CVE-2024-45256
📋 TL;DR
CVE-2024-45256 is an unauthenticated arbitrary file write vulnerability in BYOB 2.0 that allows attackers to overwrite SQLite database files, leading to authentication bypass and potential remote code execution. This affects anyone running BYOB 2.0 with the vulnerable exfiltration endpoint exposed. Attackers can exploit this without credentials via crafted HTTP requests.
💻 Affected Systems
- BYOB (Build Your Own Botnet)
⚠️ 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 via remote code execution leading to botnet takeover, data exfiltration, and lateral movement within the network.
Likely Case
Authentication bypass allowing unauthorized access to the BYOB control panel, database manipulation, and potential privilege escalation.
If Mitigated
Limited impact if endpoint is not internet-facing and proper network segmentation is in place.
🎯 Exploit Status
Public exploit code available with detailed write-up demonstrating RCE chain.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Consider migrating to alternative solutions or implementing strict workarounds.
🔧 Temporary Workarounds
Disable Exfiltration Endpoint
allRemove or disable the vulnerable file_add endpoint in api/files/routes.py
# Remove or comment out the vulnerable route in api/files/routes.py
# Restart BYOB service after modification
Network Access Control
linuxRestrict access to BYOB endpoints using firewall rules
# Example iptables rule: iptables -A INPUT -p tcp --dport [BYOB_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [BYOB_PORT] -j DROP
🧯 If You Can't Patch
- Isolate BYOB instance in separate network segment with strict egress filtering
- Implement web application firewall (WAF) rules to block malicious file upload patterns
🔍 How to Verify
Check if Vulnerable:
Check if BYOB 2.0 is running and accessible. Test with exploit PoC from references if in controlled environment.Check Version:
# Check BYOB version in configuration or about pageVerify Fix Applied:
Verify the file_add endpoint is no longer accessible or properly validates file paths.📡 Detection & Monitoring
Log Indicators:
- Unusual file write operations to SQLite database paths
- Unauthenticated requests to /api/files/add endpoint
- HTTP requests with crafted filename parameters
Network Indicators:
- Unusual outbound connections from BYOB server
- Traffic to known malicious IPs from BYOB instance
SIEM Query:
source="byob.log" AND (uri_path="/api/files/add" OR message="file_add") AND user="-"