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 remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:02783-1 advisory.

    - CVE-2025-48057: A certificate incorrectly treated as valid can allow an attacker to impersonate a     trusted node (bsc#1243747).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-48057)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
278689	SUSE SLES12: icinga2 / icinga2-bin / icinga2-common / icinga2-doc / etc (SUSE-SU-2025:02783-1)	Nessus	SuSE Local Security Checks	critical
259487	Linux Distros Unpatched Vulnerability : CVE-2025-48057	Nessus	Misc.	critical

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CVE-2025-48057

critical

Tenable Plugins

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critical