Yearn Finance
Yearn Finance is a suite of products in Decentralized Finance (DeFi) that provides lending aggregation and yield generation on the Ethereum blockchain. The protocol is maintained by various independent developers and is governed by YFI holders. Their products include:
PoC required
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Assets in Scope
Impacts in Scope
Any governance voting result manipulation
Direct theft of any user funds, whether at-rest or in-motion, other than unclaimed yield
Permanent freezing of funds
Miner-extractable value (MEV)
Protocol insolvency
Indefinite losses due to Miner-extractable value (MEV) on user actions without any external factors.
Theft of unclaimed yield
Permanent freezing of unclaimed yield
Temporary freezing of funds for at least 7 days
Definite losses due to Miner-extractable value (MEV) on user actions without any external factors
Griefing (e.g. no profit motive for an attacker, but damage to the users or the protocol)
Theft of gas
Out of scope
- Best practice critiques
- Any report on contracts not actively/directly supported by Yearn Finance. E.g.: Ironbank.
- Any report for the following helper contracts are not valid for bounties or in scope:
- https://etherscan.io/address/0x5b4F3BE554a88Bd0f8d8769B9260be865ba03B4a
- https://etherscan.io/address/0x437758D475F70249e03EDa6bE23684aD1FC375F0
- https://etherscan.io/address/0xa0B57619A980DFEfD50f24F310EE1b55A40A9D46
- https://ftmscan.com/address/0x97D0bE2a72fc4Db90eD9Dbc2Ea7F03B4968f6938
- https://ftmscan.com/address/0x8ca27a3ab8917a033f278D20135d2467faA099bA
- https://ftmscan.com/address/0x5ABdfDfa0cF2d83c4755E0a2a782eF57FEd5c23B
- https://arbiscan.io/address/0x3a8efa2d87d60c0289f19b44a0928f4269c0f094
- https://arbiscan.io/address/0x66a1a27f4b22dcaa24e427dcffbf0cddd9d35e0f
- https://optimistic.etherscan.io/address/0xD63aB09ac2048a7eCac92f0fFad5F104edD0E032
- https://optimistic.etherscan.io/address/0xD3A93C794ee2798D8f7906493Cd3c2A835aa0074
Smart Contract specific
- Incorrect data supplied by third party oracles
- Not to exclude oracle manipulation/flash loan attacks
- Impacts requiring basic economic and governance attacks (e.g. 51% attack)
- Lack of liquidity impacts
- Impacts from Sybil attacks
- Impacts involving centralization risks
All categories
- Impacts requiring attacks that the reporter has already exploited themselves, leading to damage
- Impacts caused by attacks requiring access to leaked keys/credentials
- Impacts caused by attacks requiring access to privileged addresses (including, but not limited to: governance and strategist contracts) without additional modifications to the privileges attributed
- Impacts relying on attacks involving the depegging of an external stablecoin where the attacker does not directly cause the depegging due to a bug in code
- Mentions of secrets, access tokens, API keys, private keys, etc. in Github will be considered out of scope without proof that they are in-use in production
- Best practice recommendations
- Feature requests
- Impacts on test files and configuration files unless stated otherwise in the bug bounty program
- Impacts requiring phishing or other social engineering attacks against project's employees and/or customers
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