Bug bounty (Immunefi)
Summary: We recognise that gifted coders may find vulnerabilities in our code that we could not - even though our products have yet to be compromised.
Note: We orginized Bug bounty with Immunefi (https://immunefi.com/bounty/multichain/), however, if some vulnerabilities you found is out of scope according to rules of Immunefi, you can report it through mail security@multichain.org directly.
Multichain Bug Bounties up to $2M
This bug bounty program is focused on Multichain's smart contracts, website and app and is focused on preventing:
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)
Insolvency
Rewards by threat level
Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System V2. 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.
Smart Contracts
Level | Rewards |
Critical | Up to USD 2 000 000 |
High | USD 100 000 |
Medium | USD 10 000 |
Low | USD 1 000 |
Websites and Applications
Level | Rewards |
Critical | USD 200 000 |
High | USD 50 000 |
Medium | USD 5 000 |
Low | USD 1 000 |
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 Critical 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 100 000.
All vulnerabilities marked in the security reviews are not eligible for a reward.
Payouts are handled by the Multichain teamdirectly and are denominated in USD. However, payouts are done in USDC.
Assets in Scope
Target | Type |
Smart Contract - AnyswapV6Router | |
Smart Contract - AnyswapV6ERC20 | |
Smart Contract - AnyCallProxy | |
Smart Contract - MultiDao | |
Smart Contract - SwapTokens | |
Smart Contract - MultichainToken | |
Web/App - Main Web App Multichain | |
Web/App - Anyswap | |
Web/App - Main App |
All smart contracts of Multichain can be found at https://github.com/anyswap. However, only those in the Assets in Scope table are considered as in-scope of the bug bounty program.
If an impact can be caused to any other asset managed by Multichain that isn't on this table but for which the impact is in the Impacts in Scope section, you are encouraged to submit it for the consideration of 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 the scope table.
Smart Contracts
Critical
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)
Insolvency
High
Theft of unclaimed yield
Permanent freezing of unclaimed yield
Temporary freezing of funds for a minimum period of 2 days
Medium
Smart contract unable to operate due to lack of funds
Block stuffing for profit
Griefing (e.g. no profit motive for an attacker, but damage to the users or the protocol)
Theft of gas
Unbounded gas consumption
Low
Smart contract fails to deliver promised returns, but doesn't lose value
Websites and Applications
Critical
Ability to execute system commands
Extract Sensitive data/files from the server such as /etc/passwd
Stealing User Cookies
Taking Down the application/website
Bypassing Authentication
Signing transactions for other users
Redirection of user deposits and withdrawals
Subdomain takeover resulting in financial loss (applicable for subdomains with addresses published)
Wallet interaction modification resulting in financial loss
Direct theft of user funds
Tampering with transactions submitted to the user's wallet
Submitting malicious transactions to an already-connected wallet
High
Spoofing content on the target application (Persistent)
Users Confidential information disclosure such as Email
Subdomain Takeover without financial loss (applicable for subdomains with no addresses published)
Privilege escalation to access unauthorized functionalities
Medium
Changing details of other users without direct financial impact (CSRF)
Third-Party API keys leakage that demonstrates loss of funds or modification on the website.
Redirecting users to malicious websites (Open Redirect)
Low
Framing sensitive pages leading to financial loss (ClickJacking)
Any impact involving a publicly released CVE without a working PoC
Broken Link Hijacking
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
Content spoofing / Text injection issues
Self-XSS
Captcha bypass using OCR
CSRF with no security impact (logout CSRF, change language, etc.)
Missing HTTP Security Headers (such as X-FRAME-OPTIONS) or cookie security flags (such as "httponly")
Server-side information disclosure such as IPs, server names, and most stack traces
Vulnerabilities used to enumerate or confirm the existence of users or tenants
Vulnerabilities requiring unlikely user actions
URL Redirects (unless combined with another vulnerability to produce a more severe vulnerability)
Lack of SSL/TLS best practices
DDoS vulnerabilities
Attacks requiring privileged access from within the organization
Feature requests
Best practices
Vulnerabilities primarily caused by browser/plugin defects
Any vulnerability exploit requiring CSP bypass resulting from a browser bug
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
About Immunefi
Immunefi is a leading security services provider in Web3, it facilitates a platform that connects Web3 projects in need of watchdogs for their platform and white hat hackers, who get to monetize their expertise by finding potential bugs in the associated projects.
Immunefi can manage bug bounty programs for their clients so that they are able to find and fix bugs in an ethical, efficient, and safe environment that respects client discretion. The platform is used by leading Web3 projects like Synthetix, Compound, SushiSwap, and Chainlink.
All award decisions, including eligibility and payment amount, are at Multichain sole discretion. Multichain reserves the right to refuse to submit and change the terms and conditions of the Program.
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