Monitoring Plugins check_icmp: -H argument count overflow leads in setuid-root binary
CVSS score
7.0
EPSS probability
—
Risk score
0.7
Published
3 h ago
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Impact on My Inventory
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
The check_icmp component in Monitoring Plugins suffers from an integer overflow when more than 65,535 hosts are supplied via -H or --extra-opts files. This can allow a local attacker to corrupt heap memory on installations where check_icmp is configured as setuid root.
A local low-privileged attacker can corrupt heap memory while the process retains root privileges on vulnerable setuid installations. Reliable privilege escalation has not been demonstrated, and installations using cap_net_raw file capabilities are not exposed.
What should be done?
- Upgrade to version 3.0.1 or later
- Use cap_net_raw file capabilities instead of setuid
- Follow vendor advisory instructions
Chain of evidence and sources
check_icmp bileşeni, 65.535'ten fazla host girildiğinde sayacın sarmasına neden olan bir tamsayı taşması barındırır.
setuid root kurulumlarında, düşük ayrıcalıklı yerel bir saldırgan süreç hâlâ root yetkilerine sahipken heap belleği bozabilir.
cap_net_raw dosya yeteneklerini kullanan kurulumlar yetki yükseltme sonucuna karşı korunmaktadır.
Show the technical text from the sources
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.
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-190, CWE-787
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-63418 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | monitoring-plugins | monitoring-plugins | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.0 | CVSS V3_1 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CVE CNA |
| 7.0 | CVSS V31 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-63418 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-63418 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
CVSS Vector Radar Chart
7.0 / 10Vulnerability Scoring Details
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HYama durumu bilinmiyor
Weakness Type (CWE & CAPEC)
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