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1.7 KiB

Security

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

Here is a list of examples of the kinds of bugs we're most interested in:

Specification

  • Conceptual flaws
  • Ambiguities, inconsistencies, or incorrect statements
  • Mis-match between specification and implementation of any component

Consensus

Assuming less than 1/3 of the voting power is Byzantine (malicious):

  • Validation of blockchain data structures, including blocks, block parts, votes, and so on
  • Execution of blocks
  • Validator set changes
  • Proposer round robin
  • Two nodes committing conflicting blocks for the same height (safety failure)
  • A correct node signing conflicting votes
  • A node halting (liveness failure)
  • Syncing new and old nodes

Networking

  • Authenticated encryption (MITM, information leakage)
  • Eclipse attacks
  • Sybil attacks
  • Long-range attacks
  • Denial-of-Service

RPC

  • Write-access to anything besides sending transactions
  • Denial-of-Service
  • Leakage of secrets

Denial-of-Service

Attacks may come through the P2P network or the RPC:

  • Amplification attacks
  • Resource abuse
  • Deadlocks and race conditions
  • Panics and unhandled errors

Libraries

  • Serialization (Amino)
  • Reading/Writing files and databases
  • Logging and monitoring

Cryptography

  • Elliptic curves for validator signatures
  • Hash algorithms and Merkle trees for block validation
  • Authenticated encryption for P2P connections

Light Client

  • Validation of blockchain data structures
  • Correctly validating an incorrect proof
  • Incorrectly validating a correct proof
  • Syncing validator set changes