CVE-2025-59518
📋 TL;DR
This CVE describes an OS command injection vulnerability in LemonLDAP::NG's Safe jail feature. Administrators with rule editing privileges can execute arbitrary commands on the server due to improper localization of the underscore variable during rule evaluation. This affects systems running vulnerable versions of LemonLDAP::NG with administrators who can edit rules.
💻 Affected Systems
- LemonLDAP::NG
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise allowing attacker to execute arbitrary commands with the privileges of the LemonLDAP::NG process, potentially leading to data theft, system takeover, or lateral movement.
Likely Case
Privileged administrator account compromise leading to unauthorized command execution, configuration changes, or data access within the LemonLDAP::NG environment.
If Mitigated
Limited impact due to restricted administrator access, proper network segmentation, and monitoring preventing successful exploitation.
🎯 Exploit Status
Exploitation requires administrative access to edit rules, making it an insider threat or post-compromise attack vector.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.16.7 or 2.21.3
Vendor Advisory: https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues/3462
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Update LemonLDAP::NG to version 2.16.7 (for 2.16.x branch) or 2.21.3 (for 2.17-2.21 branch). 3. Restart the LemonLDAP::NG service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict Administrator Access
allLimit rule editing privileges to only essential administrators and implement strict access controls.
Disable Safe Jail Rule Editing
allTemporarily disable or restrict access to rule editing functionality in the Safe jail if not required.
🧯 If You Can't Patch
- Implement strict least-privilege access controls for LemonLDAP::NG administrators
- Monitor and audit all rule changes and administrator activities in LemonLDAP::NG
🔍 How to Verify
Check if Vulnerable:
Check LemonLDAP::NG version using the web interface or configuration files. Versions before 2.16.7 or between 2.17-2.21.2 are vulnerable.Check Version:
Check the LemonLDAP::NG web interface or configuration files for version information. On Linux: grep 'version' /etc/lemonldap-ng/*.conf or check the web admin interface.Verify Fix Applied:
Verify the installed version is 2.16.7 or higher, or 2.21.3 or higher for the 2.17-2.21 branch.📡 Detection & Monitoring
Log Indicators:
- Unusual rule modifications in LemonLDAP::NG logs
- Unexpected command execution patterns in system logs
- Administrator account activity outside normal patterns
Network Indicators:
- Unusual outbound connections from LemonLDAP::NG server
- Unexpected network traffic patterns following rule changes
SIEM Query:
Search for: 'lemonldap rule modification' OR 'safe jail' AND 'command execution' in system and application logs