CVE-2025-12381
📋 TL;DR
A local privilege escalation vulnerability in AlgoSec Firewall Analyzer allows authenticated users with command-line access to abuse sudoers file permissions and gain elevated privileges through parameter injection. This affects Linux 64-bit installations of Firewall Analyzer versions A33.0 and A33.10. Attackers can execute arbitrary commands with higher privileges than intended.
💻 Affected Systems
- AlgoSec Firewall Analyzer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains root privileges, enabling complete system compromise, data theft, installation of persistent backdoors, and lateral movement to other systems.
Likely Case
Authenticated user escalates to administrative privileges within Firewall Analyzer, potentially accessing sensitive firewall configuration data, modifying rules, or disrupting operations.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized privilege escalation attempts that are detected and blocked.
🎯 Exploit Status
Exploitation requires local access and knowledge of sudoers configuration. Parameter injection techniques are well-documented and relatively easy to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: A33.20 or later
Vendor Advisory: https://techdocs.algosec.com/en/cves/Content/tech-notes/cves/cve-2025-12381.htm
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download and install AlgoSec Firewall Analyzer version A33.20 or later from official vendor portal. 3. Apply the update following vendor documentation. 4. Restart the Firewall Analyzer service. 5. Verify successful update and functionality.
🔧 Temporary Workarounds
Restrict sudoers configuration
linuxModify sudoers file to remove or restrict commands that allow parameter injection
sudo visudo
# Review and modify sudoers entries to use specific commands without wildcards or parameter injection possibilities
Implement least privilege access
linuxRestrict command-line access to only necessary administrative users
sudo usermod -aG wheel [username] # Only for required users
sudo chmod 750 /path/to/algosec # Restrict directory access
🧯 If You Can't Patch
- Implement strict access controls to limit command-line access to trusted administrators only
- Monitor sudo usage and command execution for suspicious parameter injection attempts
🔍 How to Verify
Check if Vulnerable:
Check installed version: cat /opt/algosec/version.txt or equivalent installation path. If version is A33.0 or A33.10, system is vulnerable.Check Version:
cat /opt/algosec/version.txt || find / -name '*algosec*version*' -type f 2>/dev/null | head -1 | xargs catVerify Fix Applied:
Verify version is A33.20 or later: cat /opt/algosec/version.txt. Test sudo configuration by attempting parameter injection on known vulnerable commands.📡 Detection & Monitoring
Log Indicators:
- Unusual sudo command executions with parameter manipulation
- Multiple failed privilege escalation attempts
- Commands executed with unexpected parameters from non-admin users
Network Indicators:
- N/A - Local privilege escalation
SIEM Query:
source="sudo" AND (command="*algosec*" OR command="*firewall*analyzer*") AND (user!="admin" OR user!="root") AND (parameter="*;*" OR parameter="*|*" OR parameter="*`*")