{"id":"CVE-2018-16860","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-16860","generatedAt":"2026-10-29T01:54:25.365Z","title":"A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.","description":"A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.","published":"2019-07-31T15:15:12.000Z","lastModified":"2026-06-17T01:44:56.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-358"],"affected":["samba/samba","heimdal project/heimdal"],"epss":{"score":0.02486,"percentile":0.84535,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html","source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/11","source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/13","source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/14","source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/15","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860","tags":["Issue Tracking","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://seclists.org/bugtraq/2019/Aug/21","source":"secalert@redhat.com"},{"url":"https://seclists.org/bugtraq/2019/Aug/22","source":"secalert@redhat.com"},{"url":"https://seclists.org/bugtraq/2019/Aug/23","source":"secalert@redhat.com"},{"url":"https://seclists.org/bugtraq/2019/Aug/25","source":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/202003-52","source":"secalert@redhat.com"},{"url":"https://support.apple.com/HT210346","source":"secalert@redhat.com"},{"url":"https://support.apple.com/HT210348","source":"secalert@redhat.com"},{"url":"https://support.apple.com/HT210351","source":"secalert@redhat.com"},{"url":"https://support.apple.com/HT210353","source":"secalert@redhat.com"},{"url":"https://www.samba.org/samba/security/CVE-2018-16860.html","tags":["Mitigation","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://www.synology.com/security/advisory/Synology_SA_19_23","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/11","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/13","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/14","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2019/Aug/15","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16860","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/21","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/22","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/23","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2019/Aug/25","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202003-52","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT210346","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT210348","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT210351","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT210353","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.samba.org/samba/security/CVE-2018-16860.html","tags":["Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.synology.com/security/advisory/Synology_SA_19_23","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-16860","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."}