CVE-2024-53303
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary code on LRQA Nettitude PoshC2 servers by exploiting a flaw in the upload_file function. Attackers can achieve remote code execution via crafted POST requests. Only systems running PoshC2 after commit 123db87 are affected.
💻 Affected Systems
- LRQA Nettitude PoshC2
⚠️ 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 allowing attackers to execute arbitrary commands, steal data, pivot to other systems, and establish persistent access.
Likely Case
Attackers with valid credentials can execute code on the PoshC2 server, potentially compromising the entire command and control infrastructure.
If Mitigated
With proper authentication controls and network segmentation, impact is limited to the PoshC2 server itself.
🎯 Exploit Status
Exploitation requires valid authentication credentials; proof-of-concept code is publicly available in the GitHub gist reference.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to latest version if fix has been implemented, or apply workarounds.
🔧 Temporary Workarounds
Disable file upload functionality
allTemporarily disable or restrict the upload_file function in PoshC2 configuration
# Edit PoshC2 configuration to disable upload_file endpoint
Implement strict authentication controls
allEnforce strong authentication policies and limit user access to PoshC2 interface
# Configure strong authentication mechanisms and access controls
🧯 If You Can't Patch
- Isolate PoshC2 server from critical networks using firewall rules
- Implement network segmentation and monitor for suspicious POST requests to upload endpoints
🔍 How to Verify
Check if Vulnerable:
Check PoshC2 commit history to see if system is running code after commit 123db87Check Version:
git log --oneline | head -20Verify Fix Applied:
Verify that upload_file function has been patched or disabled in current configuration📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to upload_file endpoint
- Multiple failed authentication attempts followed by successful upload
Network Indicators:
- Suspicious POST requests with crafted payloads to PoshC2 upload endpoints
SIEM Query:
source="poshc2.log" AND (POST AND upload_file) AND (status=200 OR status=201)