{"id":"CVE-2013-5211","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-5211","generatedAt":"2026-11-05T07:17:12.167Z","title":"The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013.","description":"The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013.","published":"2014-01-02T14:59:03.000Z","lastModified":"2026-06-16T23:58:31.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P"},"cwe":["CWE-20"],"affected":["opensuse/opensuse","ntp/ntp","oracle/linux"],"epss":{"score":0.97549,"percentile":0.99901,"date":"2026-11-04","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2014-04-28","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":33073,"kind":"exploit","title":"NTP ntpd monlist Query Reflection - Denial of Service","url":"https://www.exploit-db.com/exploits/33073","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/33073.c","file":"exploits/linux/dos/33073.c","published":"2014-04-28","added":"2014-04-28","updated":"2014-04-28","author":"Danilo PC","type":"dos","platform":"linux","port":123,"verified":false,"codes":["CVE-2013-5211","OSVDB-101576"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 97.5%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://aix.software.ibm.com/aix/efixes/security/ntp_advisory.asc","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://bugs.ntp.org/show_bug.cgi?id=1532","tags":["Issue Tracking"],"source":"cve@mitre.org"},{"url":"http://ics-cert.us-cert.gov/advisories/ICSA-14-051-04","tags":["Third Party Advisory","US Government Resource"],"source":"cve@mitre.org"},{"url":"http://lists.ntp.org/pipermail/pool/2011-December/005616.html","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-updates/2014-09/msg00031.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=138971294629419&w=2","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=144182594518755&w=2","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2013/12/30/6","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2013/12/30/7","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/59288","tags":["Not Applicable"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/59726","tags":["Not Applicable"],"source":"cve@mitre.org"},{"url":"http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095861","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095892","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-dev/ntp-dev-4.2.7p26.tar.gz","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.kb.cert.org/vuls/id/348126","tags":["Third Party Advisory","US Government Resource"],"source":"cve@mitre.org"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/64692","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1030433","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.us-cert.gov/ncas/alerts/TA14-013A","tags":["Third Party Advisory","US Government Resource"],"source":"cve@mitre.org"},{"url":"https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://puppet.com/security/cve/puppetlabs-ntp-nov-2015-advisory","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://aix.software.ibm.com/aix/efixes/security/ntp_advisory.asc","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://bugs.ntp.org/show_bug.cgi?id=1532","tags":["Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://ics-cert.us-cert.gov/advisories/ICSA-14-051-04","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.ntp.org/pipermail/pool/2011-December/005616.html","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2014-09/msg00031.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=bugtraq&m=138971294629419&w=2","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=bugtraq&m=144182594518755&w=2","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2013/12/30/6","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2013/12/30/7","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/59288","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/59726","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095861","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095892","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-dev/ntp-dev-4.2.7p26.tar.gz","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.kb.cert.org/vuls/id/348126","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/64692","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1030433","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.us-cert.gov/ncas/alerts/TA14-013A","tags":["Third Party Advisory","US Government Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04790232","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://puppet.com/security/cve/puppetlabs-ntp-nov-2015-advisory","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2013-5211","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}