Incident Overview
GAME experienced a reentrancy attack resulting in a loss of 49,596 USD.
On February 12, 2024, an attacker exploited a reentrancy vulnerability in a GAME's smart contract by repeatedly calling the makeBid() function. The stolen funds were transferred to another EOAs and then the part was deposited into FixedFloat, while the remainder was sent to an unknown address with over 2 million transactions. The attacker obtained 1.1 ETH from an address to which sent some of the stolen funds after the attack.
The attack began approximately 7 hours after the exploited contract was created.
Attacker Address:
https://etherscan.io/address/0x145766A5…675A0B
Address which funded the attacker:
https://etherscan.io/address/0x077D360f…e7C4A4
Malicious Transactions:
https://etherscan.io/tx/0xe07fa7cf…c2e32f
https://etherscan.io/tx/0x1624cd34…68f6c7
https://etherscan.io/tx/0x0eb8f8d1…1bd5c4
Malicious Contracts:
https://etherscan.io/address/0x8d4dE2Bc…74D12a
https://etherscan.io/address/0x327aa670…B66dCd
FixedFloat Deposit Transaction:
https://etherscan.io/tx/0xf19de65b…57464b
Incident Report
What the Attacker Needed to Succeed
Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.
What Auditors Should Check
If you're auditing a protocol with similar architecture to GAME, these are the critical security checks that could have prevented this incident (February 2024).
- Verify all logic paths related to Reentrancy are guarded by proper access controls and input validation - see the Reentrancy attack class for patterns
- Check that all state-changing functions follow the Checks-Effects-Interactions (CEI) pattern to prevent reentrancy and logic ordering bugs
- Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs
Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.
Free TrialRelated Attack Classes
The technique used in this hack maps to these vulnerability classes in our security curriculum:
Sources & References
Learn to Prevent the Next GAME
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