How severe is CVE-2018-6536?

CVE-2018-6536 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-6536 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6536?

CVE-2018-6536 affects Icinga. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6536?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-6536 published?

CVE-2018-6536 was published on 2018-02-02 and last updated on 2026-06-17.

CVE-2018-6536

CVE-2018-6536 is a medium-severity vulnerability in Icinga with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-732.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.9
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Icinga
Published: 2018-02-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-6536?: 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.
How severe is CVE-2018-6536?: CVE-2018-6536 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-6536 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6536?: CVE-2018-6536 affects Icinga. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6536?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-6536 published?: CVE-2018-6536 was published on 2018-02-02 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*

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