CVE-2020-12387

Public on 2020-05-19
Modified on 2020-05-20
Description
A flaw was found in Mozilla Firefox and Thunderbird. When running shutdown code for Web Worker, a race condition occurs leading to a use-after-free memory flaw that could lead to an exploitable crash. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity
Critical severity
Critical
CVSS v3 Base Score
8.8
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core thunderbird 2020-05-19 ALAS2-2020-1429 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD CVSSv2 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
NVD CVSSv3 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H