CVE-2016-1551

{"containers": {"cna": {"affected": [{"product": "NTP", "vendor": "NTP Project", "versions": [{"status": "affected", "version": "4.2.8p3"}, {"status": "affected", "version": "4.2.8p4"}]}, {"product": "NTPSec", "vendor": "NTPsec Project", "versions": [{"status": "affected", "version": "3e160db8dc248a0bcb053b56a80167dc742d2b74"}, {"status": "affected", "version": "a5fb34b9cc89b92a8fef2f459004865c93bb7f92"}]}], "datePublic": "2016-04-26T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker."}], "problemTypes": [{"descriptions": [{"description": "unspecified", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2017-11-20T15:57:01.000Z", "orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc"}, "references": [{"name": "88219", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/88219"}, {"tags": ["x_refsource_MISC"], "url": "http://www.talosintelligence.com/reports/TALOS-2016-0132/"}, {"name": "1035705", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1035705"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://security.netapp.com/advisory/ntap-20171004-0002/"}, {"name": "FreeBSD-SA-16:16", "tags": ["vendor-advisory", "x_refsource_FREEBSD"], "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"}, {"name": "GLSA-201607-15", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/201607-15"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cert@cert.org", "ID": "CVE-2016-1551", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "NTP", "version": {"version_data": [{"version_value": "4.2.8p3"}, {"version_value": "4.2.8p4"}]}}]}, "vendor_name": "NTP Project"}, {"product": {"product_data": [{"product_name": "NTPSec", "version": {"version_data": [{"version_value": "3e160db8dc248a0bcb053b56a80167dc742d2b74"}, {"version_value": "a5fb34b9cc89b92a8fef2f459004865c93bb7f92"}]}}]}, "vendor_name": "NTPsec Project"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "unspecified"}]}]}, "references": {"reference_data": [{"name": "88219", "refsource": "BID", "url": "http://www.securityfocus.com/bid/88219"}, {"name": "http://www.talosintelligence.com/reports/TALOS-2016-0132/", "refsource": "MISC", "url": "http://www.talosintelligence.com/reports/TALOS-2016-0132/"}, {"name": "1035705", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1035705"}, {"name": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html", "refsource": "CONFIRM", "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"}, {"name": "https://security.netapp.com/advisory/ntap-20171004-0002/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20171004-0002/"}, {"name": "FreeBSD-SA-16:16", "refsource": "FREEBSD", "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"}, {"name": "GLSA-201607-15", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/201607-15"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T23:02:12.002Z"}, "title": "CVE Program Container", "references": [{"name": "88219", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/88219"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://www.talosintelligence.com/reports/TALOS-2016-0132/"}, {"name": "1035705", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1035705"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://security.netapp.com/advisory/ntap-20171004-0002/"}, {"name": "FreeBSD-SA-16:16", "tags": ["vendor-advisory", "x_refsource_FREEBSD", "x_transferred"], "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"}, {"name": "GLSA-201607-15", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/201607-15"}]}]}, "cveMetadata": {"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "assignerShortName": "certcc", "cveId": "CVE-2016-1551", "datePublished": "2017-01-27T17:00:00.000Z", "dateReserved": "2016-01-07T00:00:00.000Z", "dateUpdated": "2024-08-05T23:02:12.002Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "NTP", "vendor": "NTP Project", "versions": [{"status": "affected", "version": "4.2.8p3"}, {"status": "affected", "version": "4.2.8p4"}]}, {"product": "NTPSec", "vendor": "NTPsec Project", "versions": [{"status": "affected", "version": "3e160db8dc248a0bcb053b56a80167dc742d2b74"}, {"status": "affected", "version": "a5fb34b9cc89b92a8fef2f459004865c93bb7f92"}]}], "source": "cret@cert.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:*", "matchCriteriaId": "41E44E9F-6383-4E12-AEDC-B653FEA77A48", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ntpsec:ntpsec:a5fb34b9cc89b92a8fef2f459004865c93bb7f92:*:*:*:*:*:*:*", "matchCriteriaId": "5765FE6F-2E10-4712-8FD7-EA982572FB17", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker."}, {"lang": "es", "value": "ntpd en NTP 4.2.8p3 y NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 conf\u00eda en el sistema operativo subyacente para protegerlo de las solicitudes que suplantan relojes de referencia. Debido a que los relojes de referencia son tratados como otros pares y almacenados en la misma estructura, cualquier paquete con una direcci\u00f3n IP de origen de un reloj de referencia (127.127.1.1 por ejemplo) que alcance la funci\u00f3n receive() coincidir\u00e1 con el registro de par de referencia clock's y ser\u00e1 tratado como un par de confianza. Cualquier sistema que carezca del t\u00edpico filtrado de paquetes marcianos que bloquear\u00eda estos paquetes est\u00e1 en peligro de tener su tiempo controlado por un atacante."}], "id": "CVE-2016-1551", "lastModified": "2026-06-17T00:42:09.300", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "HIGH", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.6, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:H/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 4.9, "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": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-01-27T17:59:00.227", "references": [{"source": "cret@cert.org", "tags": ["Third Party Advisory"], "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"}, {"source": "cret@cert.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/88219"}, {"source": "cret@cert.org", "url": "http://www.securitytracker.com/id/1035705"}, {"source": "cret@cert.org", "tags": ["Third Party Advisory"], "url": "http://www.talosintelligence.com/reports/TALOS-2016-0132/"}, {"source": "cret@cert.org", "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"}, {"source": "cret@cert.org", "url": "https://security.gentoo.org/glsa/201607-15"}, {"source": "cret@cert.org", "url": "https://security.netapp.com/advisory/ntap-20171004-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/88219"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securitytracker.com/id/1035705"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.talosintelligence.com/reports/TALOS-2016-0132/"}, {"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/"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-254"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "ntp: ntpd reference clock impersonation", "id": "1331465", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1331465"}, "csaw": false, "cvss": {"cvss_base_score": "2.6", "cvss_scoring_vector": "AV:N/AC:H/Au:N/C:N/I:P/A:N", "status": "draft"}, "details": ["ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker."], "name": "CVE-2016-1551", "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": "2016-04-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-1551\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-1551\nhttp://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security\nhttp://www.talosintel.com/reports/TALOS-2016-0132/"], "statement": "This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5, 6, and 7 as the Linux kernel drops packets from 127.0.0.0/8, mitigating this issue.", "threat_severity": "Low"}

{}