{"id":"CVE-2023-23549","aliases":["EUVD-2023-27649","GHSA-q72p-p7xm-7vmr","UBUNTU-CVE-2023-23549"],"status":"published","title":"DoS via long hostnames","description":"Improper Input Validation in Checkmk \u003c2.2.0p15, \u003c2.1.0p37, \u003c=2.0.0p39 allows priviledged attackers to cause partial denial of service of the UI via too long hostnames.","severity":{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00648,"percentile":0.51408,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1284","CWE-20"],"published":"2023-11-15T11:07:28Z","modified":"2026-10-28T02:30:42Z","affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"check-mk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.6p5-1","1.2.6p12-1","1.2.6p12-1ubuntu0.16.04.1","1.2.6p12-1ubuntu0.16.04.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"check-mk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.8p16-1ubuntu0.1","1.2.8p16-1ubuntu0.2"]}],"products":[{"vendor":"checkmk","product":"checkmk"},{"vendor":"checkmk gmbh","product":"checkmk"}],"references":[{"url":"https://checkmk.com/werk/16219","tags":["x_transferred","Vendor Advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-23549","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q72p-p7xm-7vmr"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23549.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-23549","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-23549","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-23549","title":"DoS via long hostnames","description":"Improper Input Validation in Checkmk \u003c2.2.0p15, \u003c2.1.0p37, \u003c=2.0.0p39 allows priviledged attackers to cause partial denial of service of the UI via too long hostnames.","status":"published","published":"2023-11-15T11:07:28.671Z","modified":"2024-08-28T20:25:01.313Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:35:21.232549Z"}],"euvd":[{"id":"EUVD-2023-27649","description":"Improper Input Validation in Checkmk \u003c2.2.0p15, \u003c2.1.0p37, \u003c=2.0.0p39 allows priviledged attackers to cause partial denial of service of the UI via too long hostnames.","status":"published","published":"2023-11-15T11:07:28Z","modified":"2024-08-28T20:25:01Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-03T00:56:08.302583Z"}],"ghsa":[{"id":"GHSA-q72p-p7xm-7vmr","title":"Improper Input Validation in Checkmk \u003c2.2.0p15, \u003c2.1.0p37, \u003c=2.0.0p39 allows priviledged...","description":"Improper Input Validation in Checkmk \u003c2.2.0p15, 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hostnames.","status":"published","published":"2023-11-15T11:15:08.173Z","modified":"2026-06-17T05:37:24.573Z","cvss":[{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"},{"version":"3.1","score":2.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"primary"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:08:47.966245Z"}],"osv":[{"id":"CVE-2023-23549","title":"DoS via long hostnames","description":"Improper Input Validation in Checkmk \u003c2.2.0p15, \u003c2.1.0p37, \u003c=2.0.0p39 allows priviledged attackers to cause partial denial of service of the UI via too long 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