DEBIAN-CVE-2017-18078

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Source
https://security-tracker.debian.org/tracker/CVE-2017-18078
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2017-18078.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2017-18078
Upstream
Published
2018-01-29T05:29:00Z
Modified
2025-09-25T22:40:26Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
237-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Debian:12 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
237-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Debian:13 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
237-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Debian:14 / systemd

Package

Name
systemd
Purl
pkg:deb/debian/systemd?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
237-1

Ecosystem specific 

{
    "urgency": "unimportant"
}