{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "6.0"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "OpenNTPD before 6.0p1 does not validate the CN for HTTPS constraint requests, which allows remote attackers to bypass the man-in-the-middle mitigations via a crafted timestamp constraint with a valid certificate.",
  "id": "CVE-2016-5117",
  "modified": "2026-03-14T13:51:17.490267796Z",
  "published": "2017-01-31T19:59:00.230Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openntpd.org/txt/release-6.0p1.txt"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2016/05/23/2"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2016/05/29/6"
    },
    {
      "type": "FIX",
      "url": "http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=1.27\u0026r2=1.28"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}