According to SlowMist monitoring, the decentralized exchange Atomic protocol was exploited due to a signature replay vulnerability, resulting in a loss of approximately 29,984 USDC. The vulnerability stemmed from contract 0xa806010f lacking bindings for position ID, position manager, caller, nonce, deadline, and chain ID in the signature digest, allowing the same manager’s signature to be replayed across 21 different position IDs. Under a flash loan price manipulation attack, this enabled unauthorized full LP destruction without TWAP or slippage checks.
Atomic Protocol Hit by Signature Replay Vulnerability, Loses 29,984 USDC
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Summary
The Atomic Protocol suffered a replay attack, resulting in the loss of 29,984 USDC due to a contract security vulnerability. The flaw in contract 0xa806010f arose from missing binding parameters such as position ID, position manager, and chain ID, allowing the same manager signature to be reused across 21 position IDs. Attackers exploited this to burn LP tokens using flash loans, circumventing TWAP and slippage checks.
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