Description
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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 < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Published: 2021-12-08
Score: 8.8 High
EPSS: 1.2% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2863-1 firefox-esr security update
Debian DLA Debian DLA DLA-2874-1 thunderbird security update
Debian DSA Debian DSA DSA-5026-1 firefox-esr security update
Debian DSA Debian DSA DSA-5034-1 thunderbird security update
EUVD EUVD EUVD-2021-30463 Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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 < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Ubuntu USN Ubuntu USN USN-5248-1 Thunderbird vulnerabilities
History

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Debian Debian Linux
Mozilla Firefox Firefox Esr Thunderbird
Redhat Enterprise Linux Rhel Eus
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-04T03:55:29.303Z

Reserved: 2021-11-08T00:00:00.000Z

Link: CVE-2021-43534

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-12-08T22:15:09.467

Modified: 2024-11-21T06:29:22.413

Link: CVE-2021-43534

cve-icon Redhat

Severity : Important

Publid Date: 2021-11-02T00:00:00Z

Links: CVE-2021-43534 - Bugzilla

cve-icon OpenCVE Enrichment

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Weaknesses