Logic error in custom approval
Days in Operation:
100 pts each
The Redacted protocol is the dApp centered around BTRFLY, which allows users to stake, earn incentives, and interact with governance proposals.
Whitehat Tommaso Pifferi submitted a vulnerability in Redacted Cartel via Immunefi. The vulnerability was rated as critical because it would have allowed a malicious attacker to assign a user’s allowance to themselves, enabling the attacker to steal that user’s funds. Funds at risk were just under $6 million dollars. Redacted patched the bug and paid the whitehat $560,000 for his find.
The vulnerability here consisted of a faulty implementation of standard ERC-20 functions in REDACTED’s wxBTRFLY token, which is a wrapped version of the xBTRFLY. It was also inside the transferFrom function, but the issue was different. It allowed an attacker to take somebody else’s allowance and assign it to the attacker so she could steal funds from the user.
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