{"id":"CVE-2017-10908","aliases":["DEBIAN-CVE-2017-10908","EUVD-2017-2547","GHSA-hcqf-mq24-hm46","UBUNTU-CVE-2017-10908"],"status":"published","title":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server...","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03636,"percentile":0.8963,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2017-12-22T14:00:00Z","modified":"2026-10-20T10:48:07Z","fixes":[{"ecosystem":"Debian:12","package":"h2o","fixed_in":["2.2.4+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"h2o","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.4+dfsg-1"}]}]}],"products":[{"vendor":"dena","product":"h2o"},{"vendor":"h2o","product":"h2o"},{"vendor":"kazuho oku","product":"h2o"}],"references":[{"url":"https://github.com/h2o/h2o/issues/1544","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://jvn.jp/en/jp/JVN84182676/index.html","tags":["third-party-advisory","x_refsource_JVN","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-10908"},{"url":"https://github.com/advisories/GHSA-hcqf-mq24-hm46"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-10908","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-10908","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-10908","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2017-10908","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"published","published":"2017-12-22T14:00:00Z","modified":"2024-08-05T17:50:12.443Z","updated_at":"2026-11-02T14:33:12.942409Z"}],"euvd":[{"id":"EUVD-2017-2547","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"published","published":"2017-12-22T14:00:00Z","modified":"2024-08-05T17:50:12Z","updated_at":"2026-11-03T02:23:25.281788Z"}],"ghsa":[{"id":"GHSA-hcqf-mq24-hm46","title":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server...","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"published","published":"2022-05-13T01:10:47Z","modified":"2023-02-01T05:03:39Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:50:05.685198Z"}],"nvd":[{"id":"CVE-2017-10908","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"published","published":"2017-12-22T14:29:12.64Z","modified":"2026-06-17T01:00:54.09Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/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"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:04:11.215487Z"}],"osv":[{"id":"CVE-2017-10908","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"published","published":"2017-12-22T14:29:12.64Z","modified":"2026-10-20T10:48:07.748187532Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:03.851821Z"},{"id":"DEBIAN-CVE-2017-10908","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"published","published":"2017-12-22T14:29:12.64Z","modified":"2026-09-01T20:03:40.963705254Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:28.207321Z"},{"id":"UBUNTU-CVE-2017-10908","description":"H2O version 2.2.3 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/2 header.","status":"withdrawn","published":"2017-12-22T14:29:00Z","modified":"2025-07-16T07:35:40.717479Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:13.729565Z"}]}}