CVE-2021-43398

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value"}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-12-17T15:31:24.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://github.com/weidai11/cryptopp/issues/1080"}, {"tags": ["x_refsource_MISC"], "url": "https://cryptopp.com"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222"}], "tags": ["disputed"], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-43398", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "** DISPUTED ** Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/weidai11/cryptopp/issues/1080", "refsource": "MISC", "url": "https://github.com/weidai11/cryptopp/issues/1080"}, {"name": "https://cryptopp.com", "refsource": "MISC", "url": "https://cryptopp.com"}, {"name": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222", "refsource": "MISC", "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:55:28.758Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/weidai11/cryptopp/issues/1080"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://cryptopp.com"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-43398", "datePublished": "2021-11-04T20:06:38.000Z", "dateReserved": "2021-11-04T00:00:00.000Z", "dateUpdated": "2024-08-04T03:55:28.758Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cryptopp:crypto\\+\\+:*:*:*:*:*:*:*:*", "matchCriteriaId": "38083732-7F2F-45F1-B773-8BD7A039F08B", "versionEndIncluding": "8.6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [{"sourceIdentifier": "cve@mitre.org", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value"}, {"lang": "es", "value": "** EN DISPUTA ** Crypto++ (tambi\u00e9n se conoce como Cryptopp) versiones 8.6.0 y anteriores, contienen un filtrado de tiempo en la funci\u00f3n MakePublicKey(). Se presenta una clara correlaci\u00f3n entre el tiempo de ejecuci\u00f3n y la longitud de la clave privada, que puede causar una divulgaci\u00f3n de la informaci\u00f3n de la longitud de la clave privada. Esto podr\u00eda permitir a atacantes conducir ataques de tiempo. NOTA: este informe es discutido por el vendedor y por m\u00faltiples terceros. Las diferencias de tiempo de ejecuci\u00f3n son intencionadas. Un usuario puede elegir una clave m\u00e1s larga como compensaci\u00f3n entre la fuerza y el rendimiento. Al hacer esta elecci\u00f3n, la cantidad de informaci\u00f3n filtrada a un adversario es de valor infinitesimal"}], "id": "CVE-2021-43398", "lastModified": "2026-06-17T04:10:55.000", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-04T21:15:09.520", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://cryptopp.com"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/weidai11/cryptopp/issues/1080"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://cryptopp.com"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/weidai11/cryptopp/issues/1080"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"], "url": "https://github.com/weidai11/cryptopp/issues/1080#issuecomment-996492222"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-203"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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