Gnosis Chain

Gnosis Chain is an EVM compatible, community-owned network that prioritizes credible neutrality and resiliency, open to everyone without privilege or prejudice. Secured by over 165k validators around the world, Gnosis Chain has all the tooling you are used to and trust-minimized bridges to mainnet.

For more information about Gnosis Chain, please visit https://www.gnosis.io/.

This bug bounty program is focused on the bridges smart contracts that move assets in between Mainnet and Gnosis chain. The xDai bridge is used to bridge DAI on mainnet and the native xDai coin on Gnosis chain. For more information see https://docs.gnosischain.com/bridges/tokenbridge/xdai-bridge. The OmniBridge is a native token bridge that mints the canonical representation of bridged assets on Gnosis. For more information see https://docs.gnosischain.com/bridges/tokenbridge/omnibridge.

Disclosure of Information relating to Bug Reports: Security researchers may not publish any information about their bug reports (even after any vulnerabilities have been fixed and the security researcher has been paid) unless Gnosis provides written consent in the bug report submission thread.

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 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.

Critical and High 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.

Payouts are handled by the Gnosis Chain team directly and are denominated in USD. However, payouts are done in USDC or xDAI.

The smart contract regarding native xDAI bridging (XDaiForeignBridge and HomeBridgeErcToNative) can be found at https://github.com/gnosischain/tokenbridge-contracts/tree/xdaibridge-upgrade-sda. The smart contracts regarding arbitrary ERC20 bridging (ForeignOmnibridge and HomeOmnibridge) can be found at https://github.com/gnosischain/omnibridge/tree/master.

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 Gnosis 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.

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