CVE-2023-50475
📋 TL;DR
This vulnerability in bcoin version 2.2.0 allows remote attackers to extract sensitive information through weak hashing algorithms in the faye-websocket.js component. Attackers can potentially decrypt or manipulate data that should be protected. Anyone running the vulnerable bcoin version is affected.
💻 Affected Systems
- bcoin
📦 What is this software?
Bcoin by Bcoin
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of sensitive data including authentication tokens, private keys, or transaction data, potentially leading to financial loss or system takeover.
Likely Case
Information disclosure of sensitive data transmitted via websockets, potentially enabling further attacks.
If Mitigated
Minimal impact with proper network segmentation and monitoring, though cryptographic weaknesses remain.
🎯 Exploit Status
Exploitation requires network access to the vulnerable service but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.1 or later
Vendor Advisory: https://github.com/bcoin-org/bcoin/issues/1174
Restart Required: Yes
Instructions:
1. Update bcoin to version 2.2.1 or later. 2. Restart the bcoin service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable vulnerable websocket endpoints
allTemporarily disable or restrict access to websocket endpoints until patching is complete.
Configure firewall rules to block websocket ports (typically 8333 for mainnet)
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Monitor network traffic for unusual websocket activity and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check bcoin version: if running 2.2.0, the system is vulnerable.Check Version:
bcoin --versionVerify Fix Applied:
Verify bcoin version is 2.2.1 or later and check that websocket connections are using strong cryptographic algorithms.📡 Detection & Monitoring
Log Indicators:
- Unusual websocket connection patterns
- Failed cryptographic operations in logs
Network Indicators:
- Unusual traffic to websocket ports
- Patterns matching known weak hash algorithms
SIEM Query:
source="bcoin" AND (websocket OR hash) AND (error OR failed)