012-76
Continued access to initial origin after setting document.domain
- Announced
- October 9, 2012
- Reporter
- Collin Jackson
- Impact
- High
- Products
- Firefox, SeaMonkey, Thunderbird
- Fixed in
-
- Firefox 16
- SeaMonkey 2.13
- Thunderbird 16
Description
Security researcher Collin Jackson reported a violation of
the HTML5 specifications for document.domain behavior. Specified
behavior requires pages to only have access to windows in a new
document.domain but the observed violation allowed pages to retain
access to windows from the page's initial origin in addition to the new
document.domain. This could potentially lead to cross-site
scripting (XSS) attacks.
In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.