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MFSA2017-27 Firefox: Security vulnerabilities fixed in Firefox 57.0.1 (CVE-2017-7843)

Severity CVSS Published Added Modified
5 (AV:N/AC:L/Au:N/C:P/I:N/A:N) November 29, 2017 December 05, 2017 August 08, 2018

Description

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.

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References

Solution

mozilla-firefox-upgrade-57_0_1

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