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CVE-2018-15686

systemd: reexec state injection: fgets() on overlong lines leads to line splitting

Published: Oct 26, 2018Updated: Jun 9, 2025 Sources: CVE List NVD BDUCWE-502
NVD MITRE
7.8CVSSHIGH
EPSS Score
2.3%
Top 19.1%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available

Description

A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. Affected releases are systemd versions up to and including 239.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-502

Affected Products

ubuntu linuxcanonical
On-premOS
Operating Systems / linux-distro
debian linuxdebian
On-premOS
Operating Systems / linux-distro
systemdsystemd project
On-prem
Operating Systems / linux-distro
communications cloud native core network function cloud native environmentoracle
On-premDatabase
Databases / data-warehouse-analytics
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
canonicalcommercialGBOperating Systemsaka canonical ltd.
debianoss-projectGBOperating Systemsaka debian gnu/linux
systemd projectoss-projectOperating Systemsaka systemd
oraclecommercialUSDatabasesaka oracle corp.
red hat inc.commercialUSOperating Systemsaka red hat
and 6 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

http://www.securityfocus.com/bid/105747
securityfocus.com
https://access.redhat.com/errata/RHSA-2019:2091
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:3222
access.redhat.com
and 10 more references View all →

Timeline

Published
Oct 26, 2018
Last Updated
Jun 9, 2025

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