How severe is CVE-2017-12847?

CVE-2017-12847 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2017-12847 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12847?

CVE-2017-12847 affects Nagios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12847?

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

When was CVE-2017-12847 published?

CVE-2017-12847 was published on 2017-08-23 and last updated on 2026-06-17.

CVE-2017-12847

CVE-2017-12847 is a medium-severity vulnerability in Nagios with a CVSS 3.x base score of 6.3. 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-665.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-665
Affected product: Nagios
Published: 2017-08-23
Last modified: 2026-06-17

Description

Nagios Core before 4.3.3 creates a nagios.lock 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 nagios.lock modification before a root script executes a "kill `cat /pathname/nagios.lock`" command.

Frequently asked questions

What is CVE-2017-12847?: Nagios Core before 4.3.3 creates a nagios.lock 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 nagios.lock modification before a root script executes a "kill `cat /pathname/nagios.lock`" command.
How severe is CVE-2017-12847?: CVE-2017-12847 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2017-12847 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12847?: CVE-2017-12847 affects Nagios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12847?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-12847 published?: CVE-2017-12847 was published on 2017-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nagios:nagios:*:*:*:*:*:*:*:*

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