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Two years ago, when we began taking on blockchain security engagements, there were no tools engineered for the work. No static analyzers, fuzzers, or reverse engineering tools for Ethereum. So, we invested significant time and expertise to create what we needed, adapt what we already had, and refine the work continuously over dozens of audits.
Think of what follows as the roadmap. If you are new to blockchain security, just start at the top. You have all you need. To build a secure Ethereum codebase: This repository contains examples of common Ethereum smart contract vulnerabilities, including real code. The repository contains a subdirectory for each class of vulnerability, such as integer overflow , reentrancy , and unprotected functions. Each subdirectory contains its own readme and real-world examples of vulnerable contracts.
Where appropriate, contracts that exploit the vulnerabilities are also provided. We use these examples as test cases for our Ethereum bug-finding tools, listed below. The issues in this repository can be used to measure the effectiveness of other tools you develop or use. If you are a smart contract developer, carefully examine the vulnerable code in this repository to fully understand each issue before writing your own contracts. Slither combines a set of proprietary static analyses on Solidity that detect common mistakes such as bugs in reentrancy, constructors, method access, and more.
Run Slither as you develop, on every new checkin of code. We continuously incorporate new, unique bugs types that we discover in our audits. Echidna applies next-generation smart fuzzing to EVM bytecode. Write Echidna tests for your code after you complete new features. It provides simple, high coverage unit tests that discover security bugs. If you want to write a fancier analysis say, abstract state machine testing , we have support for that too.
Manticore uses symbolic execution to simulate complex multi-contract and multi-transaction attacks against EVM bytecode. Once your app is functional, write Manticore tests to discover hidden, unexpected, or dangerous states that it can enter. Manticore enumerates the execution states of your contract and verifies critical functionality. Manticore will generate a list of all the reachable states including assertion failures and reverts and the inputs that cause them.
It will also automatically flag certain types of issues, like integer overflows and use of uninitialized memory. This reference contains a complete and concise list of EVM opcodes and their implementation details. Ethersplay is a graphical EVM disassembler capable of method recovery, dynamic jump computation, source code matching, and binary diffing. Use Ethersplay to investigate and debug compiled contracts or contracts already deployed to the blockchain.
Ethersplay takes EVM bytecode as input in either ascii hex encoded or raw binary format. Examples of each are test. Ethersplay includes two Binary Ninja plugins to help. To use it, follow the installation instructions in the readme, then open a. Rattle will eventually support storage, memory, and argument recovery as well as static security checks similar to those implemented in Slither. Sign up to be notified if Rattle becomes available. Please, use the tools, file issues in their respective repos, and participate in their feature and bug bounties.
Let us know how they could be better on the Empire Hacking Slack in ethereum. Security for the Blockchain: You are commenting using your WordPress. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Development Tools To build a secure Ethereum codebase: Not So Smart Contracts This repository contains examples of common Ethereum smart contract vulnerabilities, including real code.
Slither Slither combines a set of proprietary static analyses on Solidity that detect common mistakes such as bugs in reentrancy, constructors, method access, and more. Running Slither is simple: Echidna Echidna applies next-generation smart fuzzing to EVM bytecode. Using Echidna is simple: Add some Echidna tests to your existing code like in this example , Run.
Manticore Manticore uses symbolic execution to simulate complex multi-contract and multi-transaction attacks against EVM bytecode. Using the Manticore API to review more advanced contracts is simple: Ethersplay Ethersplay is a graphical EVM disassembler capable of method recovery, dynamic jump computation, source code matching, and binary diffing.
To use Rattle, supply it runtime bytecode from solc or extracted directly from the blockchain: Twitter Reddit Facebook Email Print. Fill in your details below or click an icon to log in: Email required Address never made public. Post was not sent - check your email addresses! Sorry, your blog cannot share posts by email.