Mozilla Foundation Security Advisory 2015-33
resource:// documents can load privileged pages
- Announced
- March 31, 2015
- Reporter
- Mariusz Mlynski
- Impact
- Moderate
- Products
- Firefox, Firefox ESR, Firefox OS, SeaMonkey, Thunderbird
- Fixed in
-
- Firefox 37
- Firefox ESR 31.6
- Firefox OS 2.2
- SeaMonkey 2.35
- Thunderbird 31.6
Description
Security researcher Mariusz Mlynski reported, through HP
Zero Day Initiative's Pwn2Own contest, that documents loaded though a
resource: URL, such as Mozilla's PDF.js PDF file
viewer, were able to subsequently load privileged chrome pages. The privilege
restrictions on resource: URLs was handled incorrectly and these
restrictions could be bypassed if this flaw was combined with a separate
vulnerability allowing for same-origin policy violation, it could be used to run
arbitrary code.
In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts.