CVE-2024-52912
📋 TL;DR
This vulnerability in Bitcoin Core allows attackers to cause a network split by exploiting an integer overflow when calculating time offsets for new peers. It affects all Bitcoin Core nodes running vulnerable versions, potentially disrupting network consensus and transaction validation.
💻 Affected Systems
- Bitcoin Core
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete network partition where different segments of the Bitcoin network operate with different transaction histories, enabling double-spend attacks and undermining blockchain integrity.
Likely Case
Temporary network instability, increased orphaned blocks, and potential short-term consensus issues among affected nodes.
If Mitigated
Minor network latency or connection issues that self-correct as nodes reconnect with proper time synchronization.
🎯 Exploit Status
Exploitation requires network-level access to target nodes and understanding of Bitcoin peer-to-peer protocol.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Bitcoin Core 0.21.0 and later
Vendor Advisory: https://bitcoincore.org/en/2024/07/03/disclose-timestamp-overflow/
Restart Required: Yes
Instructions:
1. Download Bitcoin Core 0.21.0 or later from bitcoincore.org. 2. Stop the Bitcoin Core service. 3. Install the new version. 4. Restart Bitcoin Core.
🔧 Temporary Workarounds
Restrict Peer Connections
allLimit incoming peer connections to trusted nodes only
bitcoin-cli setban 0.0.0.0/0 add
bitcoin-cli addnode <trusted_node_ip> add
🧯 If You Can't Patch
- Implement strict network ACLs to limit peer connections to known trusted nodes only
- Monitor for unusual network partition events and node disconnections
🔍 How to Verify
Check if Vulnerable:
Check Bitcoin Core version: bitcoin-cli getnetworkinfo | grep versionCheck Version:
bitcoin-cli getnetworkinfo | grep versionVerify Fix Applied:
Confirm version is 0.21.0 or higher and monitor for stable peer connections📡 Detection & Monitoring
Log Indicators:
- Unusual time offset warnings in debug.log
- Multiple peer disconnections in short timeframes
- Network partition warnings
Network Indicators:
- Sudden drop in connected peers
- Increased orphaned blocks
- Inconsistent blockchain height across nodes
SIEM Query:
source="bitcoin.log" AND ("time offset" OR "peer disconnected" OR "network split")