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VULNERABILITIES

CVE-2017-18078 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html CVEMailing ListThird Party Advisory
http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html CVEExploitThird Party AdvisoryVDB Entry
https://github.com/systemd/systemd/issues/7736 CVEExploitIssue TrackingThird Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E CVE
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E CVE

see all 18 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-59Improper Link Resolution Before File Access ('Link Following')[email protected]

Affected Products

ProductVersions
systemd project systemd
< 237

CPE

  • cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
8.0

CPE

  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
opensuse leap
42.3

CPE

  • cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

13 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2017-18078
NVD Published Date:
Jan 29, 2018
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2017-18078 Details - Not Deferred