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{"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"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*", "matchCriteriaId": "C729D5D1-ED95-443A-9F53-5D7C2FD9B80C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string."}, {"lang": "es", "value": "La funci\u00f3n auth_password en auth-passwd.c en sshd en OpenSSH en versiones anteriores a 7.3 no limita longitudes de contrase\u00f1a para autenticaci\u00f3n de contrase\u00f1a, lo que permite a atacantes remotos provocar una denegaci\u00f3n de servicio (consumo de CPU clave) a trav\u00e9s de una cadena larga."}], "id": "CVE-2016-6515", "lastModified": "2025-04-12T10:46:40.837", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": 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{"affected_release": [{"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: Denial of service via very long passwords", "id": "1364935", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1364935"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "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:N/I:N/A:L", "status": "verified"}, "cwe": "CWE-770", "details": ["The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.", "It was found that OpenSSH did not limit password lengths for password authentication. A remote unauthenticated attacker could use this flaw to temporarily trigger high CPU consumption in sshd by sending long passwords."], "name": "CVE-2016-6515", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2016-07-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-6515\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-6515"], "statement": "This issue in OpenSSH is mitigated by the usage of SELinux in Red Hat Enterprise Linux 6, 7 and 8. More details available at: https://bugzilla.redhat.com/show_bug.cgi?id=1364935#c13", "threat_severity": "Moderate"}

{}