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Detail Analysis

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Date:

Status:

Count:

Contributor:

December 19, 2018

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Unverified

1

zerofriction.io

Loss Amount:

22,404

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Recovered Amount:

-

Currency:

EOS

KYC By:

Audit By:

None

None

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Website:

No data

Twitter:

No data

Discord:

No data

Telegram:

No data

Medium:

No data

Github:

No data

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Key Indicators

Platform:

Type:

Category:

Method:

Contract Vulnerabilities

Extended Method:

Rollback attack

Data Sources:

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The attacker rolls back the transaction when placing a bet. From the time the bet is placed until the transaction is rolled back, the betting data will temporarily exist in the database of the current node; and Tobet queries the betting by polling the node database outside the contract. The lottery will be drawn outside the contract and the result will be passed to the lottery action; when the attacker keeps betting and rolls back the transaction, because the betting and Tobet polling use the same node, the Tobet lottery polling can query the database betting information for a short time and draw the lottery. . However, the attacker's bet was not successful, and the contract would continue to draw prizes for him, resulting in no capital arbitrage.

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DISCLAIMER: While Zero Friction LLC has used the best efforts in aggregating and maintaining this database, Zero Friction LLC makes no representations or warranties with respect to the accuracy or completeness, and specifically disclaim any implied warranties of merchantability or fitness for any particular purpose. 

Under no circumstances, shall Zero Friction LLC be liable for any loss of profit or funds, any regulatory or governmental penalties, any legal costs, or any other commercial and non-commercial damages, including but not limited to special, incidental, consequential, or other damages from any or all usage of the dataset or information derived from our database.