{"api_version":"1","generated_at":"2026-04-23T09:37:57+00:00","cve":"CVE-2016-4957","urls":{"html":"https://cve.report/CVE-2016-4957","api":"https://cve.report/api/cve/CVE-2016-4957.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2016-4957","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-4957"},"summary":{"title":"CVE-2016-4957","description":"ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2016-07-05 01:59:00","updated_at":"2020-06-18 18:07:00"},"problem_types":["CWE-476"],"metrics":[],"references":[{"url":"http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html","name":"http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html","refsource":"CONFIRM","tags":["Third Party Advisory"],"title":"Oracle Solaris Bulletin - April 2016","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html","name":"openSUSE-SU-2016:1636","refsource":"SUSE","tags":["Mailing List","Third Party Advisory"],"title":"[security-announce] openSUSE-SU-2016:1636-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html","name":"openSUSE-SU-2016:1583","refsource":"SUSE","tags":["Mailing List","Third Party Advisory"],"title":"[security-announce] openSUSE-SU-2016:1583-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://security.gentoo.org/glsa/201607-15","name":"GLSA-201607-15","refsource":"GENTOO","tags":["Third Party Advisory"],"title":"NTP: Multiple vulnerabilities (GLSA 201607-15) — Gentoo Security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html","name":"SUSE-SU-2016:1602","refsource":"SUSE","tags":["Mailing List","Third Party Advisory"],"title":"[security-announce] SUSE-SU-2016:1602-1: important: Security update for","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securitytracker.com/id/1036037","name":"1036037","refsource":"SECTRACK","tags":["Third Party Advisory","VDB Entry"],"title":"ntp Multiple Bugs Let Remote Users Modify Parameters and Deny Service - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://support.ntp.org/bin/view/Main/SecurityNotice","name":"http://support.ntp.org/bin/view/Main/SecurityNotice","refsource":"CONFIRM","tags":["Release Notes","Vendor Advisory"],"title":"","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://support.ntp.org/bin/view/Main/NtpBug3046","name":"http://support.ntp.org/bin/view/Main/NtpBug3046","refsource":"CONFIRM","tags":["Patch","Vendor Advisory"],"title":"","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://bugs.ntp.org/3046","name":"http://bugs.ntp.org/3046","refsource":"CONFIRM","tags":["Issue Tracking","Vendor Advisory"],"title":"Bug 3046 – CRYPTO_NAK crash","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.kb.cert.org/vuls/id/321640","name":"VU#321640","refsource":"CERT-VN","tags":["Third Party Advisory","US Government Resource"],"title":"Vulnerability Note VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilities","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html","name":"SUSE-SU-2016:1563","refsource":"SUSE","tags":["Mailing List","Third Party Advisory"],"title":"[security-announce] SUSE-SU-2016:1563-1: important: Security update for","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html","name":"SUSE-SU-2016:1584","refsource":"SUSE","tags":["Mailing List","Third Party Advisory"],"title":"[security-announce] SUSE-SU-2016:1584-1: important: Security update for","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc","name":"FreeBSD-SA-16:24","refsource":"FREEBSD","tags":["Third Party Advisory"],"title":"","mime":"text/plain","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-4957","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4957","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"novell","cpe5":"suse_manager","cpe6":"2.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"novell","cpe5":"suse_manager","cpe6":"2.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ntp","cpe5":"ntp","cpe6":"4.2.8","cpe7":"p7","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ntp","cpe5":"ntp","cpe6":"4.3.92","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ntp","cpe5":"ntp","cpe6":"4.2.8","cpe7":"p7","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ntp","cpe5":"ntp","cpe6":"4.3.92","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"42.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"42.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"opensuse","cpe6":"13.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"opensuse","cpe6":"13.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"oracle","cpe5":"solaris","cpe6":"10","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"oracle","cpe5":"solaris","cpe6":"11.3","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"oracle","cpe5":"solaris","cpe6":"10","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"oracle","cpe5":"solaris","cpe6":"11.3","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_desktop","cpe6":"12","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_desktop","cpe6":"12","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"11","cpe7":"sp2","cpe8":"*","cpe9":"*","cpe10":"ltss","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"11","cpe7":"sp3","cpe8":"*","cpe9":"*","cpe10":"ltss","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"11","cpe7":"sp4","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"12","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"11","cpe7":"sp2","cpe8":"*","cpe9":"*","cpe10":"ltss","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"11","cpe7":"sp3","cpe8":"*","cpe9":"*","cpe10":"ltss","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"11","cpe7":"sp4","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"suse","cpe5":"linux_enterprise_server","cpe6":"12","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"suse","cpe5":"manager_proxy","cpe6":"2.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"suse","cpe5":"manager_proxy","cpe6":"2.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"suse","cpe5":"openstack_cloud","cpe6":"5","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2016","cve_id":"4957","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"suse","cpe5":"openstack_cloud","cpe6":"5","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2016-4957","qid":"690292","title":"Free Berkeley Software Distribution (FreeBSD) Security Update for FreeBSD (7cfcea05-600a-11e6-a6c3-14dae9d210b8)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2016-4957","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"SUSE-SU-2016:1602","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html"},{"name":"openSUSE-SU-2016:1583","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html"},{"name":"FreeBSD-SA-16:24","refsource":"FREEBSD","url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc"},{"name":"http://bugs.ntp.org/3046","refsource":"CONFIRM","url":"http://bugs.ntp.org/3046"},{"name":"1036037","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1036037"},{"name":"SUSE-SU-2016:1584","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html"},{"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":"VU#321640","refsource":"CERT-VN","url":"http://www.kb.cert.org/vuls/id/321640"},{"name":"http://support.ntp.org/bin/view/Main/SecurityNotice","refsource":"CONFIRM","url":"http://support.ntp.org/bin/view/Main/SecurityNotice"},{"name":"openSUSE-SU-2016:1636","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html"},{"name":"http://support.ntp.org/bin/view/Main/NtpBug3046","refsource":"CONFIRM","url":"http://support.ntp.org/bin/view/Main/NtpBug3046"},{"name":"SUSE-SU-2016:1563","refsource":"SUSE","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html"},{"name":"GLSA-201607-15","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/201607-15"}]}},"nvd":{"publishedDate":"2016-07-05 01:59:00","lastModifiedDate":"2020-06-18 18:07:00","problem_types":["CWE-476"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ntp:ntp:4.3.92:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:novell:suse_manager:2.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:suse:openstack_cloud:5:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:suse:manager_proxy:2.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:suse:linux_enterprise_server:12:sp1:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2016","CveId":"4957","Ordinal":"90901","Title":"CVE-2016-4957","CVE":"CVE-2016-4957","Year":"2016"},"notes":[{"CveYear":"2016","CveId":"4957","Ordinal":"1","NoteData":"ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.","Type":"Description","Title":null},{"CveYear":"2016","CveId":"4957","Ordinal":"2","NoteData":"2016-07-04","Type":"Other","Title":"Published"},{"CveYear":"2016","CveId":"4957","Ordinal":"3","NoteData":"2017-11-20","Type":"Other","Title":"Modified"}]}}}