CVE-2021-43529

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529", "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529", "tags": ["Issue Tracking"], "refsource": ""}, {"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529", "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-43529", "tags": ["Issue Tracking"], "refsource": ""}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-787"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-43529", "ASSIGNER": "security@mozilla.org"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2023-02-16T22:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "91.3.0"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2025-03-19T15:15Z"}