CVE-2020-26959 Information

Description

During browser shutdown reference decrementing could have occured on a previously freed object resulting in a use-after-free memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 83 Firefox ESR < 78.5 and Thunderbird < 78.5.

CVSS Vector

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

Reference

https://www.mozilla.org/security/advisories/mfsa2020-50/ https://www.mozilla.org/security/advisories/mfsa2020-51/ https://www.mozilla.org/security/advisories/mfsa2020-52/ https://bugzilla.mozilla.org/show_bug.cgi?id=1669466

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8