CVE-2024-28138
📋 TL;DR
This vulnerability allows unauthenticated attackers with network access to execute arbitrary system commands on affected devices via the web interface. Attackers can exploit improper input sanitization in the msg_events.php script to run commands as the www-data user. Organizations using ImageAccess products with exposed web interfaces are affected.
💻 Affected Systems
- ImageAccess products with web interface
⚠️ 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
Complete system compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Unauthorized command execution leading to data exfiltration, service disruption, and installation of cryptocurrency miners or botnet malware.
If Mitigated
Limited impact due to network segmentation, web interface isolation, or proper input validation controls preventing command injection.
🎯 Exploit Status
Exploitation requires only HTTP GET requests with crafted parameters; no authentication needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references
Vendor Advisory: https://www.imageaccess.de/?page=SupportPortal&lang=en
Restart Required: Yes
Instructions:
1. Contact ImageAccess support for patch details. 2. Apply vendor-provided security updates. 3. Restart affected services or devices. 4. Verify fix implementation.
🔧 Temporary Workarounds
Block web interface access
linuxRestrict network access to the device's web interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable msg_events.php script
linuxRemove or rename the vulnerable script to prevent exploitation
mv /path/to/msg_events.php /path/to/msg_events.php.disabled
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Deploy web application firewall (WAF) with command injection rules
🔍 How to Verify
Check if Vulnerable:
Test with HTTP GET request to msg_events.php with crafted data parameter; monitor for command execution responsesCheck Version:
Check device web interface or contact vendor for version informationVerify Fix Applied:
Attempt exploitation after patch; verify script no longer executes arbitrary commands📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP GET requests to msg_events.php
- Suspicious command execution in web server logs
- www-data user running unexpected processes
Network Indicators:
- HTTP requests with shell metacharacters in parameters
- Outbound connections from web server to suspicious IPs
SIEM Query:
source="web_logs" AND uri="*msg_events.php*" AND (param="*data=*&*" OR param="*;*" OR param="*|*" OR param="*`*" OR param="*$(*")