CVE-2024-49369Network attack vector

Unauthenticated node impersonation via cached TLS validity

Published Nov 12, 2024 · Updated Nov 3, 2025

Improper certificate validation in Icinga 2 allows remote attackers to impersonate trusted cluster nodes or certificate-authenticated API users. The TLS stream cached certificate validity during set_verify_callback() instead of querying the completed handshake, peer certificate, and OpenSSL result. Network access to the API or cluster port is sufficient; affected permissions can expose data, inject configuration, or permit command execution.

CVSS severity9.8
Critical
EPSS probability2.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Icinga 2 allows remote attackers to impersonate trusted cluster nodes or certificate-authenticated API users. The TLS stream cached certificate validity during set_verify_callback() instead of querying the completed handshake, peer certificate, and OpenSSL result. Network access to the API or cluster port is sufficient; affected permissions can expose data, inject configuration, or permit command execution.

The record

CVE
CVE-2024-49369
Published
Nov 12, 2024
Updated
Nov 3, 2025
Vendor
Icinga
Product
Icinga 2
Classifications
CWE-295, CAPEC-475, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.12.0, < 2.12.11
  2. Affected versionversion=>= 2.13.0, < 2.13.10
  3. Affected versionversion=>= 2.14.0, < 2.14.3
  4. Affected versionversion=>= 2.4.0, < 2.11.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Icinga · Icinga 2version=>= 2.12.0, < 2.12.11; version=>= 2.13.0, < 2.13.10; version=>= 2.14.0, < 2.14.3; version=>= 2.4.0, < 2.11.12
Icinga · Icinga Web 2version=2.12.0 <2.12.11; version=2.13.0 <2.13.10; version=2.14.0 <2.14.3; version=2.4.0 <2.11.12

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CAPEC-475Signature Spoofing by Improper Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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