GHSA-8hqf-xjwp-p67v

Comrak vulnerable to quadratic runtime issues when parsing Markdown (GHSL-2023-047)

Source: GitHub Advisory Database (reviewed) Moderate CVE-2023-28626

Packages

Ecosystem	Package	Affected	Fixed in
crates.io	comrak	< 0.17.0	0.17.0

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact A range of quadratic parsing issues from `cmark`/`cmark-gfm` are also present in Comrak. These can be used to craft denial-of-service attacks on services that use Comrak to parse Markdown. ### Patches 0.17.0 contains fixes to known quadratic parsing issues. ### Workarounds n/a ### References * https://github.com/commonmark/cmark/issues/255 * https://github.com/commonmark/cmark/issues/389 * https://github.com/commonmark/cmark/issues/373 * https://github.com/commonmark/cmark/issues/299 * https://github.com/commonmark/cmark/issues/388 * https://github.com/commonmark/cmark/issues/284 * https://github.com/commonmark/cmark/issues/218 * https://github.com/commonmark/cmark/pull/232 * https://github.com/github/cmark-gfm/blob/c32ef78bae851cb83b7ad52d0fbff880acdcd44a/test/pathological_tests.py#L63-L65 * https://github.com/github/cmark-gfm/blob/c32ef78bae851cb83b7ad52d0fbff880acdcd44a/test/pathological_tests.py#L87-L89

References

External links from the advisory. They lead to third-party sites.