CVE-2019-11743

MEDIUM

Description

Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1560495

https://usn.ubuntu.com/4150-1/

https://w3c.github.io/navigation-timing

https://www.mozilla.org/security/advisories/mfsa2019-25/

https://www.mozilla.org/security/advisories/mfsa2019-26/

https://www.mozilla.org/security/advisories/mfsa2019-27/

https://www.mozilla.org/security/advisories/mfsa2019-29/

https://www.mozilla.org/security/advisories/mfsa2019-30/

Details

Source: MITRE

Published: 2019-09-27

Updated: 2019-10-04

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 4.3

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

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 3.7

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Impact Score: 1.4

Exploitability Score: 2.2

Severity: LOW