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MFSA2021-04 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.7 (CVE-2021-23960)

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MFSA2021-04 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.7 (CVE-2021-23960)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
01/26/2021
Created
01/28/2021
Added
01/27/2021
Modified
03/05/2021

Description

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Solution(s)

  • mozilla-firefox-esr-upgrade-78_7

References

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