Gnosis Chain

Submit a Bug
10 February 2022
Live since
No
KYC required
$2,000,000
Maximum bounty

Program Overview

Gnosis chain, previously known as xDai, is a stable payments EVM (Ethereum Virtual Machine) blockchain designed for fast and inexpensive transactions. The chain uses a unique dual-token model; xDai is a stable token used for transactions, payments, and fees, and STAKE currently supports the underlying POSDAO Proof-of-Stake consensus.

For more information about Gnosis Chain, please visit https://www.xdaichain.com/

This bug bounty program is focused on their smart contracts.

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.

All 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.

All Critical smart contract vulnerabilities are further capped at 10% of economic damage, primarily taking into consideration the funds at risk. However, there is a minimum reward of USD 50 000.

Payouts are handled by the Gnosis Chain team directly and are denominated in USD. However, payouts are done in USDT for payments up to USD 100 000. All remaining rewards are paid in STAKE.

Smart Contract

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

Assets in 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

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)
  • 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

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