CVE-2016-4745

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2016-09-20T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2017-07-29T09:57:01.000Z", "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple"}, "references": [{"name": "1036858", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1036858"}, {"name": "APPLE-SA-2016-09-20", "tags": ["vendor-advisory", "x_refsource_APPLE"], "url": "http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html"}, {"name": "93055", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/93055"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://support.apple.com/HT207170"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "product-security@apple.com", "ID": "CVE-2016-4745", "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": "The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "1036858", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1036858"}, {"name": "APPLE-SA-2016-09-20", "refsource": "APPLE", "url": "http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html"}, {"name": "93055", "refsource": "BID", "url": "http://www.securityfocus.com/bid/93055"}, {"name": "https://support.apple.com/HT207170", "refsource": "CONFIRM", "url": "https://support.apple.com/HT207170"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T00:39:26.028Z"}, "title": "CVE Program Container", "references": [{"name": "1036858", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1036858"}, {"name": "APPLE-SA-2016-09-20", "tags": ["vendor-advisory", "x_refsource_APPLE", "x_transferred"], "url": "http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html"}, {"name": "93055", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/93055"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://support.apple.com/HT207170"}]}]}, "cveMetadata": {"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "assignerShortName": "apple", "cveId": "CVE-2016-4745", "datePublished": "2016-09-25T10:00:00.000Z", "dateReserved": "2016-05-11T00:00:00.000Z", "dateUpdated": "2024-08-06T00:39:26.028Z", "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": "product-security@apple.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*", "matchCriteriaId": "FEEAF544-405E-4A75-9206-5CC4EDCE2F05", "versionEndIncluding": "10.11.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack."}, {"lang": "es", "value": "El m\u00f3dulo PAM de Kerberos 5 (tambi\u00e9n conocido como krb5) en Apple OS X en versiones anteriores a 10.12 no utiliza operaciones de tiempo constante para determinar la validaci\u00f3n de nombre de usuario, lo que facilita a atacantes remotos enumerar cuentas de usuario a trav\u00e9s de un ataque de sincronizaci\u00f3n de canal lateral."}], "id": "CVE-2016-4745", "lastModified": "2026-06-17T00:48:08.623", "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}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-09-25T10:59:44.987", "references": [{"source": "product-security@apple.com", "tags": ["Mailing List", "Vendor Advisory"], "url": "http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html"}, {"source": "product-security@apple.com", "url": "http://www.securityfocus.com/bid/93055"}, {"source": "product-security@apple.com", "url": "http://www.securitytracker.com/id/1036858"}, {"source": "product-security@apple.com", "tags": ["Vendor Advisory"], "url": "https://support.apple.com/HT207170"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Vendor Advisory"], "url": "http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/93055"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1036858"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://support.apple.com/HT207170"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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