Since 2012, Trail of Bits has helped secure some of the world's most targeted organizations and products. We combine high-end security research with a real world attacker mentality to reduce risk and fortify code.
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Trail of Bits is publicly disclosing CVE-2022-35737, which affects applications that use the SQLite library API. CVE-2022-35737 was introduced in SQLite version 1.0.12 (released on October 17, 2000) and fixed in release 3.39.2 (released on July 21, 2022). CVE-2022-35737 is exploitable on 64-bit systems, and…
Near the end of 2022, Trail of Bits was hired by the Open Source Technology Improvement Fund (OSTIF) to perform a security assessment of the cURL file transfer command-line utility and its library, libcurl. The scope of our engagement included a code review, a threat model, and the subject of this blog […]
If you love exploit mitigations, you may have heard of a new system call named mseal landing into the Linux kernel’s 6.10 release, providing a protection called “memory sealing.” Beyond notes from the authors, very little information about this mitigation exists. In this blog post, we’ll explain what this syscall is…
File parsers in Go contain unexpected behaviors that can lead to serious security vulnerabilities. This post examines how JSON, XML, and YAML parsers in Go handle edge cases in ways that have repeatedly resulted in high-impact security issues in production systems. We explore three real-world attack scenarios…
The Trail of Bits Assurance practice has received an influx of Go projects, following the success of our Kubernetes assessment this summer. As a result, we’ve been adapting for Go projects some of the security assessment techniques and tactics we’ve used with other compiled languages. We started by understanding the…
Fuzzing—one of the most successful techniques for finding security bugs, consistently featured in articles and industry conferences—has become so popular that you may think most important software has already been extensively fuzzed. But that’s not always the case. In this blog post, we show how we fuzzed the ZBar…
We’re working on integrating an ASN.1 API into PyCA Cryptography, built on top of the same Rust ASN.1 implementation already used by Cryptography’s X.509 APIs.
GDB loses significant functionality when debugging binaries that lack debugging symbols (also known as “stripped binaries”). Function and variable names become meaningless addresses; setting breakpoints requires tracking down relevant function addresses from an external source; and printing out structured values…
In fall 2022, Trail of Bits audited cURL, a widely-used command-line utility that transfers data between a server and supports various protocols. The project coincided with a Trail of Bits maker week, which meant that we had more manpower than we usually do, allowing us to take a nonstandard approach to the […]
Clang is a marvelous compiler; it’s a compiler’s compiler! But it isn’t a toolsmith’s compiler. As a toolsmith, my ideal compiler would be an open book, allowing me to get to everywhere from anywhere. The data on which my ideal compiler would operate (files, macros, tokens), their eventual interpretation…
With 2019 a day away, let’s reflect on the past to see how we can improve. Yes, let’s take a long look back 30 years and reflect on the original fuzzing paper, An Empirical Study of the Reliability of UNIX Utilities, and its 1995 follow-up, Fuzz Revisited, by Barton P. Miller. In this blog post, […]
See how we slashed PyPI’s test suite runtime from 163 to 30 seconds. The techniques we share can help you dramatically improve your own project’s testing performance without sacrificing coverage.
We recently released a new differential testing tool, called DIFFER, for finding bugs and soundness violations in transformed programs. DIFFER combines elements from differential, regression, and fuzz testing to help users find bugs in programs that have been altered by software rewriting, debloating, and hardening…
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…