CVEvulnerability

CVE-2021-43537

8.8 HIGH Published 2021-12-08 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-12-08
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-704

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.

Affected configurations

• mozilla firefox (< 95.0) • mozilla firefox esr (< 91.4.0) • mozilla thunderbird (< 91.4.0) • debian debian linux 9.0 • debian debian linux 10.0 • debian debian linux 11.0

Related

Weakness · CWE (1)

  • CWE-704 Incorrect Type Conversion or Cast weakness

Referenced by CWE · observed example (5)

  • CWE-122 Heap-based Buffer Overflow weakness
  • CWE-190 Integer Overflow or Wraparound weakness
  • CWE-680 Integer Overflow to Buffer Overflow weakness
  • CWE-681 Incorrect Conversion between Numeric Types weakness
  • CWE-704 Incorrect Type Conversion or Cast weakness

References