Is CVE-2017-18078 actively exploited?

CVE-2017-18078 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2017-18078?

CVE-2017-18078 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2017-18078?

Patch guidance is available from systemd project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2017-18078.

Fix CVE-2017-18078 - HIGH systemd project systemd

Q: Which products are affected by CVE-2017-18078?

3 products: systemd project systemd, debian debian linux, opensuse leap.

Description

systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-59

Metadata

Primary Vendor: SYSTEMD_PROJECT
Published: 1/29/2018
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

systemd_project : systemddebian : debian_linuxopensuse : leap

Remediation Guidance

Executive Summary

Cite this page

CVE-2017-18078. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2017-18078

View on NIST NVD

CVE-2017-18078 vulnerability