def9bc2e16
Sizes, offsets and lengths in a native-image binary all come from the file being parsed, and several were acted on directly. The PE export directory sized a `make([]byte, Size)` from a uint32 in the optional header, so an 8KB file claiming 4GB reserved 4GB before reading a byte. It now reads what the file actually holds, bounded by the declared size, and still requires the whole directory to be present. This also fixes a latent bug: `unionreader.readerAtAdapter.ReadAt` can return a short read with a nil error, and the old code discarded the count, so squashfs-sourced binaries could parse zero padding as export data. The bounds checks in `decompressSbom` and the PE export walk validated only the end of a range, computed by adding to a value out of the file. Those sums wrap, and a wrapped sum compares as in range while the slice that follows it panics. They now subtract from the known-good length instead. The three `address - sectionBase` subtractions are unsigned and underflowed on an address below the base; they share one guarded helper now. The embedded SBOM decompresses through an `io.LimitedReader`, since the compressed bytes are bounded by the file but what they expand to is not. The limit is checked before the decoder's own error, which would otherwise report a size problem as "not a cyclonedx json document". Hitting it is logged, since the caller reports parse failures at trace level and a dropped SBOM would otherwise go unnoticed. Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
Syft
A CLI tool and Go library for generating a Software Bill of Materials (SBOM) from container images and filesystems. Exceptional for vulnerability detection when used with a scanner like Grype.
Features
- Generates SBOMs for container images, filesystems, archives (see the docs for a full list of supported scan targets)
- Supports dozens of packaging ecosystems (e.g. Alpine (apk), Debian (dpkg), RPM, Go, Python, Java, JavaScript, Ruby, Rust, PHP, .NET, and many more)
- Supports OCI, Docker, Singularity, and more image formats
- Works seamlessly with Grype for vulnerability scanning
- Multiple output formats (CycloneDX, SPDX, Syft JSON, and more) including the ability to convert between SBOM formats
- Create signed SBOM attestations using the in-toto specification
Tip
New to Syft? Check out the Getting Started guide for a walkthrough!
Installation
The quickest way to get up and going:
curl -sSfL https://get.anchore.io/syft | sudo sh -s -- -b /usr/local/bin
Tip
See Installation docs for more ways to get Syft, including Homebrew, Docker, Scoop, Chocolatey, Nix, and more!
The basics
See the packages within a container image or directory:
# container image
syft alpine:latest
# directory
syft ./my-project
To get an SBOM, specify one or more output formats:
# SBOM to stdout
syft <image> -o cyclonedx-json
# Multiple SBOMs to files
syft <image> -o spdx-json=./spdx.json -o cyclonedx-json=./cdx.json
Tip
Check out the Getting Started guide to explore all of the capabilities and features.
Want to know all of the ins-and-outs of Syft? Check out the CLI docs, configuration docs, and JSON schema.
Contributing
We encourage users to help make these tools better by submitting issues when you find a bug or want a new feature. Check out our contributing overview and developer-specific documentation if you are interested in providing code contributions.
Syft development is sponsored by Anchore, and is released under the Apache-2.0 License.
The Syft logo by Anchore is licensed under CC BY 4.0
For commercial support options with Syft or Grype, please contact Anchore.
Come talk to us!
The Syft Team holds regular community meetings online. All are welcome to join to bring topics for discussion.
- Check the calendar for the next meeting date.
- Add items to the agenda (join this group for write access to the agenda)
- See you there!