Ankr Cross-Chain Bridge Attack Involves 3 Assets Worth Approximately $303,600

TechFlow news, Nov. 9: According to The Defiant, Ankr's Ethereum cross-chain bridge was attacked, and the attacker withdrew 5 types of tokens through 5 withdrawals. 3 of the assets are estimated to be worth approximately $303,600 based on prices displayed on Etherscan, while the other 2 tokens were not included due to the absence of price quotes.

The report said that all 5 withdrawals referenced a small deposit on Optimism on Nov. 3, which had previously been withdrawn on Ethereum. The new withdrawal calls used modified receipt data, pointing to different recipient addresses and larger amounts. On-chain records show that the withdrawals passed the bridge contract's authorization checks, but it is unclear how the attacker obtained the accepted authorization.

Source: TechFlow