How severe is CVE-2017-18188?

CVE-2017-18188 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 high, integrity none, and availability none.

Is CVE-2017-18188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18188?

CVE-2017-18188 affects Openr Opentmpfiles. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18188?

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

When was CVE-2017-18188 published?

CVE-2017-18188 was published on 2018-02-14 and last updated on 2026-06-17.

CVE-2017-18188

CVE-2017-18188 is a medium-severity vulnerability in Openr Opentmpfiles 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Openr Opentmpfiles
Published: 2018-02-14
Last modified: 2026-06-17

Description

OpenRC opentmpfiles through 0.1.3, when the fs.protected_hardlinks sysctl is turned off, allows local users to obtain ownership of arbitrary files by creating a hard link inside a directory on which "chown -R" will be run.

Frequently asked questions

What is CVE-2017-18188?: OpenRC opentmpfiles through 0.1.3, when the fs.protected_hardlinks sysctl is turned off, allows local users to obtain ownership of arbitrary files by creating a hard link inside a directory on which "chown -R" will be run.
How severe is CVE-2017-18188?: CVE-2017-18188 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 high, integrity none, and availability none.
Is CVE-2017-18188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18188?: CVE-2017-18188 affects Openr Opentmpfiles. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18188?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-18188 published?: CVE-2017-18188 was published on 2018-02-14 and last updated on 2026-06-17.

References

https://github.com/OpenRC/opentmpfiles/issues/3

Affected products (1)

cpe:2.3:a:openr:opentmpfiles:*:*:*:*:*:*:*:*

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