CVE-2022-28381
📋 TL;DR
CVE-2022-28381 is a critical stack-based buffer overflow vulnerability in ALLMediaServer 1.6's mediaserver.exe component. Attackers can send a specially crafted long string to TCP port 888 to execute arbitrary code remotely. This affects anyone running the vulnerable ALLMediaServer version.
💻 Affected Systems
- ALLMediaServer
📦 What is this software?
Allmediaserver by Allmediaserver
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution, allowing attackers to install malware, steal data, or create persistent backdoors.
Likely Case
Remote code execution leading to ransomware deployment, data exfiltration, or botnet recruitment.
If Mitigated
Denial of service if buffer overflow crashes the service without code execution.
🎯 Exploit Status
Public exploit code is available on GitHub and Packet Storm. The vulnerability is similar to CVE-2017-17932, suggesting attackers may adapt existing exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found
Restart Required: No
Instructions:
No official patch is available. Consider the workarounds and mitigation steps below.
🔧 Temporary Workarounds
Block TCP port 888
windowsUse firewall rules to block inbound connections to TCP port 888 on affected systems.
netsh advfirewall firewall add rule name="Block ALLMediaServer Port" dir=in action=block protocol=TCP localport=888
Disable ALLMediaServer service
windowsStop and disable the ALLMediaServer service to prevent exploitation.
sc stop ALLMediaServer
sc config ALLMediaServer start= disabled
🧯 If You Can't Patch
- Segment network to isolate ALLMediaServer systems from untrusted networks
- Implement strict network access controls to limit connections to port 888
🔍 How to Verify
Check if Vulnerable:
Check if ALLMediaServer version 1.6 is installed and mediaserver.exe is running on TCP port 888.Check Version:
Check program files directory for ALLMediaServer version or examine installed programs in Control Panel.Verify Fix Applied:
Verify that ALLMediaServer is no longer running or that port 888 is not listening.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from mediaserver.exe
- Crash logs from ALLMediaServer service
Network Indicators:
- Unusual traffic patterns to TCP port 888
- Large strings sent to port 888
SIEM Query:
source="*" AND (destination_port=888 AND (payload_size>1000 OR contains(payload, "AAAAAAAA")))