Incident Overview
On April 24th, FENGSHOU (NGFS) was exploited. $191k was gained as an attacker's profit.
The FENGSHOU (NGFS) token contract has an access control vulnerability in the delegateCallReserves function, which allowed a malicious actor to change the UniSwapV2 proxy address. This created an opportunity for the exploit, resulting in the actor earning approximately $191,000 in USDT tokens.
Attacker:
https://bscscan.com/address/0xd03d360d…6754a0
Attacker contract:
https://bscscan.com/address/0xc7378110…d035e4
Exploit tx:
https://bscscan.com/tx/0x8ff764dd…54de25
Incident Report
Protocol Information
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 FENGSHOU Token, these are the critical security checks that could have prevented this incident (April 2024).
- Verify all logic paths related to Access Control are guarded by proper access controls and input validation - see the Access Control Attacks attack class for patterns
- 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 FENGSHOU Token
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