CVE-2016-11017
📋 TL;DR
CVE-2016-11017 is a critical remote code execution vulnerability in AKIPS Network Monitor that allows unauthenticated attackers to execute arbitrary operating system commands by injecting shell metacharacters into the username parameter during login attempts. Organizations running AKIPS Network Monitor versions 15.37 through 16.5 are affected. The vulnerability returns command output in limited login failure messages, making exploitation straightforward.
💻 Affected Systems
- AKIPS Network Monitor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands with system privileges, install malware, exfiltrate sensitive network monitoring data, pivot to other systems, and establish persistent backdoors.
Likely Case
Attackers gain initial foothold on the network monitoring system, execute reconnaissance commands, steal credentials and configuration data, and potentially use the system as a pivot point for lateral movement.
If Mitigated
With proper network segmentation and access controls, impact is limited to the AKIPS system itself, though sensitive monitoring data could still be compromised.
🎯 Exploit Status
Multiple public exploit scripts are available, including on Exploit-DB. The vulnerability requires no authentication and exploitation is trivial with publicly available tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 16.6
Vendor Advisory: https://www.akips.com/
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download AKIPS Network Monitor version 16.6 or later from the vendor portal. 3. Follow the vendor's upgrade procedure for your specific deployment. 4. Restart the AKIPS service. 5. Verify the fix by testing command injection attempts.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to the AKIPS web interface using firewall rules to only allow connections from trusted administrative IP addresses.
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Application Firewall (WAF)
allDeploy a WAF in front of AKIPS to block command injection attempts by filtering shell metacharacters in login parameters.
🧯 If You Can't Patch
- Immediately restrict network access to the AKIPS interface using firewall rules to only allow connections from absolutely necessary administrative IPs.
- Implement a reverse proxy with input validation to filter shell metacharacters before they reach the AKIPS application.
🔍 How to Verify
Check if Vulnerable:
Attempt to inject a simple command like ';id;' or '|id|' in the username field during login and check if command output appears in the error message.Check Version:
Check the AKIPS web interface footer or admin panel for version information, or run: cat /usr/local/akips/VERSION (path may vary)Verify Fix Applied:
After upgrading to 16.6+, attempt the same command injection. The application should reject the input or show generic error messages without command output.📡 Detection & Monitoring
Log Indicators:
- Unusual login attempts with special characters in username field
- Multiple failed login attempts from single IP with varying usernames containing shell metacharacters
- System command execution in web server logs
Network Indicators:
- HTTP POST requests to login endpoint containing shell metacharacters like ;, |, &, $, (, ) in parameters
- Unusual outbound connections from AKIPS server to external IPs
SIEM Query:
source="akips_access.log" AND (uri_path="/login" OR uri_path="/cgi-bin/login") AND (username="*;*" OR username="*|*" OR username="*&*" OR username="*$(*" OR username="*`*")