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VULNERABILITIES

CVE-2021-43537 Details

Description

An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=1738237 CVEIssue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html CVEMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html CVEMailing ListThird Party Advisory
https://security.gentoo.org/glsa/202202-03 CVEThird Party Advisory
https://security.gentoo.org/glsa/202208-14 CVEThird Party Advisory

see all 20 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-704Incorrect Type Conversion or Cast[email protected]

Affected Products

ProductVersions
mozilla firefox
< 95.0

CPE

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
mozilla firefox esr
< 91.4.0

CPE

  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
mozilla thunderbird
< 91.4.0

CPE

  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
9.0
10.0
11.0

CPE

  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

14 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-43537
NVD Published Date:
Dec 8, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-43537 Details - Not Deferred