CVE-2020-6800
HIGHFirefox < 73.0 and Firefox ESR < 68.5.0 - Out-of-bounds Write
Title source: llmDescription
Mozilla developers and community members reported memory safety bugs present in Firefox 72 and Firefox ESR 68.4. 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. In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5.
References (9)
Core 9
Core References
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-05/
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-06/
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-07/
Broken Link, Issue Tracking x_refsource_misc
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595786%2C1596706%2C1598543%2C1604851%2C1608580%2C1608785%2C1605777
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4278-2/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202003-02
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202003-10
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4328-1/
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4335-1/
Scores
CVSS v3
8.8
EPSS
0.0125
EPSS Percentile
79.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (6)
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
19.10
mozilla/firefox
< 73.0
mozilla/firefox_esr
< 68.5.0
mozilla/thunderbird
< 68.5.0
Published
Mar 02, 2020
Tracked Since
Feb 18, 2026