CVE-2023-25911
📋 TL;DR
CVE-2023-25911 is a critical OS command injection vulnerability in Danfoss AK-EM100 web applications that allows authenticated attackers to execute arbitrary operating system commands. This affects organizations using Danfoss AK-EM100 devices with web interfaces exposed. Attackers can gain full system control through the web application parameters.
💻 Affected Systems
- Danfoss AK-EM100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary commands with system privileges, potentially leading to data theft, system destruction, or lateral movement within the network.
Likely Case
Attackers gain shell access to the device, allowing them to install malware, exfiltrate data, or use the device as a pivot point for further attacks.
If Mitigated
With proper network segmentation and authentication controls, impact is limited to the specific device, though it remains vulnerable to authenticated attackers.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once authentication is obtained. The vulnerability is in web parameters, making it easy to craft malicious requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific version not provided in references - check vendor advisory
Vendor Advisory: https://divd.nl/cves/CVE-2023-25911
Restart Required: Yes
Instructions:
1. Check Danfoss security advisory for patch availability. 2. Download latest firmware from Danfoss support portal. 3. Apply firmware update following manufacturer instructions. 4. Restart device to apply changes. 5. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Danfoss AK-EM100 devices from critical networks and restrict access to authorized users only.
Access Control Hardening
allImplement strict authentication controls, use strong passwords, and limit user privileges to minimum necessary.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Monitor for suspicious command execution attempts and web application parameter manipulation
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against patched versions in Danfoss advisory. Test web application parameters for command injection vulnerabilities.Check Version:
Check web interface system information page or use manufacturer-specific CLI commands if availableVerify Fix Applied:
Verify firmware version matches patched version from vendor. Test previously vulnerable parameters to ensure command injection is no longer possible.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Web application parameter manipulation attempts
- Authentication logs showing access from unexpected sources
Network Indicators:
- Unusual outbound connections from Danfoss devices
- Suspicious HTTP requests to web application parameters
SIEM Query:
source="danfoss-ak-em100" AND (event="command_execution" OR param="*;*" OR param="*|*" OR param="*`*" OR param="*$(*")