Vulnerability-Lookup

GSD-2021-43529

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

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.

Aliases

CVE-2021-43529

Aliases

CVE-2021-43529

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-43529",
    "id": "GSD-2021-43529",
    "references": [
      "https://www.debian.org/security/2022/dsa-5034",
      "https://access.redhat.com/errata/RHSA-2021:4130",
      "https://access.redhat.com/errata/RHSA-2021:4132",
      "https://access.redhat.com/errata/RHSA-2021:4133",
      "https://access.redhat.com/errata/RHSA-2021:4134",
      "https://www.suse.com/security/cve/CVE-2021-43529.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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      "id": "GSD-2021-43529",
      "modified": "2023-12-13T01:23:25.943176Z",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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          "impactScore": 5.9
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      "publishedDate": "2023-02-16T22:15Z"
    }
  }
}

CVE-2021-43529 (GCVE-0-2021-43529)

Vulnerability from cvelistv5 – Published: 2023-02-16 00:00 – Updated: 2025-03-19 15:00

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-19 15:00 UTC

CWE

Memory corruption when processing S/MIME messages
CWE-787 - Out-of-bounds Write

Assigner

mozilla mitre root

References

1 reference

URL	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-…

Impacted products

1 product

Vendor	Product	Version
Mozilla	Thunderbird	Affected: unspecified , < 91.3.0 (custom)

Show details on NVD website

JSON

To clipboard

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        ],
        "title": "CVE Program Container"
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                "timestamp": "2025-03-19T15:00:26.576004Z",
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  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.