Silo is a non-custodial lending protocol that implements risk-isolated money markets where any crypto asset can be borrowed with another.
For more information about Silo Finance, please visit https://www.silo.finance/.
Rewards by Threat Level
Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System V2.2. This is a simplified 5-level scale, with separate scales for websites/apps, smart contracts, and blockchains/DLTs, focusing on the impact of the vulnerability reported.
All web/app bug reports and all Critical/High severity smart contract bug reports must come with a PoC with an end-effect impacting an asset-in-scope in order to be considered for a reward. Explanations and statements are not accepted as PoC and code is required.
Rewards for critical smart contract vulnerabilities are further capped at 10% of economic damage, with the main consideration being the funds affected in addition to PR and brand considerations, at the discretion of the team. However, there is a minimum reward of USD 30 000 and a maximum of USD 100 000 for Critical smart contract bug reports.
Critical website and application bug reports will be rewarded with USD 20 000 only if the impact leads to a direct loss in funds or a manipulation of the votes or the voting result, as well as the modification of its display leading to a misrepresentation of the result or vote. All other impacts that would be classified as Critical would be rewarded no more than USD 10 000.
The following impacts/vulnerabilities are considered out of scope:
- Attacks caused by rebase tokens, fee-on-transfer tokens or non-standard ERC20 tokens are out of scope unless such token has deployed and configured Silo with user funds or has a pending DAO proposal for its Silo.
- On-chain oracle manipulation attacks (BalV2 TWAP, UniV3 TWAP and future integrations).
- Interest rate manipulation caused by lack of liquidity.
- Liquidation front-running.
In addition, known issues highlighted in the below audits reports are considered out of scope:
Payouts are handled by the Silo Finance team directly and are denominated in USD. However, payouts are done in USDC.
- Up to USD $100,000
- USD $20,000
- USD $5,000
Websites and Applications
- Up to USD $20,000
- USD $5,000
- USD $1,000
Assets in scope
- Smart Contract - BalancerV2PriceProviderType
- Smart Contract - InterestRateModelType
- Smart Contract - PRBMathCommonType
- Smart Contract - PRBMathSD59x18Type
- Smart Contract - PriceProvidersRepositoryType
- Smart Contract - SiloFactoryType
- Smart Contract - SiloGovernanceTokenType
- Smart Contract - SiloGovernorType
- Smart Contract - SiloLensType
- Smart Contract - SiloRepositoryType
- Smart Contract - SiloRouterType
- Smart Contract - TimelockControllerType
- Smart Contract - TokensFactoryType
- Smart Contract - UniswapV3PriceProviderType
- Smart Contract - UniswapV3SwapType
- Websites and Applications - Web/AppType
All smart contracts of Silo Finance can be found at https://github.com/silo-finance/silo-core-v1. However, only those in the Assets in Scope table are considered as in-scope of the bug bounty program.
Impacts in scope
Only the following impacts are accepted within this bug bounty program. All other impacts are not considered as in-scope, even if they affect something in the assets in scope table.
- Any governance voting result manipulationCriticalImpact
- Direct theft of any user funds, whether at-rest or in-motion, other than unclaimed yieldCriticalImpact
- Permanent freezing of fundsCriticalImpact
- Miner-extractable value (MEV)CriticalImpact
- Protocol insolvencyCriticalImpact
- Theft of unclaimed yieldHighImpact
- Permanent freezing of unclaimed yieldHighImpact
- Temporary freezing of fundsHighImpact
- Smart contract unable to operate due to lack of token fundsMediumImpact
- Block stuffing for profitMediumImpact
- Griefing (e.g. no profit motive for an attacker, but damage to the users or the protocol)MediumImpact
- Theft of gasMediumImpact
- Unbounded gas consumptionMediumImpact
Websites and Applications
- Execute arbitrary system commandsCriticalImpact
- Retrieve sensitive data/files from a running server such as /etc/shadow, database passwords, and blockchain keys(this does not include non-sensitive environment variables, open source code, or usernames)CriticalImpact
- Taking down the application/websiteCriticalImpact
- Taking state-modifying authenticated actions (with or without blockchain state interaction) on behalf of other users without any interaction by that user, such as, changing registration information, commenting, voting, making trades, withdrawals, etc.CriticalImpact
- Subdomain takeover with already-connected wallet interactionCriticalImpact
- Direct theft of user fundsCriticalImpact
- Malicious interactions with an already-connected wallet such as modifying transaction arguments or parameters, substituting contract addresses, submitting malicious transactionsCriticalImpact
- Changing sensitive details of other users (including modifying browser local storage) without already-connected wallet interaction and with up to one click of user interaction, such as email or password of the victim, etc.HighImpact
- Improperly disclosing confidential user information such as email address, phone number, physical address, etc.HighImpact
- Subdomain takeover without already-connected wallet interactionHighImpact
- Changing non-sensitive details of other users (including modifying browser local storage) without already-connected wallet interaction and with up to one click of user interaction, such as changing the first/last name of user, or en/disabling notificationMediumImpact
- Redirecting users to malicious websites (Open Redirect)MediumImpact
Out of Scope & Rules
The following vulnerabilities are excluded from the rewards for this bug bounty program:
- Attacks that the reporter has already exploited themselves, leading to damage
- Attacks requiring access to leaked keys/credentials
- Attacks requiring access to privileged addresses (governance, strategist)
Smart Contracts and Blockchain
- Incorrect data supplied by third party oracles
- Not to exclude oracle manipulation/flash loan attacks
- Basic economic governance attacks (e.g. 51% attack)
- Lack of liquidity
- Best practice critiques
- Sybil attacks
- Centralization risks
Websites and Apps
- Theoretical vulnerabilities without any proof or demonstration
- Attacks requiring physical access to the victim device
- Attacks requiring access to the local network of the victim
- Reflected plain text injection ex: url parameters, path, etc.
- This does not exclude persistent plain text injection
- Captcha bypass using OCR without impact demonstration
- CSRF with no state modifying security impact (ex: logout CSRF)
- Missing HTTP Security Headers (such as X-FRAME-OPTIONS) or cookie security flags (such as “httponly”) without demonstration of impact
- Server-side non-confidential information disclosure such as IPs, server names, and most stack traces
- Vulnerabilities used only to enumerate or confirm the existence of users or tenants
- Vulnerabilities requiring un-prompted, in-app user actions that are not part of the normal app workflows
- Lack of SSL/TLS best practices
- DDoS vulnerabilities
- Feature requests
- Issues related to the frontend without concrete impact and PoC
- Best practices issues without concrete impact and PoC
- Vulnerabilities primarily caused by browser/plugin defects
- Leakage of non sensitive api keys ex: etherscan, Infura, Alchemy, etc.
- Any vulnerability exploit requiring browser bugs for exploitation. ex: CSP bypass
The following activities are prohibited by this bug bounty program:
- Any testing with mainnet or public testnet contracts; all testing should be done on private testnets
- Any testing with pricing oracles or third party smart contracts
- Attempting phishing or other social engineering attacks against our employees and/or customers
- Any testing with third party systems and applications (e.g. browser extensions) as well as websites (e.g. SSO providers, advertising networks)
- Any denial of service attacks
- Automated testing of services that generates significant amounts of traffic
- Public disclosure of an unpatched vulnerability in an embargoed bounty