CVE-2017-7843
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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- http://www.securityfocus.com/bid/102039
- http://www.securityfocus.com/bid/102112
- http://www.securitytracker.com/id/1039954
- https://access.redhat.com/errata/RHSA-2017:3382
- https://bugzilla.mozilla.org/show_bug.cgi?id=1410106
- https://lists.debian.org/debian-lts-announce/2017/12/msg00003.html
- https://www.debian.org/security/2017/dsa-4062
- https://www.mozilla.org/security/advisories/mfsa2017-27/
- https://www.mozilla.org/security/advisories/mfsa2017-28/