High ยท published October 31, 2025
โก A script owned by the wrong user could let attackers escalate privileges in Nagios XI! ๐ฆธ Think of it like a restaurant where the head chef's recipe book is left open for the waitstaff to rewrite. If someone sneaks in with a pen, they could change the dish to something completely unexpected, and the next diners might get an awful surprise! An attacker with web server access could modify the process_perfdata.pl script, leading to arbitrary code execution as the nagios user when the script runs next. This could compromise the entire Nagios XI instance, allowing the attacker to control the monitoring environment and potentially disrupt critical operations. Yikes!
Think of it like a restaurant where the head chef's recipe book is left open for the waitstaff to rewrite. If someone sneaks in with a pen, they could change the dish to something completely unexpected, and the next diners might get an awful surprise! The vulnerability stems from improper file ownership and permissions on the process_perfdata.pl script, which is executed periodically as the nagios user but is owned by the www-data user, allowing modifications that lead to privilege escalation.
An attacker with web server access could modify the process_perfdata.pl script, leading to arbitrary code execution as the nagios user when the script runs next. This could compromise the entire Nagios XI instance, allowing the attacker to control the monitoring environment and potentially disrupt critical operations. Yikes! Upgrade Nagios XI to version 2024R2 or later immediately. Additionally, review file ownership and permissions for sensitive scripts, ensuring they are not writable by unintended users. Regular audits can help catch similar misconfigurations in the future! You've got this! Take these steps to lock it down, and your Nagios setup will be safer in no time! ๐ก๏ธ
| Product | Versions | Fixed in |
|---|---|---|
| nagios/nagios_xi | < 2024 | 2024 |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |
| nagios/nagios_xi | all versions | โ |