CVE-2016-9042

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Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition."}]}, "impact": {"cvss": {"baseScore": 3.7, "baseSeverity": "Low", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "denial of service"}]}]}, "references": {"reference_data": [{"name": "1038123", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1038123"}, {"name": "FreeBSD-SA-17:03", "refsource": "FREEBSD", "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-17:03.ntp.asc"}, {"name": "1039427", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1039427"}, {"name": "97046", "refsource": "BID", "url": "http://www.securityfocus.com/bid/97046"}, {"name": "USN-3349-1", "refsource": "UBUNTU", "url": "http://www.ubuntu.com/usn/USN-3349-1"}, {"name": "20170412 FreeBSD Security Advisory 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{}

{"affected": [{"affectedData": [{"product": "Network Time Protocol", "vendor": "Talos", "versions": [{"status": "affected", "version": "NTP 4.2.8p9"}]}], "source": "talos-cna@cisco.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ntp:ntp:4.2.8:p9:*:*:*:*:*:*", "matchCriteriaId": "EE002C76-406D-4F22-B738-E17BDEA70BCC", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:freebsd:freebsd:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "CA79CE41-D873-4A4A-A20C-83EB8772E5FA", "vulnerable": true}, {"criteria": "cpe:2.3:o:freebsd:freebsd:11.0:*:*:*:*:*:*:*", "matchCriteriaId": "53E56F4F-B418-44DD-9C97-7276A4C58F3E", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:hpe:hpux-ntp:*:*:*:*:*:*:*:*", "matchCriteriaId": "F1A1FDA7-BE46-4FAB-A3FD-9A40C770C4AB", "versionEndExcluding": "c.4.2.8.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simatic_net_cp_443-1_opc_ua_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "22EFD09A-3D77-47B0-93FB-50F6C13A2F9A", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simatic_net_cp_443-1_opc_ua:-:*:*:*:*:*:*:*", "matchCriteriaId": "7F488810-73E3-4475-975A-C2FCA037E78B", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition."}, {"lang": "es", "value": "Existe una vulnerabilidad explotable de denegaci\u00f3n de servicio (DoS) en la funcionalidad de comprobaci\u00f3n de marca de tiempo de origen de ntpd 4.2.8p9. Se puede emplear un paquete de red no autenticado especialmente manipulado para reiniciar la marca de tiempo de origen esperada para los peers objetivo. Las respuestas leg\u00edtimas de los peers objetivo no pasar\u00e1n la comprobaci\u00f3n de marca de tiempo de origen (TEST2), lo que hace que la respuesta se elimine y se cree una condici\u00f3n de denegaci\u00f3n de servicio (DoS)."}], "id": "CVE-2016-9042", "lastModified": "2026-06-17T00:55:20.353", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "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": "LOW", 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"https://support.f5.com/csp/article/K39041624"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mitigation", "Third Party Advisory"], "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0260"}], "sourceIdentifier": "talos-cna@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the NTP project for reporting this issue. Upstream acknowledges Matthew Van Gundy (Cisco) as the original reporter.", "bugzilla": {"description": "ntp: DoS via origin timestamp check functionality", "id": "1434017", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1434017"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.", "A vulnerability was found in NTP, affecting the origin timestamp check function. An attacker able to spoof messages from all of the configured peers could send crafted packets to ntpd, causing later replies from those peers to be discarded, resulting in denial of service."], "mitigation": {"lang": "en:us", "value": "Implement BCP-38.\nConfigure enough servers/peers that an attacker cannot target all of your time sources.\nProperly monitor your ntpd instances, and auto-restart ntpd (without -g) if it stops running."}, "name": "CVE-2016-9042", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2017-03-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-9042\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-9042\nhttp://www.talosintelligence.com/reports/TALOS-2016-0260/"], "threat_severity": "Moderate"}

{}