🤖AI Summary
A transaction spam attack targeted the network using EXTCODESIZE opcode calls, causing blocks to take 20-60 seconds to validate due to excessive disk fetches. This resulted in a 2-3x reduction in network performance as validators struggled to process the malicious transactions.
Key Takeaways
- →The attack exploited the EXTCODESIZE opcode to force up to 50,000 disk fetches per transaction.
- →Block validation times increased dramatically to 20-60 seconds during the attack.
- →Network performance was reduced by 2-3x due to the computational overhead.
- →The attack demonstrates vulnerabilities in blockchain infrastructure to resource exhaustion attacks.
- →Network operators are implementing measures to prevent similar future attacks.
#spam-attack#blockchain-security#network-performance#extcodesize#vulnerability#dos-attack#validation-delays
Read Original →via Ethereum Foundation Blog
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