{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2016-6210", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-05-29T20:17:40.496Z", "dateReserved": "2016-07-13T00:00:00.000Z", "datePublished": "2017-02-13T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2022-12-13T00:00:00.000Z"}, "descriptions": [{"lang": "en", "value": "sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"name": "RHSA-2017:2563", "tags": ["vendor-advisory"], "url": "https://access.redhat.com/errata/RHSA-2017:2563"}, {"name": "1036319", "tags": ["vdb-entry"], "url": "http://www.securitytracker.com/id/1036319"}, {"name": "20160714 opensshd - user enumeration", "tags": ["mailing-list"], "url": "http://seclists.org/fulldisclosure/2016/Jul/51"}, {"name": "DSA-3626", "tags": ["vendor-advisory"], "url": "http://www.debian.org/security/2016/dsa-3626"}, {"name": "40136", "tags": ["exploit"], "url": "https://www.exploit-db.com/exploits/40136/"}, {"name": "40113", "tags": ["exploit"], "url": "https://www.exploit-db.com/exploits/40113/"}, {"url": "https://www.openssh.com/txt/release-7.3"}, {"name": "GLSA-201612-18", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/201612-18"}, {"name": "RHSA-2017:2029", "tags": ["vendor-advisory"], "url": "https://access.redhat.com/errata/RHSA-2017:2029"}, {"name": "91812", "tags": ["vdb-entry"], "url": "http://www.securityfocus.com/bid/91812"}, {"url": "https://security.netapp.com/advisory/ntap-20190206-0001/"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}], "datePublic": "2016-07-14T00:00:00.000Z"}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T01:22:20.650Z"}, "title": "CVE Program Container", "references": [{"name": "RHSA-2017:2563", "tags": ["vendor-advisory", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2017:2563"}, {"name": "1036319", "tags": ["vdb-entry", "x_transferred"], "url": "http://www.securitytracker.com/id/1036319"}, {"name": "20160714 opensshd - user enumeration", "tags": ["mailing-list", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2016/Jul/51"}, {"name": "DSA-3626", "tags": ["vendor-advisory", "x_transferred"], "url": "http://www.debian.org/security/2016/dsa-3626"}, {"name": "40136", "tags": ["exploit", "x_transferred"], "url": "https://www.exploit-db.com/exploits/40136/"}, {"name": "40113", "tags": ["exploit", "x_transferred"], "url": "https://www.exploit-db.com/exploits/40113/"}, {"url": "https://www.openssh.com/txt/release-7.3", "tags": ["x_transferred"]}, {"name": "GLSA-201612-18", "tags": ["vendor-advisory", "x_transferred"], "url": "https://security.gentoo.org/glsa/201612-18"}, {"name": "RHSA-2017:2029", "tags": ["vendor-advisory", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2017:2029"}, {"name": "91812", "tags": ["vdb-entry", "x_transferred"], "url": "http://www.securityfocus.com/bid/91812"}, {"url": "https://security.netapp.com/advisory/ntap-20190206-0001/", "tags": ["x_transferred"]}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf", "tags": ["x_transferred"]}]}, {"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-200", "lang": "en", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-29T20:17:34.559558Z", "id": "CVE-2016-6210", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-29T20:17:40.496Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://access.redhat.com/errata/RHSA-2017:2563", "name": "RHSA-2017:2563", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "http://www.securitytracker.com/id/1036319", "name": "1036319", "tags": ["vdb-entry", "x_transferred"]}, {"url": "http://seclists.org/fulldisclosure/2016/Jul/51", "name": "20160714 opensshd - user enumeration", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://www.debian.org/security/2016/dsa-3626", "name": "DSA-3626", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "https://www.exploit-db.com/exploits/40136/", "name": "40136", "tags": ["exploit", "x_transferred"]}, {"url": "https://www.exploit-db.com/exploits/40113/", "name": "40113", "tags": ["exploit", "x_transferred"]}, {"url": "https://www.openssh.com/txt/release-7.3", "tags": ["x_transferred"]}, {"url": "https://security.gentoo.org/glsa/201612-18", "name": "GLSA-201612-18", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2017:2029", "name": "RHSA-2017:2029", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "http://www.securityfocus.com/bid/91812", "name": "91812", "tags": ["vdb-entry", "x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20190206-0001/", "tags": ["x_transferred"]}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T01:22:20.650Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2016-6210", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-29T20:17:34.559558Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-200", "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-29T20:17:31.137Z"}}], "cna": {"affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2016-07-14T00:00:00.000Z", "references": [{"url": "https://access.redhat.com/errata/RHSA-2017:2563", "name": "RHSA-2017:2563", "tags": ["vendor-advisory"]}, {"url": "http://www.securitytracker.com/id/1036319", "name": "1036319", "tags": ["vdb-entry"]}, {"url": "http://seclists.org/fulldisclosure/2016/Jul/51", "name": "20160714 opensshd - user enumeration", "tags": ["mailing-list"]}, {"url": "http://www.debian.org/security/2016/dsa-3626", "name": "DSA-3626", "tags": ["vendor-advisory"]}, {"url": "https://www.exploit-db.com/exploits/40136/", "name": "40136", "tags": ["exploit"]}, {"url": "https://www.exploit-db.com/exploits/40113/", "name": "40113", "tags": ["exploit"]}, {"url": "https://www.openssh.com/txt/release-7.3"}, {"url": "https://security.gentoo.org/glsa/201612-18", "name": "GLSA-201612-18", "tags": ["vendor-advisory"]}, {"url": "https://access.redhat.com/errata/RHSA-2017:2029", "name": "RHSA-2017:2029", "tags": ["vendor-advisory"]}, {"url": "http://www.securityfocus.com/bid/91812", "name": "91812", "tags": ["vdb-entry"]}, {"url": "https://security.netapp.com/advisory/ntap-20190206-0001/"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}], "descriptions": [{"lang": "en", "value": "sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "n/a"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2022-12-13T00:00:00.000Z"}}}, "cveMetadata": {"cveId": "CVE-2016-6210", "state": "PUBLISHED", "dateUpdated": "2026-05-29T20:17:40.496Z", "dateReserved": "2016-07-13T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2017-02-13T00:00:00.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openbsd:openssh:*:p2:*:*:*:*:*:*", "matchCriteriaId": "4AFA4267-E15B-4826-9B98-63F68AB1627F", "versionEndIncluding": "7.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided."}, {"lang": "es", "value": "sshd en OpenSSH en versiones anteriores a 7.3, cuando SHA256 o SHA512 son utilizados para el hashing de la contrase\u00f1a del usuario, utiliza BLOWFISH hashing en una contrase\u00f1a est\u00e1tica cuando no existe el nombre de usuario, lo que permite a atacantes remotos enumerar usuarios aprovechando la diferencia de tiempo entre respuestas cuando se proporciona una contrase\u00f1a grande."}], "id": "CVE-2016-6210", "lastModified": "2026-05-29T21:16:29.743", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2017-02-13T17:59:00.153", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2016/Jul/51"}, {"source": "cve@mitre.org", "url": "http://www.debian.org/security/2016/dsa-3626"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/91812"}, {"source": "cve@mitre.org", "url": "http://www.securitytracker.com/id/1036319"}, {"source": "cve@mitre.org", "url": "https://access.redhat.com/errata/RHSA-2017:2029"}, {"source": "cve@mitre.org", "url": "https://access.redhat.com/errata/RHSA-2017:2563"}, {"source": "cve@mitre.org", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}, {"source": "cve@mitre.org", "url": "https://security.gentoo.org/glsa/201612-18"}, {"source": "cve@mitre.org", "url": "https://security.netapp.com/advisory/ntap-20190206-0001/"}, {"source": "cve@mitre.org", "url": "https://www.exploit-db.com/exploits/40113/"}, {"source": "cve@mitre.org", "url": "https://www.exploit-db.com/exploits/40136/"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.openssh.com/txt/release-7.3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2016/Jul/51"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.debian.org/security/2016/dsa-3626"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/91812"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1036319"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2017:2029"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2017:2563"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201612-18"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20190206-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.exploit-db.com/exploits/40113/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.exploit-db.com/exploits/40136/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.openssh.com/txt/release-7.3"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-200"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2017:2563", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "openssh-0:5.3p1-123.el6_9", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2017-08-31T00:00:00Z"}, {"advisory": "RHSA-2017:2029", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "openssh-0:7.4p1-11.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-08-01T00:00:00Z"}], "bugzilla": {"description": "openssh: User enumeration via covert timing channel", "id": "1357442", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1357442"}, "csaw": false, "cvss": {"cvss_base_score": "5.0", "cvss_scoring_vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "status": "verified"}, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "verified"}, "cwe": "CWE-385", "details": ["sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.", "A covert timing channel flaw was found in the way OpenSSH handled authentication of non-existent users. A remote unauthenticated attacker could possibly use this flaw to determine valid user names by measuring the timing of server responses."], "name": "CVE-2016-6210", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2016-07-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-6210\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-6210"], "statement": "This issue in OpenSSH is mitigated by the usage of SELinux in Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.", "threat_severity": "Moderate"}