CVE-2020-6825

CRITICAL

Firefox < 75.0 and Firefox ESR < 68.7.0 - Out-of-bounds Write

Title source: llm
STIX 2.1

Description

Mozilla developers and community members Tyson Smith and Christian Holler reported memory safety bugs present in Firefox 74 and Firefox ESR 68.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.

References (5)

Core 5
Core References
Issue Tracking, Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1572541%2C1620193%2C1620203
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4335-1/

Scores

CVSS v3 9.8
EPSS 0.0070
EPSS Percentile 72.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (3)
mozilla/firefox < 75.0
mozilla/firefox_esr < 68.7.0
mozilla/thunderbird < 68.7.0
Published Apr 24, 2020
Tracked Since Feb 18, 2026