If you work on deep learning systems, check out our new tool, PrivacyRaven—it’s a Python library that equips engineers and researchers with a comprehensive testing suite for simulating privacy attacks on deep learning systems. Because deep learning enables software to perform tasks without explicit programming, it’s become ubiquitous in […]
Graphtage is a command line utility and underlying library for semantically comparing and merging tree-like structures such as JSON, JSON5, XML, HTML, YAML, and TOML files. Its name is a portmanteau of “graph” and “graftage” (i.e., the horticultural practice of joining two trees together so they grow as one). Read on for what Graphtage does differently and better, why we developed it, how it works, and directions for using it as a library.
In this post, we’ll show you how to test your smart contracts with the Echidna fuzzer. In particular, you’ll see how to: Find a bug we discovered during the Set Protocol audit using a variation of differential fuzzing, and Specify and check useful properties for your own smart contract libraries. And we’ll demonstrate how to […]
TL;DR: Sinter is the first available open-source endpoint protection agent written entirely in Swift, with support for Apple’s new EndpointSecurity API from first principles. Sinter demonstrates how to build a successful event-authorization security agent, and incorporates solutions to many of the challenges that all endpoint protection agents will face as they migrate from kernel-mode to […]
The initial release of yVault contained logic for computing the price of yUSDC that could be manipulated by an attacker to drain most (if not all) of the pool’s assets. Fortunately, Andre, the developer, reacted incredibly quickly and disabled the faulty code, securing the approximately 400,000 USD held at the time. However, this bug still […]
Smart contract authors can now express security properties in the same language they use to write their code (Solidity) and our new tool, manticore-verifier, will automatically verify those invariants. Even better, Echidna and Manticore share the same format for specifying property tests. In other words, smart contract authors can now write one property test and […]
As a company, we believe Black lives matter. In the face of continued police brutality, racial disparities in law enforcement, and limited accountability, we demand an end to systemic racism, endorse restrictions on police use of force, and seek greater accountability for police actions. We believe police misconduct, militarization of police, and unchecked abuse of […]
Upgradeable contracts are not as safe as you think. Architectures for upgradeability can be flawed, locking contracts, losing data, or sabotaging your ability to recover from an incident. Every contract upgrade must be carefully reviewed to avoid catastrophic mistakes. The most common delegatecall proxy comes with drawbacks that we’ve catalogued before. Crytic now includes a […]
The elliptic curve digital signature algorithm (ECDSA) is a common digital signature scheme that we see in many of our code reviews. It has some desirable properties, but can also be very fragile. For example, LadderLeak was published just a couple of weeks ago, which demonstrated the feasibility of key recovery with a side channel […]
TL;DR: Can we check if a mutex is locked in Go? Yes, but not with a mutex API. Here’s a solution for use in debug builds. Although you can Lock() or Unlock() a mutex, you can’t check whether it’s locked. While it is a reasonable omission (e.g., due to possible race conditions; see also Why […]
Over the last few months, we’ve been fuzzing solc, the standard Solidity smart contract compiler, and we’ve racked up almost 20 (now mostly fixed) new bugs. A few of these are duplicates of existing bugs with slightly different symptoms or triggers, but the vast majority are previously unreported bugs in the compiler. This has been […]
OpenSSL is one of the most popular cryptographic libraries out there; even if you aren’t using C/C++, chances are your programming language’s biggest libraries use OpenSSL bindings as well. It’s also notoriously easy to mess up due to the design of its low-level API. Yet many of these mistakes fall into […]
TL;DR: We’ve open-sourced a new library, μthenticode, for verifying Authenticode signatures on Windows PE binaries without a Windows machine. We’ve also integrated it into recent builds of Winchecksec, so that you can use it today to verify signatures on your Windows executables! As a library, μthenticode aims to be a breeze to integrate: It’s written […]
The Trail of Bits Winternship is our winter internship program where we invite 10-15 students to join us over the winter break for a short project that has a meaningful impact on information security. They work remotely with a mentor to create or improve tools that solve a single impactful problem. These paid internships give […]
We, along with our partner Matthew Green at Johns Hopkins University, are using zero-knowledge (ZK) proofs to establish a trusted landscape in which tech companies and vulnerability researchers can communicate reasonably with one another without fear of being sabotaged or scorned. Over the next four years, we will push the state of the art in […]
