CVE-2019-11331

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ntp:ntp:-:*:*:*:*:*:*:*", "matchCriteriaId": "07C904EB-F926-42EC-8AE1-FC2A3BF4FD66", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number is not required, which makes it easier for remote attackers to conduct off-path attacks."}, {"lang": "es", "value": "Network Time Protocol (NTP), tal y como se especifica en el RFC 5905, utiliza el puerto 123 incluso para los modos en los que no se requiere un n\u00famero de puerto fijo, lo que facilita a los atacantes remotos la realizaci\u00f3n de ataques fuera de ruta."}], "id": "CVE-2019-11331", "lastModified": "2026-06-17T02:12:43.603", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-04-18T22:29:00.517", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://www.securityfocus.com/bid/108010"}, {"source": "cve@mitre.org", "url": "https://support.f5.com/csp/article/K09940637"}, {"source": "cve@mitre.org", "url": "https://support.f5.com/csp/article/K09940637?utm_source=f5support&amp%3Butm_medium=RSS"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://tools.ietf.org/html/draft-gont-ntp-port-randomization-00"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.securityfocus.com/bid/108010"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.f5.com/csp/article/K09940637"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.f5.com/csp/article/K09940637?utm_source=f5support&amp%3Butm_medium=RSS"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://tools.ietf.org/html/draft-gont-ntp-port-randomization-00"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "ntp: Using port 123 for modes where a fixed port number is not required facilitates off-path attacks.", "id": "1703341", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1703341"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-384", "details": ["Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number is not required, which makes it easier for remote attackers to conduct off-path attacks."], "mitigation": {"lang": "en:us", "value": "On Red Hat Enterprise Linux 6 and later, switching from ntp to chrony is recommended. Among other design improvements, chrony uses a randomised source port by default.\nIf using ntp, the source port can be randomised by iptables masquerading rules, effectively mitigating this vulnerability:\niptables -t nat -I POSTROUTING -p udp -m udp --sport 123 -j MASQUERADE --to-ports 60000-61000"}, "name": "CVE-2019-11331", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "ntp", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2019-04-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-11331\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-11331"], "threat_severity": "Low"}

{}