Systemd
CVE-2018-1049
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V15 - Secure Coding and Architecture Concurrency control, locking
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAI
In systemd prior to 234 a race condition exists between .mount and .automount units such that automount requests from kernel may not be serviced by systemd resulting in kernel holding the mountpoint. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-362. In systemd prior to 234 a race condition exists between .mount and .automount units such that automount requests from kernel may not be serviced by systemd resulting in kernel holding the mountpoint and any processes that try to use said mount will hang. A race condition like this may lead to denial of service, until mount points are unmounted. Affected products include: Systemd Project Systemd, Redhat Enterprise Linux, Redhat Enterprise Linux Aus, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server. Version information: prior to 234.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
In systemd prior to 234 a race condition exists between .mount and .automount units such that automount requests from kernel may not be serviced by systemd resulting in kernel holding the mountpoint and any processes that try to use said mount will hang. A race condition like this may lead to denial of service, until mount points are unmounted.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Race conditions occur when multiple concurrent requests exploit the brief time gap between checking a condition and acting upon it (TOCTOU - Time of Check, Time of Use).
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
Stack-based buffer overflow in the getpwnam and getgrnam functions of the NSS module nss-mymachines in systemd. Rated cr
Integer overflow in the valid_user_field function in journal/journald-native.c in systemd allows remote attackers to cau
systemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible su
A flaw in systemd v228 in /src/basic/fs-util.c caused world writable suid files to be created when using the systemd tim
It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of
It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allo
A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution
systemd-tmpfiles in systemd through 237 mishandles symlinks present in non-terminal path components, which allows local
basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Val
In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using t
A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary
systemd v233 and earlier fails to safely parse usernames starting with a numeric digit (e.g. Rated critical severity (CV
GitHub PoC
Exploit-DB