Horizon Finance

Program Overview

Horizon Finance allows participants to deposit their assets (any kind the platform supports) with a fixed or floating interest rate, and get reward according to the interest rate they chose with an order according to how many assets they deposited.

For more information about Horizon, please read the Horizon Whitepaper.

The bug bounty program covers its smart contracts and apps and is focused on the prevention of loss of user funds, denial of service, and data breaches and data leaks.

Rewards by Threat Level

Rewards are distributed according to the impact of the vulnerability based on the Immunefi Vulnerability Severity Classification System. This is a simplified 5-level scale, with separate scales for websites/apps and smart contracts/blockchains, encompassing everything from consequence of exploitation to privilege required to likelihood of a successful exploit.

Smart Contracts and Blockchain

Level
Critical	USD $400,000*
High	USD $20,000
Medium	USD $5,000
Low	USD $1,000

*The final reward amount is capped at 10% of the funds at risk based on the vulnerability reported.

Website and Apps

Level
Critical	USD $20,000
High	USD $7,500
Medium	USD $1,000

For high-level web and app bugs to be accepted, there has to be a proof of user data leak, not just a potential breach, otherwise, this would qualify as Medium. Additionally, web and app bug reports without proof of concept exploits with demonstrated impact, as well as recommendations for new features, are not accepted.

Payouts are handled by the Horizon Finance team directly and are denominated in USD. Payouts are done in a stablecoin (USDC or DAI) until the project is fully live. Once the project is live, up to 50% of rewards may be paid out in HRZ.

The final payout amount is determined by the exploitability of the bug reported and the impact on user funds.

Assets in Scope

Target	Type
https://github.com/Horizonfinance2020/horizon-web-front-end	Web/App*
https://beta.horizon.finance/#/index	Web/App*
https://github.com/Horizonfinance2020/horizon-contract	Smart contract

*Only web/app vulnerabilities that directly affect this asset are accepted within the bug bounty program. All others are out of scope.

Prioritized Vulnerabilities

We are especially interested in receiving and rewarding vulnerabilities of the following types:

Smart Contracts/Blockchain:

• Re-entrancy
• Logic errors
  • including user authentication errors
• Solidity/EVM details not considered
  • including integer over-/under-flow
  • including unhandled exceptions
• Trusting trust/dependency vulnerabilities
  • including composability vulnerabilities
• Oracle failure/manipulation
• Novel governance attacks
• Economic/financial attacks
  • including flash loan attacks
• Congestion and scalability
  • including running out of gas
  • including block stuffing
  • including susceptibility to frontrunning
• Consensus failures
• Cryptography problems
  • Signature malleability
  • Susceptibility to replay attacks
  • Weak randomness
  • Weak encryption
• Susceptibility to block timestamp manipulation
• Missing access controls / unprotected internal or debugging interfaces

Websites and Apps

• Remote Code Execution
• Trusting trust/dependency vulnerabilities
• Vertical Privilege Escalation
• XML External Entities Injection
• SQL Injection
• LFI/RFI
• Horizontal Privilege Escalation
• Stored XSS
• Reflective XSS with impact
• CSRF with impact
• Direct object reference
• Internal SSRF
• Session fixation
• Insecure Deserialization
• DOM XSS
• SSL misconfigurations
• SSL/TLS issues (weak crypto, improper setup)
• URL redirect
• Clickjacking (must be accompanied with PoC)
• Misleading Unicode text (e.g. using right to left override characters)

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

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

The following activities are prohibited by 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