{"id":"CVE-2026-63418","aliases":["EUVD-2026-116114","GHSA-xvvw-4j77-rp7q","UBUNTU-CVE-2026-63418"],"status":"published","title":"Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binary","description":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00139,"percentile":0.03321,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190","CWE-787"],"published":"2026-11-03T18:06:25Z","modified":"2026-11-05T11:46:35Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-2ubuntu1","2.1.2-2ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2-3ubuntu1","2.2-3ubuntu2","2.2-3ubuntu3","2.2-3ubuntu3.18.04.1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2-6build2","2.2-6ubuntu1","2.2-6ubuntu1.1","2.2-6ubuntu1.2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.1-1ubuntu2","2.3.1-1ubuntu3","2.3.1-1ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.3-6ubuntu1","2.3.5-1ubuntu1","2.3.5-1ubuntu2","2.3.5-1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-1ubuntu2","2.4.0-1ubuntu4"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"monitoring-plugins","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-1ubuntu1","2.4.0-1ubuntu2"]}],"products":[{"vendor":"linuxfabrik","product":"monitoring-plugins"},{"vendor":"monitoring-plugins","product":"monitoring-plugins"}],"references":[{"url":"https://github.com/monitoring-plugins/monitoring-plugins/security/advisories/GHSA-xvvw-4j77-rp7q","tags":["x_refsource_CONFIRM","advisory","report"]},{"url":"https://github.com/monitoring-plugins/monitoring-plugins/commit/c35c12e58d326ffbd6cfb3c9097653f9f3fb2f4a","tags":["x_refsource_MISC","fix","report"]},{"url":"https://github.com/monitoring-plugins/monitoring-plugins/releases/tag/v3.0.1","tags":["x_refsource_MISC","web","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63418.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63418","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-63418","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63418","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-63418","title":"Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binary","description":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","status":"published","published":"2026-11-03T18:06:25.699Z","modified":"2026-11-03T22:40:52.744Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-190","CWE-787"],"updated_at":"2026-11-03T23:33:09.822755Z"}],"euvd":[{"id":"EUVD-2026-116114","description":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","status":"published","published":"2026-11-03T18:06:25Z","modified":"2026-11-03T22:40:52Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T00:49:23.174177Z"}],"nvd":[{"id":"CVE-2026-63418","description":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","status":"published","published":"2026-11-03T18:18:03.533Z","modified":"2026-11-03T23:17:51.067Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-190","CWE-787"],"updated_at":"2026-11-04T01:48:44.629778Z"}],"osv":[{"id":"CVE-2026-63418","title":"Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binary","description":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","status":"published","published":"2026-11-03T18:06:25.699Z","modified":"2026-11-05T08:04:55.65662702Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-190","CWE-787"],"updated_at":"2026-11-05T09:08:14.330889Z"},{"id":"UBUNTU-CVE-2026-63418","description":"Monitoring Plugins is a suite of plugins for monitoring applications. From 3.0.0-rc1 until 3.0.1, check_icmp stores the number of hosts supplied through -H or --Host on the command line, or through --extra-opts files containing Host= entries, in an unsigned short. More than 65,535 hosts wrap the counter, causing process_arguments() to allocate an undersized hosts array and then write subsequent entries out of bounds before main() calls setuid(getuid()). On installations where check_icmp is setuid root, a local low-privileged attacker can corrupt heap memory while the process still has root privileges; reliable privilege escalation has not been demonstrated. Installations that use cap_net_raw file capabilities instead of setuid are not exposed to the privilege-escalation consequence. This issue is fixed in version 3.0.1.","status":"published","published":"2026-11-03T18:18:00Z","modified":"2026-11-05T11:46:35.844934363Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-05T13:30:15.321876Z"}]}}