CVE-2025-34135: nagios xi Permission Flaw — Fix

Description

Nagios XI versions prior to 2024R1.4.2 configure some systemd unit files with permission sets that were too permissive. In particular, the nagios.service unit had executable permissions that were not required. Overly permissive permissions on service unit files can broaden local attack surface by enabling unintended execution behaviors or facilitating abuse of service operations when combined with other weaknesses.

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CVSS v3.1 Score

4.4

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weakness Type (CWE)

CWE-732 CWE-732

Affected Products

Vendor	Product	Versions
nagios	nagios_xi	< 2024
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All
nagios	nagios_xi	All

References

Advisories & Patches

https://www.nagios.com/products/security/#nagios-xi

Other References

https://www.nagios.com/changelog/nagios-xi/ https://www.vulncheck.com/advisories/nagios-xi-overly-permissive-permissions-on-systemd-unit-files

Frequently Asked Questions

What is CVE-2025-34135? +

Nagios XI versions prior to 2024R1.4.2 configure some systemd unit files with permission sets that were too permissive. In particular, the nagios.service unit had executable permissions that were not required. Overly permissive permissions on service unit files can broaden local attack surface by enabling unintended execution behaviors or facilitating abuse of service operations when combined with other weaknesses. It has a CVSS v3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2025-34135? +

CVE-2025-34135 has a CVSS v3.1 score of 4.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-34135? +

CVE-2025-34135 affects products from nagios, specifically: nagios_xi. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-34135? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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