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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*", "matchCriteriaId": "99C71C00-7222-483B-AEFB-159337BD3C92", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key."}, {"lang": "es", "value": "Existe una vulnerabilidad explotable en el mensaje de autenticaci\u00f3n de la funci\u00f3n del libntp en ntp 4.2.8p4 y NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. Un atacante puede enviar series de mensajes manipulados para intentar el mensaje de direcci\u00f3n de clave."}], "id": "CVE-2016-1550", "lastModified": "2026-05-06T22:30:45.220", "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": "2017-01-06T21:59:00.413", "references": [{"source": "cret@cert.org", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html"}, {"source": "cret@cert.org", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html"}, {"source": "cret@cert.org", "url": "http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html"}, {"source": "cret@cert.org", "url": "http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html"}, {"source": "cret@cert.org", "url": "http://rhn.redhat.com/errata/RHSA-2016-1552.html"}, {"source": "cret@cert.org", "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd"}, {"source": "cret@cert.org", "url": "http://www.debian.org/security/2016/dsa-3629"}, {"source": "cret@cert.org", "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"}, {"source": 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"url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": 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"af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2016:1141"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/201607-15"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20171004-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.debian.org/security/2016/dsa-3629"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/718152"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2016:1141", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "ntp-0:4.2.6p5-10.el6.1", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2016-05-31T00:00:00Z"}, {"advisory": "RHSA-2016:1552", "cpe": "cpe:/o:redhat:rhel_eus:6.7", "package": "ntp-0:4.2.6p5-5.el6_7.5", "product_name": "Red Hat Enterprise Linux 6.7 Extended Update Support", "release_date": "2016-08-03T00:00:00Z"}, {"advisory": "RHSA-2016:1141", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "ntp-0:4.2.6p5-22.el7_2.2", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-05-31T00:00:00Z"}], "bugzilla": {"description": "ntp: libntp message digest disclosure", "id": "1331464", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1331464"}, "csaw": false, "cvss": {"cvss_base_score": "2.6", "cvss_scoring_vector": "AV:L/AC:H/Au:N/C:P/I:P/A:N", "status": "verified"}, "details": ["An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.", "A flaw was found in the way NTP's libntp performed message authentication. An attacker able to observe the timing of the comparison function used in packet authentication could potentially use this flaw to recover the message digest."], "name": "CVE-2016-1550", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2016-04-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-1550\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-1550\nhttp://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security\nhttp://www.talosintel.com/reports/TALOS-2016-0084/"], "threat_severity": "Low"}

{}