Security Blog
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Open sourcing ClusterFuzz
7 February 2019
Posted by Abhishek Arya, Oliver Chang, Max Moroz, Martin Barbella and Jonathan Metzman (ClusterFuzz team)
[Cross-posted from the
Google Open-Source Blog
]
Fuzzing
is an automated method for detecting bugs in software that works by feeding unexpected inputs to a target program. It is effective at finding
memory corruption bugs
, which often have
serious
security
implications
. Manually finding these issues is both difficult and time consuming, and bugs often slip through despite rigorous code review practices. For software projects written in an
unsafe
language such as C or C++, fuzzing is a crucial part of ensuring their security and stability.
In order for fuzzing to be truly effective, it must be continuous, done at scale, and integrated into the development process of a software project. To
provide these features
for Chrome, we wrote ClusterFuzz, a fuzzing infrastructure running on over 25,000 cores. Two years ago, we began offering ClusterFuzz as a free service to open source projects through
OSS-Fuzz
.
Today, we’re announcing that
ClusterFuzz
is now open source and available for anyone to use.
We developed ClusterFuzz over eight years to fit seamlessly into developer workflows, and to make it dead simple to find bugs and get them fixed. ClusterFuzz provides end-to-end automation, from bug detection, to triage (accurate deduplication,
bisection
), to bug reporting, and finally to automatic closure of bug reports.
ClusterFuzz has found more than
16,000
bugs in Chrome and more than
11,000
bugs in over
160
open source projects integrated with OSS-Fuzz. It is an integral part of the development process of Chrome and many other open source projects. ClusterFuzz is often able to detect
bugs
hours after they are introduced and verify the fix within a day.
Check out our
GitHub repository
. You can try ClusterFuzz locally by following these
instructions
. In
production
, ClusterFuzz depends on some key
Google Cloud Platform
services, but you can use your own compute cluster. We welcome your contributions and look forward to any suggestions to help improve and extend this infrastructure. Through open sourcing ClusterFuzz, we hope to encourage all software developers to integrate fuzzing into their workflows.
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