Cyber 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 55th percentile
Risk Priority 58 floored blend · peak EPSS

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 Content Injection (T1659); ranked in the top 45% 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

T1659 Content Injection Initial Access
Adversaries may gain access and continuously communicate with victims by injecting malicious content into systems through online network traffic.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-38865Same product: Checkmk Checkmk
CVE-2023-6157Same product: Checkmk Checkmk
CVE-2024-6542Same product: Checkmk Checkmk
CVE-2025-32918Same product: Checkmk Checkmk
CVE-2026-33457Same product: Checkmk Checkmk
CVE-2026-33456Same product: Checkmk Checkmk
CVE-2026-33455Same product: Checkmk Checkmk
CVE-2023-6251Same product: Checkmk Checkmk
CVE-2025-39664Same product: Checkmk Checkmk
CVE-2024-28828Same 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 mostly match
prevents

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.8.29 Security testing in development and acceptance mostly match
finds

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

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle incorporates practices that reduce the likelihood of delimiter-neutralization defects.

A.8.26 Application security requirements partial match
prevents

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

A.8.28 Secure coding partial match
prevents

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

References