As part of our Coordinated Vulnerability Disclosure Policy, we operate a bug bounty. See the policy for more details on submissions and rewards.

The following is a list of examples of the kinds of bugs we're most interested in for the Cosmos SDK. See here for vulnerabilities we are interested in for Tendermint, and lower-level libraries, e.g. IAVL.

• x/staking
• x/slashing
• x/types
• x/gov

We are interested in bugs in other modules, however the above are most likely to have significant vulnerabilities, due to the complexity / nuance involved

• Integer operations on tx parameters, especially sdk.Int / sdk.Uint
• Gas calculation & parameter choices
• Tx signature verification (code in x/auth/ante.go)
• Possible Node DoS vectors. (Perhaps due to Gas weighting / non constant timing)

• HD key derivation, local and Ledger, and all key-management functionality
• Side-channel attack vectors with our implementations
  • e.g. key exfiltration based on time or memory-access patterns when decrypting privkey