Mozilla Foundation Security Advisory 2012-53
Content Security Policy 1.0 implementation errors cause data leakage
- Announced
- July 17, 2012
- Reporter
- Karthikeyan Bhargavan
- Impact
- High
- Products
- Firefox, Firefox ESR, SeaMonkey, Thunderbird, Thunderbird ESR
- Fixed in
-
- Firefox 14
- Firefox ESR 10.0.6
- SeaMonkey 2.11
- Thunderbird 14
- Thunderbird ESR 10.0.6
Description
Security researcher Karthikeyan Bhargavan of Prosecco at INRIA reported Content Security Policy (CSP) 1.0 implementation errors. CSP violation reports generated by Firefox and sent to the "report-uri" location include sensitive data within the "blocked-uri" parameter. These include fragment components and query strings even if the "blocked-uri" parameter has a different origin than the protected resource. This can be used to retrieve a user's OAuth 2.0 access tokens and OpenID credentials by malicious sites.