Mozilla

Mozilla Foundation Security Advisory 2005-12

javascript: Livefeed bookmarks can steal cookies

Announced
January 21, 2005
Reporter
Omar Khan
Impact
High
Products
Firefox
Fixed in
  • Firefox 1

Description

Earlier versions of Firefox allowed javascript: and data: URLs as Livefeed bookmarks. When they updated the URL would be run in the context of the current page and could be used to steal cookies or data displayed on the page.

If the user were on a page with elevated privileges (for example, about:config) when the Livefeed was updated, the feed URL could potentially run arbitrary code on the user's machine.

Workaround

Do not add non-http URLs as a Livefeed bookmark. Upgrade to the fixed version

References

https://bugzilla.mozilla.org/show_bug.cgi?id=265668