Icinga icinga2 up to 2.12.11/2.13.11/2.14.5 VerifyCertificate improper following of a certificate's chain of trust

Summaryinfo

A vulnerability was found in Icinga icinga2 up to 2.12.11/2.13.11/2.14.5 and classified as critical. This affects the function VerifyCertificate. Executing a manipulation can lead to improper following of a certificate's chain of trust. The identification of this vulnerability is CVE-2025-48057. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Icinga icinga2 up to 2.12.11/2.13.11/2.14.5. This vulnerability affects the function VerifyCertificate. The manipulation with an unknown input leads to a improper following of a certificate's chain of trust vulnerability. The CWE definition for the vulnerability is CWE-296. The product does not follow, or incorrectly follows, the chain of trust for a certificate back to a trusted root certificate, resulting in incorrect trust of any resource that is associated with that certificate. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-48057 since 05/15/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1557.003.

The vulnerability scanner Nessus provides a plugin with the ID 278689 (SUSE SLES12 Security Update : icinga2 (SUSE-SU-2025:02783-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.12.12, 2.13.12 or 2.14.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (278689). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Icinga

Name

• icinga2

Version

• 2.12.0
• 2.12.1
• 2.12.2
• 2.12.3
• 2.12.4
• 2.12.5
• 2.12.6
• 2.12.7
• 2.12.8
• 2.12.9
• 2.12.10
• 2.12.11
• 2.13.0
• 2.13.1
• 2.13.2
• 2.13.3
• 2.13.4
• 2.13.5
• 2.13.6
• 2.13.7
• 2.13.8
• 2.13.9
• 2.13.10
• 2.13.11
• 2.14.0
• 2.14.1
• 2.14.2
• 2.14.3
• 2.14.4
• 2.14.5

Website

• Product: https://github.com/Icinga/icinga2/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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