Home/CVE/A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary
CVE

CVE-2018-15687

A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary

A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239.

HIGH · CVSS 7 EPSS 0.00379
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
▤

Affected Products & Versions

2
canonical ubuntu linuxall versions
systemd project systemd>= 235 and < 240
⚠

Public Exploits & PoCs

2
localsystemd - 'chown_one()' Dereference Symlinksverified
pocwww.exploit-db.com · 45715www.exploit-db.com
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumSystemd Service Creation
▣

Scoring & Timeline

7
HIGH · CVSS v3.1 · security@ubuntu.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Oct 2018 · 02:29 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2024:11420-1
msrcCVE-2018-15687
usnUSN-3816-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/105748Broken LinkThird Party AdvisoryVDB Entry
https://github.com/systemd/systemd/pull/10517/commitsPatchThird Party Advisory
https://security.gentoo.org/glsa/201810-10Third Party Advisory
https://usn.ubuntu.com/3816-1/Third Party Advisory
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