CVE-2025-48057

Critical

Description

Icinga 2 is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. Prior to versions 2.12.12, 2.13.12, and 2.14.6, the VerifyCertificate() function can be tricked into incorrectly treating certificates as valid. This allows an attacker to send a malicious certificate request that is then treated as a renewal of an already existing certificate, resulting in the attacker obtaining a valid certificate that can be used to impersonate trusted nodes. This only occurs when Icinga 2 is built with OpenSSL older than version 1.1.0. This issue has been patched in versions 2.12.12, 2.13.12, and 2.14.6.

SeverityCritical
CVSS9.8
Exploit probability—
ProductIcinga
PublishedMay 27, 2025
First seenMay 27, 2025
Weakness typeCWE-296CWE-296

How to fix

Update
  • icinga icinga2.12.12, 2.13.12, 2.14.6 or later

Affected products

ProductAffected versionsFixed in
icinga icingav < 2.12.12, 2.13.0 ≤ v < 2.13.12, 2.14.0 ≤ v < 2.14.62.12.12, 2.13.12, 2.14.6

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