UBUNTU-CVE-2026-63418 (CVE-2026-63418)
Vulnerability from osv_ubuntu – Published: 2026-11-03 18:18 – Updated: 2026-11-03 18:18 – Source website
VLAI
Details
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
7.0 (High)
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "nagios-plugins",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "nagios-plugins-basic",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "nagios-plugins-common",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "nagios-plugins-extra",
"binary_version": "2.1.2-2ubuntu2"
},
{
"binary_name": "nagios-plugins-standard",
"binary_version": "2.1.2-2ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.1.2-2ubuntu2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1.2-2ubuntu1",
"2.1.2-2ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "nagios-plugins",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "nagios-plugins-basic",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "nagios-plugins-common",
"binary_version": "2.2-3ubuntu3.18.04.1"
},
{
"binary_name": "nagios-plugins-standard",
"binary_version": "2.2-3ubuntu3.18.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.2-3ubuntu3.18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2-3ubuntu1",
"2.2-3ubuntu2",
"2.2-3ubuntu3",
"2.2-3ubuntu3.18.04.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.2-6ubuntu1.2"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.2-6ubuntu1.2"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.2-6ubuntu1.2"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.2-6ubuntu1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.2-6ubuntu1.2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2-6build2",
"2.2-6ubuntu1",
"2.2-6ubuntu1.1",
"2.2-6ubuntu1.2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.3.1-1ubuntu4"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.3.1-1ubuntu4"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.3.1-1ubuntu4"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.3.1-1ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.3.1-1ubuntu4?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.1-1ubuntu2",
"2.3.1-1ubuntu3",
"2.3.1-1ubuntu4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.3.5-1ubuntu3"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.3.5-1ubuntu3"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.3.5-1ubuntu3"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.3.5-1ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.3.5-1ubuntu3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.3-6ubuntu1",
"2.3.5-1ubuntu1",
"2.3.5-1ubuntu2",
"2.3.5-1ubuntu3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.4.0-1ubuntu4"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.4.0-1ubuntu4"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.4.0-1ubuntu4"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.4.0-1ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.4.0-1ubuntu4?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.0-1ubuntu2",
"2.4.0-1ubuntu4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "monitoring-plugins",
"binary_version": "2.4.0-1ubuntu2"
},
{
"binary_name": "monitoring-plugins-basic",
"binary_version": "2.4.0-1ubuntu2"
},
{
"binary_name": "monitoring-plugins-common",
"binary_version": "2.4.0-1ubuntu2"
},
{
"binary_name": "monitoring-plugins-standard",
"binary_version": "2.4.0-1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "monitoring-plugins",
"purl": "pkg:deb/ubuntu/monitoring-plugins@2.4.0-1ubuntu2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.0-1ubuntu1",
"2.4.0-1ubuntu2"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-63418",
"modified": "2026-11-03T18:18:00Z",
"published": "2026-11-03T18:18:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-63418"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-63418"
},
{
"type": "REPORT",
"url": "https://github.com/monitoring-plugins/monitoring-plugins/security/advisories/GHSA-xvvw-4j77-rp7q"
},
{
"type": "REPORT",
"url": "https://github.com/monitoring-plugins/monitoring-plugins/commit/c35c12e58d326ffbd6cfb3c9097653f9f3fb2f4a"
},
{
"type": "REPORT",
"url": "https://github.com/monitoring-plugins/monitoring-plugins/releases/tag/v3.0.1"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-63418"
]
}
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