HOMEVULNERABILITIESCVE-2018-6536
MEDIUM

CVE-2018-6536

CWE-732Published: February 2, 2018· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for icinga2.pid modification before a root script executes a "kill `cat /pathname/icinga2.pid`" command, as demonstrated by icinga2.init.d.cmake.

NVD Source

Technical Analysis

CVE-2018-6536 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

icinga1 product(s)
icinga
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/Icinga/icinga2/issues/5991
ADVISORYhttps://github.com/Icinga/icinga2/issues/5991

All References (2)

→
https://github.com/Icinga/icinga2/issues/5991Issue Tracking · Third Party Advisory
→
https://github.com/Icinga/icinga2/issues/5991Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2018-6536
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-732
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 2, 2018

Related CVEs (CWE-732)

CVE-2025-12004
10.0
CVE-2026-9508
10.0
CVE-2014-125121
10.0
CVE-2024-5618
9.9
CVE-2025-49131
9.9
CVE-2021-33509
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-6536 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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