{"id":"CVE-2018-13458","aliases":["DEBIAN-CVE-2018-13458","EUVD-2018-5396","GHSA-9fx5-wc5q-367p","MGASA-2019-0104","openSUSE-SU-2020:0500-1","openSUSE-SU-2020:0517-1"],"status":"published","title":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability,...","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.04453,"percentile":0.9148,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-476"],"published":"2018-07-12T18:00:00Z","modified":"2026-10-24T10:30:43Z","exploits":[{"source":"exploitdb","id":"EDB-45082","title":"Nagios Core 4.4.1 - Denial of Service","type":"dos","platform":"linux","date":"2018-07-24","url":"https://www.exploit-db.com/exploits/45082"}],"fixes":[{"ecosystem":"Debian:12","package":"nagios4","fixed_in":["4.3.4-3"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"nagios4","fixed_in":["4.3.4-3"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"nagios4","fixed_in":["4.3.4-3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"nagios4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.4-3"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"nagios4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.4-3"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"nagios4","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.4-3"}]}]},{"source":"osv","ecosystem":"Mageia:6","package":"nagios","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-2.2.mga6"}]}],"bundled":4},{"source":"osv","ecosystem":"openSUSE:Leap 15.1","package":"nagios","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.5-lp151.5.4.1"}]}],"bundled":5},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP1","package":"nagios","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.5-bp151.4.3.1"}]}],"bundled":5}],"products":[{"vendor":"nagios","product":"nagios_core"}],"references":[{"url":"https://knowledge.opsview.com/v5.4/docs/whats-new","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://gist.github.com/fakhrizulkifli/40f3daf52950cca6de28ebec2498ff6e","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://www.exploit-db.com/exploits/45082/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred","Exploit","Third Party Advisory","VDB Entry","evidence"]},{"url":"https://knowledge.opsview.com/v5.3/docs/whats-new","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00014.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00022.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-13458"},{"url":"https://github.com/advisories/GHSA-9fx5-wc5q-367p"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-13458","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2019-0104.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=24290","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/3EGOZ3JA6TL3YUZ3XWYQ47OYQAJTWOTL/","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/HKTKWPRP5BSNBXHHJ3JC2CHRRZALRC26/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1028975","tags":["report"]},{"url":"https://bugzilla.suse.com/1119832","tags":["report"]},{"url":"https://bugzilla.suse.com/1156309","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-13441","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-13457","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-13458","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-18245","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-3698","tags":["web"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/G5J75GK25DTTK4SXS4VCSBZ3KBQ2JPAU/","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2018-13458","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","status":"published","published":"2018-07-12T18:00:00Z","modified":"2024-08-05T09:00:35.067Z","updated_at":"2026-11-02T14:35:07.01498Z"}],"euvd":[{"id":"EUVD-2018-5396","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","status":"published","published":"2018-07-12T18:00:00Z","modified":"2024-08-05T09:00:35Z","updated_at":"2026-11-03T02:39:50.070155Z"}],"ghsa":[{"id":"GHSA-9fx5-wc5q-367p","title":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability,...","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","status":"published","published":"2022-05-13T01:27:25Z","modified":"2023-02-01T05:07:53Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:50:37.729708Z"}],"nvd":[{"id":"CVE-2018-13458","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","status":"published","published":"2018-07-12T18:29:00.497Z","modified":"2026-06-17T01:39:25.83Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:04:32.929986Z"}],"osv":[{"id":"CVE-2018-13458","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","status":"published","published":"2018-07-12T18:29:00.497Z","modified":"2026-10-24T10:30:43.004871342Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:08.242347Z"},{"id":"DEBIAN-CVE-2018-13458","description":"qh_core in Nagios Core 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attackers to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.","status":"published","published":"2018-07-12T18:29:00.497Z","modified":"2026-10-23T18:02:59.499366362Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:30.290351Z"},{"id":"MGASA-2019-0104","title":"Updated nagios packages fix security vulnerability","description":"A flaw was found in Nagios Core version 4.4.1 and earlier. The qh_help\nfunction is prone to a NULL pointer dereference vulnerability, which allows\nattacker to cause a local denial-of-service condition by sending a crafted\npayload to the listening UNIX socket (CVE-2018-13441).\n\nA flaw was found in Nagios Core version 4.4.1 and earlier. The qh_echo\nfunction is prone to a NULL pointer dereference vulnerability, which allows\nattacker to cause a local denial-of-service condition by sending a crafted\npayload to the listening UNIX socket (CVE-2018-13457).\n\nA flaw was found in Nagios Core version 4.4.1 and earlier. The qh_core\nfunction is prone to a NULL pointer dereference vulnerability, which allows\nattacker to cause a local denial-of-service condition by sending a crafted\npayload to the listening UNIX socket (CVE-2018-13458).\n\nA cross-site scripting (XSS) vulnerability has been discovered in Nagios\nCore. This vulnerability allows attackers to place malicious JavaScript\ncode into the web frontend through manipulation of plugin output. In order\nto do this the attacker needs to be able to manipulate the output returned\nby nagios checks, e.g. by replacing a plugin on one of the monitored\nendpoints. Execution of the payload then requires that an authenticated\nuser creates an alert summary report which contains the corresponding\noutput (CVE-2018-18245).\n","status":"published","published":"2019-03-07T16:34:45Z","modified":"2026-04-16T04:41:44.022906898Z","updated_at":"2026-11-02T15:49:40.793816Z"},{"id":"openSUSE-SU-2020:0500-1","title":"Security update for nagios","description":"This update for nagios to version 4.4.5 fixes the following issues:\n\n- CVE-2019-3698: Symbolic link following vulnerability in the cronjob allows \n  local attackers to cause cause DoS or potentially escalate privileges. (boo#1156309)\n- CVE-2018-18245: Fixed XSS vulnerability in Alert Summary report (boo#1119832)\n- CVE-2018-13441, CVE-2018-13458, CVE-2018-13457: Fixed a few denial of service \n  vulnerabilities caused by null pointer dereference (boo#1101293, boo#1101289, boo#1101290).\n","status":"published","published":"2020-04-11T10:16:04Z","modified":"2026-02-04T03:01:10.13453Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2020:0517-1","title":"Security update for nagios","description":"This update for nagios to version 4.4.5 fixes the following issues:\n\n- CVE-2019-3698: Symbolic link following vulnerability in the cronjob allows \n  local attackers to cause cause DoS or potentially escalate privileges. (boo#1156309)\n- CVE-2018-18245: Fixed XSS vulnerability in Alert Summary report (boo#1119832)\n- CVE-2018-13441, CVE-2018-13458, CVE-2018-13457: Fixed a few denial of service \n  vulnerabilities caused by null pointer dereference (boo#1101293, boo#1101289, boo#1101290).\n\nThis update was imported from the openSUSE:Leap:15.1:Update update project.","status":"published","published":"2020-04-14T16:11:03Z","modified":"2025-05-07T18:10:02.94632Z","updated_at":"2026-11-02T16:58:31.152112Z"}]}}