Liquid Network Resumes Block Production After $320M Exploit
The Liquid Network has restarted block production following a $320 million unauthorized Bitcoin withdrawal incident. However, transaction processing and peg operations remain suspended as recovery efforts to restore the BTC/L-BTC reserves and ensure network stabilization continue.
Resumption of Block Production and Precautionary Measures
On Thursday, Liquid announced via a post on X (formerly Twitter) that block production had resumed, but “without transactions” as a precautionary step. This allows the network to be monitored to confirm full stabilization. Updates have been deployed to functionary and bridge nodes, with functionary nodes now signing and validating blocks as intended.
Meanwhile, peg operations, including PAK-authorized peg-outs, remain suspended as the network works to restore its BTC/L-BTC reserves.
Software Update Addressing Vulnerability
A day earlier, Liquid issued an emergency update for Elements, the network’s underlying software. The update, Elements v23.3.4, fixed a proof-verification cache vulnerability that was linked to the exploit. The patch hardened cache keys used for range proofs, as part of the network’s recovery strategy.
Bitcoin Withdrawal Incident and Fund Recovery
On September 6, Liquid suspended operations after actors claiming to be white-hat hackers withdrew about 4,000 BTC (approximately $320 million) from the network’s federation wallet. This accounted for around 95% of the wallet’s balance of roughly 4,200 BTC.
The withdrawn funds were connected to L-BTC originating from a bug in Elements, the open-source software powering Liquid.
Subsequently, the actors returned 3,400 BTC, valued at about $270 million at the time, after Blockstream confirmed the affected bridge nodes had been patched.
As of September 7, about 598 BTC (approximately $46 million at current prices) remained unreturned.
Why it matters
The news about Liquid Network resuming block production after a major $320 million exploit is significant for the crypto community and network users. It affirms that the network operators are actively taking steps to stabilize and recover assets while promptly releasing security updates to fix vulnerabilities. Suspending transactions and peg operations is a preventive measure to avoid further loss and demonstrates a commitment to maintaining infrastructure integrity, critical for trust and stability in Bitcoin’s cross-chain operations.
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