vulnerability
MFSA2021-04 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.7 (CVE-2021-23964)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Jan 26, 2021 | Jan 27, 2021 | Aug 11, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Jan 26, 2021
Added
Jan 27, 2021
Modified
Aug 11, 2025
Description
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. 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 Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Solution
mozilla-firefox-esr-upgrade-78_7
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