CVE-2024-58273
📋 TL;DR
Nagios Log Server versions before 2024R1.0.2 contain a local privilege escalation vulnerability. An attacker who can execute commands as the Apache web user or backend shell user can escalate privileges to root on the host. This affects all Nagios Log Server installations running vulnerable versions.
💻 Affected Systems
- Nagios Log Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root access, allowing installation of persistent backdoors, data exfiltration, and lateral movement to other systems.
Likely Case
Attackers with initial access to the web server or backend shell can gain complete control of the Nagios Log Server host.
If Mitigated
With proper access controls and network segmentation, impact is limited to the Nagios Log Server host only.
🎯 Exploit Status
Exploitation requires initial access as Apache or backend shell user. Once this access is obtained, privilege escalation to root is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024R1.0.2
Vendor Advisory: https://www.nagios.com/changelog/#log-server-2024R1
Restart Required: Yes
Instructions:
1. Backup your Nagios Log Server configuration and data. 2. Download Nagios Log Server 2024R1.0.2 from the Nagios website. 3. Follow the official upgrade instructions provided by Nagios. 4. Restart the Nagios Log Server services after upgrade.
🔧 Temporary Workarounds
Restrict Apache User Privileges
linuxLimit the Apache user's ability to execute commands and access sensitive files.
chmod 750 /usr/local/nagioslogserver
setfacl -m u:www-data:r-x /usr/local/nagioslogserver
Implement Mandatory Access Control
linuxUse SELinux or AppArmor to restrict Apache and backend processes.
semanage fcontext -a -t httpd_sys_content_t '/usr/local/nagioslogserver(/.*)?'
restorecon -Rv /usr/local/nagioslogserver
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Nagios Log Server from critical systems
- Enforce least privilege access controls and monitor for suspicious activity from Apache/backend users
🔍 How to Verify
Check if Vulnerable:
Check Nagios Log Server version via web interface or command line. Versions below 2024R1.0.2 are vulnerable.Check Version:
cat /usr/local/nagioslogserver/var/version.txtVerify Fix Applied:
Confirm version is 2024R1.0.2 or higher and test that Apache user cannot escalate to root.📡 Detection & Monitoring
Log Indicators:
- Unusual commands executed by Apache user (www-data, apache)
- Privilege escalation attempts in system logs
- Sudo/su attempts from Apache or backend users
Network Indicators:
- Unexpected outbound connections from Nagios Log Server host
- SSH or other remote access from Nagios host to other systems
SIEM Query:
source="*nagios*" AND (user="www-data" OR user="apache" OR user="nagios") AND (event="sudo" OR event="su" OR event="privilege")