CVE-2021-43529

Published Feb 16, 2023

Last updated 2 years ago

CVSS critical 9.8

Overview

Description: Thunderbird versions prior to 91.3.0 are vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable code when processing S/MIME messages that contain certificates with DER-encoded DSA or RSA-PSS signatures.
Source: security@mozilla.org
NVD status: Analyzed

Risk scores

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

nvd@nist.gov: CWE-787

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "65E19CA9-5FDF-4253-8D56-FD82239F7D93",
            "versionEndExcluding": "91.3.0"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

References