When Private Browsing mode is used, it is possible for a web worker to write persistent data to IndexedDB and fingerprint a user uniquely. IndexedDB should not be available in Private Browsing mode and this stored data will persist across multiple private browsing mode sessions because it is not cleared when exiting. This vulnerability affects Firefox ESR < 52.5.2 and Firefox < 57.0.1.
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2017:3382 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2017/12/msg00003.html | third party advisory mailing list |
| https://www.mozilla.org/security/advisories/mfsa2017-28/ | vendor advisory |
| http://www.securitytracker.com/id/1039954 | third party advisory vdb entry |
| https://www.mozilla.org/security/advisories/mfsa2017-27/ | vendor advisory |
| https://www.debian.org/security/2017/dsa-4062 | third party advisory vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1410106 | third party advisory issue tracking exploit |
| http://www.securityfocus.com/bid/102039 | third party advisory vdb entry issue tracking |
| http://www.securityfocus.com/bid/102112 | third party advisory vdb entry |