CVE-2020-6819 Information

Description

Under certain conditions when running the nsDocShell destructor a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird 68.7.0 Firefox 74.0.1 and Firefox ESR 68.6.1.

CVSS Vector

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

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1620818 https://usn.ubuntu.com/4335-1/ https://www.mozilla.org/security/advisories/mfsa2020-11/ https://www.mozilla.org/security/advisories/mfsa2020-14/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1