21 April 2022
Live since
No
KYC required
$1,000,000
Maximum bounty

Program Overview

Bend DAO is the first decentralized peer-to-pool based NFT liquidity protocol. Borrowers can borrow ETH instantly through the lending pool using NFTs as collateral. Depositors provide ETH liquidity to the lending pool to earn interest.

For more information about BendDAO, please visit https://www.benddao.xyz/. This bug bounty program is focused on smart contracts, website and app, and is focused on preventing:

  • Loss of user NFTs
  • Loss of user ETH

Rewards by Threat Level

Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System V2.1. 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 must come with a PoC with an end-effect impacting an asset-in-scope in order to be considered for a reward. All Smart Contract bug reports require a PoC and a suggestion for a fix to be eligible for a reward. Explanations and statements are not accepted as PoC and code is required.

Critical smart contract vulnerabilities are capped at 10% of economic damage, primarily taking into consideration funds at risk, but also PR and branding aspects, at the discretion of the team. However, there is a minimum reward of USD 50 000.

All vulnerabilities marked in the Certik security review are not eligible for a reward.

Payouts are handled by the BendDAO team directly and are denominated in USD. However, payouts are done in BEND.

The BEND price in USD is calculated by averaging prices over a specified period of time. This period is from the bug submission to the bounty distribution.

Calculation formula:

Day Average Price = (Day High Price + Day Low Price) / 2; Time Weight Average Price = Sum(Day Average Price) / Period;

Smart Contract

Critical
Level
Up to USD $1,000,000
Payout
PoC Required
High
Level
USD $10,000
Payout
PoC Required
Medium
Level
USD $2,000
Payout
PoC Required
Low
Level
USD $1,000
Payout
PoC Required

Websites and Applications

Critical
Level
USD $20,000
Payout
PoC Required
High
Level
USD $4,000
Payout
PoC Required
Medium
Level
USD $2,000
Payout
PoC Required
Low
Level
USD $1,000
Payout
PoC Required

Assets in scope

All smart contracts code of BendDAO can be found at https://github.com/BendDAO. However, only those in the Assets in Scope table are considered as in-scope of the bug bounty program. Though only the proxy contracts are listed as in-scope, current implementation and any further updates to the implementation contracts are considered in scope. When reporting a bug, please make sure to select the relevant proxy and implementation smart contract as the target.

If an impact can be caused to any other asset managed by BendDAO that isn’t on this table but for which the impact is in the Impacts in Scope section below, you are encouraged to submit it for the consideration by the project. This applies to only Critical and High impacts.

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.

Smart Contract

  • Any governance voting result manipulation
    Critical
    Impact
  • Direct theft of any user funds, whether at-rest or in-motion, other than unclaimed yield
    Critical
    Impact
  • Permanent freezing of funds
    Critical
    Impact
  • Miner-extractable value (MEV)
    Critical
    Impact
  • Insolvency
    Critical
    Impact
  • Theft of unclaimed yield
    High
    Impact
  • Permanent freezing of unclaimed yield
    High
    Impact
  • Smart contract unable to operate and call ( e.g. destruct of code, lack of funds)
    Medium
    Impact
  • Block stuffing for profit
    Medium
    Impact
  • Griefing (e.g. no profit motive for an attacker, but damage to the users or the protocol)
    Medium
    Impact
  • Theft of gas
    Medium
    Impact
  • Unbounded gas consumption
    Medium
    Impact
  • Smart contract fails to deliver promised returns, but doesn’t lose value
    Low
    Impact

Websites and Applications

  • Execute arbitrary system commands
    Critical
    Impact
  • 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)
    Critical
    Impact
  • Taking Down the application/website
    Critical
    Impact
  • Subdomain takeover with already-connected wallet interaction
    Critical
    Impact
  • 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.
    Critical
    Impact
  • Direct theft of user funds
    Critical
    Impact
  • Malicious interactions with an already-connected wallet such as modifying transaction arguments or parameters, substituting contract addresses, submitting malicious transactions
    Critical
    Impact
  • Injecting/modifying the static content on the target application without Javascript (Persistent) such as HTML injection without Javascript, replacing existing text with arbitrary text, arbitrary file uploads, etc.
    High
    Impact
  • 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.
    High
    Impact
  • Improperly disclosing confidential user information such as email address, phone number, physical address, etc.
    High
    Impact
  • Subdomain takeover without already-connected wallet interaction
    High
    Impact
  • 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 notification
    Medium
    Impact
  • Injecting/modifying the static content on the target application without Javascript (Reflected) such as reflected HTML injection or loading external site data
    Medium
    Impact
  • Redirecting users to malicious websites (Open Redirect)
    Medium
    Impact
  • Changing details of other users (including modifying browser local storage) without already-connected wallet interaction and with significant user interaction such as iframing leading to modifying the backend/browser state (demonstrate impact with PoC)
    Low
    Impact
  • Any impact involving a publicly released CVE without a working PoC
    Low
    Impact
  • Taking over broken or expired outgoing links such as social media handles, etc.
    Low
    Impact
  • Temporarily disabling user to access target site, such as locking up the victim from login, cookie bombing, etc.
    Low
    Impact

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 reflected HTML injection with or without javascript
    • This does not exclude persistent plain text injection
  • Self-XSS
  • 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