CVE-2026-52817
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
Linuxfabrik Monitoring Plugins before version 5.1.0 contains a vulnerability in the sudo policy that allows the nagios or icinga account to execute /usr/bin/apt-get as root without argument restrictions. An attacker controlling that account can use the APT::Update::Pre-Invoke option to execute arbitrary commands with root privileges, leading to full host compromise.
Risk Assessment
The risk includes complete system takeover by an attacker who already controls the monitoring account, potentially compromising all data and services on the host.
Recommendation
Upgrade Linuxfabrik Monitoring Plugins to version 5.1.0 or later, which includes the fix restricting apt-get arguments.
Original NVD description (English source)
Linuxfabrik Monitoring Plugins provides monitoring plugins for Icinga, Nagios, and related systems. Prior to version 5.1.0, the shipped assets/sudoers/Debian.sudoers policy allowed the nagios or icinga account to execute /usr/bin/apt-get as root without restricting its arguments. An attacker who already controls that monitoring account can supply the APT::Update::Pre-Invoke option to execute an arbitrary command while apt-get runs with root privileges, resulting in a root shell and complete compromise of the host. The vulnerable rule supports the check-plugins/deb-updates/deb-updates plugin, but it authorized arbitrary apt-get argument sequences rather than only the required apt-get update --quiet 2 command. This issue is fixed in version 5.1.0.