Ongoing EOSIO exploit allows attacker to gain 30,000 EOS as network freezes

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An ongoing exploit on EOSIO is allowing an attacker to win every roll on gambling dApp EOSPlay by paying to fill blocks with their transactions. So far, the attacker gained 30,000 EOS worth over $110,000 while making the network “unusable.”

A clever attacker was able to use REX, an EOS resource exchange for RAM and CPU, to ensure that blocks were filled with their transactions to continuously win on the gambling dApp EOSPlay. This resulted in the EOSIO network “freezing” as thousands of EOS were fed to the attacker’s wallet, as confirmed by another source.

For 300 EOS, worth a little over $1,000, the attacker was able to make away with 30,000 EOS tokens, said Jared Moore to CryptoSlate, an active community member. A look at the on-chain transactions involved confirms the attack.

One anonymous smart contract developer, the creator of the ERC-233 token, stated the attack may have impacted more than just EOSPlay. The attacker appears to be leveraging multiple accounts to exploit several different smart contracts.

So, $EOS is still in congestion mode. My 20 staked EOS CPU gave me 6 ms instead of 2800ms as it should be in a normal stage. pic.twitter.com/L6D5kYIBsY

— Dexaran (@Dexaran) September 13, 2019

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