CVE-2020-12387 Information

Description

A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR 68.8 Firefox 76 and Thunderbird 68.8.0.

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=1545345 https://security.gentoo.org/glsa/202005-03 https://security.gentoo.org/glsa/202005-04 https://usn.ubuntu.com/4373-1/ https://www.mozilla.org/security/advisories/mfsa2020-16/ https://www.mozilla.org/security/advisories/mfsa2020-17/ https://www.mozilla.org/security/advisories/mfsa2020-18/

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