Zcash Foundation ships Zebra 4.5.1 after 4.5.0 leaves critical consensus-split bug alive
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Promote with Leviathan NewsZcash Foundation released Zebra 4.5.1 with a critical fix for a P2SH sigop-counting bug left unresolved by 4.5.0, warning all Zebra node operators to upgrade because there is no workaround. The bug could make Zebra reject blocks that zcashd accepts, risking a chain split if enough low-threshold multisig P2SH spends pushed Zebra's count over the 20,000 sigops limit. The GitHub advisory says an attacker would not need mining power; broadcasting valid transactions and letting any miner include them would be enough.
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More coverage
- Zebra 4.5.3 and 5.0.0: Emergency Soft Fork and NU6.2 Activation (zfnd.org)
- Zebra 4.5.0 Release - Zcash Foundation (forum.zcashcommunity.com)
- Zebra 4.5.1: Security Fixes - Zcash Community Forum (forum.zcashcommunity.com)
- Zcash slides to $572 as emergency patch exposes consensus ... (cryptonews.net)
- Zcash Foundation Releases Zebra 4.5.1, Fixes Critical Consensus ... (binance.com)
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