{"id":"CVE-2024-39844","aliases":["ALPINE-CVE-2024-39844","DEBIAN-CVE-2024-39844","DSA-5725-1","EUVD-2024-38265","GHSA-qh94-pjxq-88v7","MGASA-2024-0257","UBUNTU-CVE-2024-39844","USN-6990-1","openSUSE-SU-2024:0203-1","openSUSE-SU-2024:14115-1"],"status":"published","title":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.03862,"percentile":0.90326,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-94"],"published":"2024-07-03T00:00:00Z","modified":"2026-11-03T06:32:08Z","exploits":[{"source":"pocgithub","id":"ph1ns/CVE-2024-39844","title":"ph1ns/CVE-2024-39844","date":"2024-07-03","url":"https://github.com/ph1ns/CVE-2024-39844"}],"fixes":[{"ecosystem":"Alpine:v3.20","package":"znc","fixed_in":["1.9.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"znc","fixed_in":["1.9.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"znc","fixed_in":["1.9.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"znc","fixed_in":["1.9.1-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"znc","fixed_in":["1.9.1-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"znc","fixed_in":["1.8.2-3.1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"znc","fixed_in":["1.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"znc","fixed_in":["1.9.1-1"],"sources":["osv"]},{"ecosystem":"Debian:11","package":"znc","fixed_in":["1.8.2-2+deb11u1"],"sources":["osv"]},{"ecosystem":"Mageia:9","package":"znc","fixed_in":["1.8.2-21.1.mga9"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:14.04:LTS","package":"znc","fixed_in":["1.2-3ubuntu0.1+esm3"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"znc","fixed_in":["1.6.3-1ubuntu0.2+esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"znc","fixed_in":["1.6.6-1ubuntu0.2+esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"znc","fixed_in":["1.7.5-4ubuntu0.1~esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"znc","fixed_in":["1.8.2-2ubuntu0.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:24.04:LTS","package":"znc","fixed_in":["1.9.0-2ubuntu0.1~esm2"],"sources":["osv"]},{"ecosystem":"SUSE:Package Hub 15 SP6","package":"znc","fixed_in":["1.9.1-bp156.2.3.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 15.6","package":"znc","fixed_in":["1.9.1-bp156.2.3.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"znc","fixed_in":["1.9.1-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.20","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-3.1+deb12u1"}]}],"versions":["1.8.2-3.1"]},{"source":"osv","ecosystem":"Debian:13","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-1"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-2+deb11u1"}]}],"versions":["1.8.2-2"]},{"source":"osv","ecosystem":"Debian:12","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-3.1+deb12u1"}]}],"versions":["1.8.2-3.1"]},{"source":"osv","ecosystem":"Mageia:9","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-21.1.mga9"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2-3ubuntu0.1+esm3"}]}],"versions":["1.0-5","1.0-5build1","1.2-1","1.2-2","1.2-3","1.2-3build1","1.2-3ubuntu0.1","1.2-3ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.3-1ubuntu0.2+esm2"}]}],"versions":["1.6.1-1","1.6.1-1build1","1.6.1-2","1.6.2-1","1.6.2-2","1.6.2-2build1","1.6.3-1","1.6.3-1ubuntu0.1","1.6.3-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.6-1ubuntu0.2+esm2"}]}],"versions":["1.6.5-2build2","1.6.5-2build3","1.6.5-2build4","1.6.5-2build5","1.6.6-1","1.6.6-1ubuntu0.1","1.6.6-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.5-4ubuntu0.1~esm2"}]}],"versions":["1.7.4-7","1.7.4-7build1","1.7.5-1","1.7.5-2","1.7.5-2build1","1.7.5-2build2","1.7.5-2build3","1.7.5-3","1.7.5-3build1","1.7.5-4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-2ubuntu0.1"}]}],"versions":["1.8.2-2build1","1.8.2-2build2","1.8.2-2build3","1.8.2-2build5"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.0-2ubuntu0.1~esm2"}]}],"versions":["1.8.2-3.1","1.8.2-4","1.8.2-4build1","1.8.2-4build3","1.9.0-2build2","1.9.0-2build3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2-3ubuntu0.1+esm3"}]}],"versions":["1.0-5","1.0-5build1","1.2-1","1.2-2","1.2-3","1.2-3build1","1.2-3ubuntu0.1","1.2-3ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.3-1ubuntu0.2+esm2"}]}],"versions":["1.6.1-1","1.6.1-1build1","1.6.1-2","1.6.2-1","1.6.2-2","1.6.2-2build1","1.6.3-1","1.6.3-1ubuntu0.1","1.6.3-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.6-1ubuntu0.2+esm2"}]}],"versions":["1.6.5-2build2","1.6.5-2build3","1.6.5-2build4","1.6.5-2build5","1.6.6-1","1.6.6-1ubuntu0.1","1.6.6-1ubuntu0.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.5-4ubuntu0.1~esm2"}]}],"versions":["1.7.4-7","1.7.4-7build1","1.7.5-1","1.7.5-2","1.7.5-2build1","1.7.5-2build2","1.7.5-2build3","1.7.5-3","1.7.5-3build1","1.7.5-4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.2-2ubuntu0.1"}]}],"versions":["1.8.2-2build1","1.8.2-2build2","1.8.2-2build3","1.8.2-2build5"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.0-2ubuntu0.1~esm2"}]}],"versions":["1.8.2-3.1","1.8.2-4","1.8.2-4build1","1.8.2-4build3","1.9.0-2build2","1.9.0-2build3"]},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP6","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-bp156.2.3.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.6","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-bp156.2.3.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"znc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.1-1.1"}]}]}],"products":[{"vendor":"znc","product":"znc"}],"references":[{"url":"https://wiki.znc.in/Category:ChangeLog","tags":["x_transferred","web","report"]},{"url":"https://github.com/znc/znc/releases/tag/znc-1.9.1","tags":["x_transferred","web","report"]},{"url":"https://wiki.znc.in/ChangeLog/1.9.1","tags":["x_transferred","web","report"]},{"url":"https://www.openwall.com/lists/oss-security/2024/07/03/9","tags":["x_transferred","web","report"]},{"url":"http://www.openwall.com/lists/oss-security/2024/07/03/9","tags":["mailing-list","x_transferred","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39844","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qh94-pjxq-88v7"},{"url":"https://security.alpinelinux.org/vuln/CVE-2024-39844","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39844.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2024-39844","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2024-0257.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=33364","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-39844","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-39844","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-6990-1","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/7QQ7R7LSWLXD4TDRUDSD57JQTEXMFSMH/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1227393","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2024-39844","tags":["web"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-39844","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T00:00:00Z","modified":"2024-08-02T04:26:16.015Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:34:19.28149Z"}],"euvd":[{"id":"EUVD-2024-38265","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T00:00:00Z","modified":"2024-08-02T04:26:16Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T03:50:17.469599Z"}],"ghsa":[{"id":"GHSA-qh94-pjxq-88v7","title":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T18:48:27Z","modified":"2024-07-08T15:31:55Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:57:39.292896Z"}],"nvd":[{"id":"CVE-2024-39844","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T17:15:04.403Z","modified":"2026-06-17T07:42:54.58Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:10:10.545705Z"}],"osv":[{"id":"ALPINE-CVE-2024-39844","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T17:15:04.403Z","modified":"2026-11-03T06:32:08.607955546Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T07:18:15.355745Z"},{"id":"CVE-2024-39844","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T00:00:00Z","modified":"2026-10-28T02:30:46.4909676Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:41.618074Z"},{"id":"DEBIAN-CVE-2024-39844","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T17:15:04.403Z","modified":"2026-11-02T12:02:37.758019099Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:43.156294Z"},{"id":"UBUNTU-CVE-2024-39844","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a KICK.","status":"published","published":"2024-07-03T17:15:00Z","modified":"2026-04-22T14:58:41.418238Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:54:54.69008Z"},{"id":"DSA-5725-1","title":"znc - security update","status":"published","published":"2024-07-03T00:00:00Z","modified":"2026-03-09T02:09:00.361068Z","updated_at":"2026-11-02T15:46:17.892347Z"},{"id":"MGASA-2024-0257","title":"Updated znc packages fix security vulnerability","description":"In ZNC before 1.9.1, remote code execution can occur in modtcl via a\nKICK. (CVE-2024-39844)\n","status":"published","published":"2024-07-05T16:28:37Z","modified":"2026-04-16T04:43:10.343483887Z","updated_at":"2026-11-02T15:49:42.684501Z"},{"id":"openSUSE-SU-2024:0203-1","title":"Security update for znc","description":"This update for znc fixes the following issues:\n\nUpdate to 1.9.1 (boo#1227393, CVE-2024-39844)\n\n  * This is a security release to fix CVE-2024-39844: remote code\n    execution vulnerability in modtcl.\n    To mitigate this for existing installations, simply unload the\n    modtcl module for every user, if it's loaded. Note that only\n    users with admin rights can load modtcl at all.\n  * Improve tooltips in webadmin.\n","status":"published","published":"2024-07-17T12:06:08Z","modified":"2026-02-04T03:53:32.643217Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"openSUSE-SU-2024:14115-1","title":"znc-1.9.1-1.1 on GA media","description":"These are all security issues fixed in the znc-1.9.1-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-07-08T00:00:00Z","modified":"2026-02-04T02:51:17.883669Z","updated_at":"2026-11-02T16:58:36.662953Z"},{"id":"USN-6990-1","title":"znc vulnerability","description":"Johannes Kuhn (DasBrain) discovered that znc incorrectly handled\nuser input under certain operations. An attacker could possibly\nuse this issue to execute arbitrary code on a user's system if\nthe user was tricked into joining a malicious server.\n","status":"published","published":"2024-09-04T18:37:47Z","modified":"2026-06-29T13:46:59.337155282Z","updated_at":"2026-11-02T16:58:18.876384Z"}]}}