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Flux Finance

Flux Finance is a decentralized lending protocol built by the Ondo Finance team.

Maximum Bounty
Live Since
08 February 2023
Last Updated
21 March 2023
  • PoC required

Submit a Bug

Rewards by Threat Level

Smart Contract
USD $25,000 to USD $550,000
USD $25,000
USD $10,000
USD $1,000

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 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. Bug reports are required to include a runnable PoC in order to prove impact. Exceptions may be made in cases where the vulnerability is objectively evident from simply mentioning the vulnerability and where it exists. However, the bug reporter may be required to provide a PoC at any point in time.

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 25 000 for Critical smart contract bug reports.

The following known issues are also considered out of scope of this program:

  • Effects from blacklists (e.g. KYC revoked, USDC blacklist), if the effect only impacts the specific user.
  • Effects from using hypothetical use of tokens that do not follow the ERC-20 standard or include unusual behavior (e.g. transfer tax). If a token has certain functionality but that functionality is currently disabled, the effect will also be considered out of scope.
  • Misuse of admin rights (e.g. malicious admin multi-sig)
  • The protocol is forked from CompoundV2. The fToken contracts are forked from this commit. All other contracts (Comptroller, CErc20Delegator, InterestRateModel, etc.) are forked from this commit. Bug reports covering previously-discovered bugs are not eligible for the program. If a bug report covers a known issue, it may be rejected together with proof of the issue being known before escalation of the bug report. Previous audits of CompoundV2 can be found at: https://docs.compound.finance/v2/security/#audits
  • Any known issues in CompoundV2 up to these commits are considered out of scope. This includes, but is not limited to:
    • First deposit bug when a market is initialized - example video
    • Discrepancy in borrow rate per block on-chain vs. displayed APY in the UI

Payouts are handled by the Flux Finance team directly and are denominated in USD. However, payouts are done in USDC. The payment will be made by Flux Finance (the entity).

Program Overview

Flux Finance is a decentralized lending protocol built by the Ondo Finance team.

The protocol is a fork of Compound V2 with additional functionality to support both permissionless (e.g. USDC) and permissioned (e.g. OUSG) tokens. Permissions are enforced on a per-asset basis. For example, a USDC lender won't have any restrictions, but a USDC borrower using OUSG as collateral will need to satisfy OUSG's permissions.

Similar to Compound, Flux enables overcollateralized lending and borrowing in a peer-to-pool (p2pool) model.

For more information about Flux Finance, please visit https://fluxfinance.com/

KYC not required

No KYC information is required for payout processing.

Prohibited Activities

Default prohibited activities
  • Any testing on mainnet or public testnet deployed code; all testing should be done on local-forks of either public testnet or mainnet
  • 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 that are executed against project assets
  • Automated testing of services that generates significant amounts of traffic
  • Public disclosure of an unpatched vulnerability in an embargoed bounty
  • Any other actions prohibited by the Immunefi Rules

Feasibility Limitations

The project may be receiving reports that are valid (the bug and attack vector are real) and cite assets and impacts that are in scope, but there may be obstacles or barriers to executing the attack in the real world. In other words, there is a question about how feasible the attack really is. Conversely, there may also be mitigation measures that projects can take to prevent the impact of the bug, which are not feasible or would require unconventional action and hence, should not be used as reasons for downgrading a bug's severity. Therefore, Immunefi has developed a set of feasibility limitation standards which by default states what security researchers, as well as projects, can or cannot cite when reviewing a bug report.