{"id":"CVE-2021-31702","aliases":["EUVD-2021-18587","GHSA-vv38-xhh2-74q7"],"status":"published","title":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host...","description":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, as demonstrated by submitting 127.0.0.1 multiple times for DoS.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01236,"percentile":0.69315,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-05-29T13:10:08Z","modified":"2026-06-17T03:52:09Z","products":[{"vendor":"frontiersoftware","product":"ichris"}],"references":[{"url":"https://github.com/l00neyhacker/CVE-2021-31702","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31702"},{"url":"https://github.com/advisories/GHSA-vv38-xhh2-74q7"}],"sources":{"cve":[{"id":"CVE-2021-31702","description":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, as demonstrated by submitting 127.0.0.1 multiple times for DoS.","status":"published","published":"2021-05-29T13:10:08Z","modified":"2024-08-03T23:03:33.697Z","updated_at":"2026-11-02T14:33:05.331617Z"}],"euvd":[{"id":"EUVD-2021-18587","description":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, as demonstrated by submitting 127.0.0.1 multiple times for DoS.","status":"published","published":"2021-05-29T13:10:08Z","modified":"2024-08-03T23:03:33Z","updated_at":"2026-11-03T03:24:38.423371Z"}],"ghsa":[{"id":"GHSA-vv38-xhh2-74q7","title":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host...","description":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, as demonstrated by submitting 127.0.0.1 multiple times for DoS.","status":"published","published":"2022-05-24T19:03:39Z","modified":"2023-01-29T05:07:47Z","updated_at":"2026-11-02T14:46:11.123221Z"}],"nvd":[{"id":"CVE-2021-31702","description":"Frontier ichris through 5.18 mishandles making a DNS request for the hostname in the HTTP Host header, as demonstrated by submitting 127.0.0.1 multiple times for DoS.","status":"published","published":"2021-05-29T14:15:08.453Z","modified":"2026-06-17T03:52:09.97Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:53.987491Z"}]}}