CVE-2020-12405

MEDIUM

Thunderbird <68.9.0-Firefox <77-Firefox ESR <68.9 - RCE

Title source: llm
STIX 2.1

Description

When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

References (5)

Core 5
Core References
Exploit, Issue Tracking, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1631618
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4421-1/

Scores

CVSS v3 5.3
EPSS 0.0066
EPSS Percentile 71.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-362 CWE-416
Status published
Products (7)
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 19.10
canonical/ubuntu_linux 20.04
mozilla/firefox < 77.0
mozilla/firefox_esr < 68.9.0
mozilla/thunderbird < 68.9.0
Published Jul 09, 2020
Tracked Since Feb 18, 2026