Security Resilience

CVE-2023-6156

Checkmk 2.0.0 … 2.2.0

Published
22 November 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.6
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
EPSS Score 0.0086 58th percentile
Risk Priority 58 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-6156 is a high-severity Improper Neutralization of Delimiters (CWE-140) vulnerability in Checkmk Checkmk. Its CVSS base score is 7.6 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Protocol or Service Impersonation (T1001.003); ranked in the top 42% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

Improper neutralization of livestatus command delimiters in the availability timeline in Checkmk <= 2.0.0p39, < 2.1.0p37, and < 2.2.0p15 allows arbitrary livestatus command execution for authorized users.

CWE(s)
CWE-140NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.003 Protocol or Service Impersonation Command And Control
Adversaries may impersonate legitimate protocols or web service traffic to disguise command and control activity and thwart analysis efforts.
attack.mitre.org →
T1003 OS Credential Dumping Credential Access
Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password.
attack.mitre.org →
T1003.001 LSASS Memory Credential Access
Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).
attack.mitre.org →
T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-32918Same product: Checkmk Checkmk
CVE-2024-6542Same product: Checkmk Checkmk
CVE-2023-6157Same product: Checkmk Checkmk
CVE-2026-33455Same product: Checkmk Checkmk
CVE-2026-33457Same product: Checkmk Checkmk
CVE-2024-38865Same product: Checkmk Checkmk
CVE-2026-33456Same product: Checkmk Checkmk
CVE-2024-2380Same product: Checkmk Checkmk
CVE-2023-23548Same product: Checkmk Checkmk
CVE-2024-5741Same product: Checkmk Checkmk

Affected Assets

checkmk
checkmk
2.0.0, 2.1.0, 2.2.0

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 partial match
blocks

Secure SDLC practices directly require proper delimiter neutralization during input handling and output encoding.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.19 Installation of software on operational systems partial match
removes
A.8.25 Secure development life cycle partial match
blocks

A.8.25 mandates secure SDLC practices including secure coding guidelines, security requirements, testing (scans/penetration), and developer training that reach improper neutralization of delimiters, but leaves a bounded remainder (e.g. inconsistent application across outsourced development, incomplete coverage of all languages or legacy code, and non-mandatory enforcement of the full set of practices).

A.8.26 Application security requirements partial match
blocks

Application security requirements include input validation and output encoding that mitigate delimiter mishandling.

A.8.27 Secure system architecture and engineering principles partial match
removes
A.8.28 Secure coding partial match
prevents

Secure coding explicitly requires proper neutralization of delimiters to prevent injection and parsing flaws.

A.8.29 Security testing in development and acceptance partial match
finds

Security testing in development and acceptance can detect delimiter-related weaknesses before deployment.

References