CVE-2017-7843

MEDIUM

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.

References

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/

Details

Source: MITRE

Published: 2018-06-11

Updated: 2018-08-06

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH