{"id":"CVE-2018-6535","aliases":["DEBIAN-CVE-2018-6535","EUVD-2018-18287","GHSA-5535-phc2-4862","UBUNTU-CVE-2018-6535"],"status":"published","title":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password...","description":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.","severity":{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01329,"percentile":0.7123,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2018-02-27T19:00:00Z","modified":"2026-10-24T10:48:42Z","fixes":[{"ecosystem":"Debian:12","package":"icinga2","fixed_in":["2.8.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"icinga2","fixed_in":["2.8.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"icinga2","fixed_in":["2.8.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.4-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"icinga","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.13.3-1","1.13.3-2","1.13.3-2ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"icinga","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.13.4-2build1"]}],"products":[{"vendor":"icinga","product":"icinga"}],"references":[{"url":"https://github.com/Icinga/icinga2/pull/5715","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://github.com/Icinga/icinga2/issues/4920","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-6535"},{"url":"https://github.com/advisories/GHSA-5535-phc2-4862"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-6535","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-6535","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-6535","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-6535","description":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.","status":"published","published":"2018-02-27T19:00:00Z","modified":"2024-08-05T06:10:10.158Z","updated_at":"2026-11-02T14:35:05.619113Z"}],"euvd":[{"id":"EUVD-2018-18287","description":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.","status":"published","published":"2018-02-27T19:00:00Z","modified":"2024-08-05T06:10:10Z","updated_at":"2026-11-03T02:40:07.640255Z"}],"ghsa":[{"id":"GHSA-5535-phc2-4862","title":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password...","description":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.","status":"published","published":"2022-05-13T01:53:07Z","modified":"2023-02-02T05:02:23Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:51:25.546182Z"}],"nvd":[{"id":"CVE-2018-6535","description":"An issue was discovered in Icinga 2.x through 2.8.1. The lack of a constant-time password comparison function can disclose the password to an attacker.","status":"published","published":"2018-02-27T19:29:00.543Z","modified":"2026-06-17T02:01:59.1Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:23.783914Z"}],"osv":[{"id":"CVE-2018-6535","description":"An issue was discovered in Icinga 2.x through 2.8.1. 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