Systemd
CVE-2019-3844
HIGH
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V8 - Authorization Privilege chaining prevention
|
| Impact | CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available.
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.
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Technical ContextAI · show details
This vulnerability is classified under CWE-268. It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled. Affected products include: Systemd Project Systemd, Canonical Ubuntu Linux, Netapp Hci Management Node, Netapp Snapprotect, Netapp Solidfire.
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Exploit-DB
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
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
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 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
A use-after-free vulnerability was found in systemd. Rated critical severity (CVSS 9.8), this vulnerability is remotely
GitHub PoC