Mozilla

Mozilla Foundation Security Advisory 2016-18

CSP reports fail to strip location information for embedded iframe pages

Announced
March 8, 2016
Reporter
Muneaki Nishimura
Impact
Moderate
Products
Firefox, Thunderbird
Fixed in
  • Firefox 45
  • Thunderbird 45

Description

Security researcher Muneaki Nishimura (nishimunea) of Recruit Technologies Co.,Ltd. reported that Content Security Policy (CSP) violation reports contained full path information for cross-origin iframe navigations in violation of the CSP specification. This could result in information disclosure.

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.

References