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NVD / CVE Program· CNA Checkmk

CVE-2024-6542: Livestatus injection in mknotifyd

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.47% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Checkmk GmbH Checkmk 2.1.0p47, 2.2.0p32, 2.3.0p11.

Low priority for now. Upgrade to Checkmk GmbH Checkmk 2.1.0p47, 2.2.0p32, 2.3.0p11 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper neutralization of livestatus command delimiters in mknotifyd in Checkmk <= 2.0.0p39, < 2.1.0p47, < 2.2.0p32 and < 2.3.0p11 allows arbitrary livestatus command execution.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Jul 22, 2024
Updated
Jun 17, 2026
EPSS
0.4% · 41th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.5
CNA · Checkmk
6.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-6542

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
checkmkcheckmk

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • checkmk checkmk2.0.0
  • checkmk checkmk2.1.0
  • checkmk checkmk2.2.0
  • checkmk checkmk2.3.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Checkmk). Independent of NVD's CPE analysis and usually ahead of it.

  • Checkmk GmbH Checkmk

    • 2.3.0 and later · before 2.3.0p11affected · semver
    • 2.2.0 and later · before 2.2.0p32affected · semver
    • 2.1.0 and later · before 2.1.0p47affected · semver
    • 2.0.0 and later · up to and including 2.0.0p39affected · semver

Same product

checkmk: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-28825Brute-force protection ineffective for some login methods
    39Monitor
  • CVE-2022-48317Insecure Termination of RestAPI Session Tokens
    39Monitor
  • CVE-2025-39666omd: Local privilege escalation when executing omd commands as root
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-28827Jul 10, 2024 · Privilege escalation in Windows agent
    31Monitor
  • ← EarlierCVE-2024-28828Jul 10, 2024 · 1-Click compromize via CSRF
    35Monitor
  • Later →CVE-2024-28829Aug 20, 2024 · Privilege escalation in mk_informix plugin
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Checkmk GmbH Checkmk2.1.0p47Vendor (CNA)
Checkmk GmbH Checkmk2.2.0p32Vendor (CNA)
Checkmk GmbH Checkmk2.3.0p11Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-6156243 days apartLivestatus injection in availability timeline
    35Monitor
  • CVE-2023-6157243 days apartLivestatus injection in ajax_search
    35Monitor
  • CVE-2023-31208432 days apartLivestatus command injection in RestAPI
    35Monitor
  • CVE-2024-38865262 days apartLivestatus command injection in RestAPI
    24Monitor
  • CVE-2025-32918347 days apartLivestatus injection in autocomplete endpoint
    21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-140 · Improper Neutralization of Delimiters

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records