CVE-2021-47881
📋 TL;DR
This vulnerability in dataSIMS Avionics ARINC 664-1 version 4.5.3 allows attackers to execute arbitrary code on Windows systems by exploiting a local buffer overflow via a malicious milstd1553result.txt file. It affects users of this specific avionics software version running on Windows. Attackers can potentially gain full system control through crafted payloads.
💻 Affected Systems
- dataSIMS Avionics ARINC 664-1
⚠️ 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 with arbitrary code execution leading to data theft, system destruction, or lateral movement within the network.
Likely Case
Local privilege escalation or system compromise on affected Windows machines running the vulnerable software.
If Mitigated
Limited impact if proper file permissions restrict access to the milstd1553result.txt file and the software runs with minimal privileges.
🎯 Exploit Status
Exploit requires local access to manipulate the milstd1553result.txt file. Public exploit code exists on Exploit-DB (ID 49577).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.ddc-web.com/
Restart Required: No
Instructions:
Check vendor website for security updates. If no patch is available, implement workarounds and monitor for vendor updates.
🔧 Temporary Workarounds
Restrict File Permissions
windowsSet strict permissions on milstd1553result.txt file to prevent unauthorized modifications
icacls "C:\path\to\milstd1553result.txt" /deny Everyone:(W)
Run with Minimal Privileges
windowsConfigure the dataSIMS software to run with limited user privileges instead of administrator/system
🧯 If You Can't Patch
- Isolate affected systems from critical network segments
- Implement strict access controls and monitoring for file modifications to milstd1553result.txt
🔍 How to Verify
Check if Vulnerable:
Check if dataSIMS Avionics ARINC 664-1 version 4.5.3 is installed on Windows systemsCheck Version:
Check software properties or installation directory for version informationVerify Fix Applied:
Verify software has been updated to a version later than 4.5.3 or workarounds have been implemented📡 Detection & Monitoring
Log Indicators:
- Unusual file modifications to milstd1553result.txt
- Process crashes or unexpected behavior in dataSIMS software
Network Indicators:
- Unusual outbound connections from affected systems post-exploitation
SIEM Query:
EventID=4663 AND ObjectName="*milstd1553result.txt" AND AccessMask=0x2