kivikakk/comrak · Security
Comrak vulnerable to quadratic runtime issues when parsing Markdown (GHSL-2023-047)
- GHSA ID
- GHSA-8hqf-xjwp-p67v
- CVE ID
- CVE-2023-28626
- Severity
- medium
- Published
- Updated
- CVSS
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Description
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
CWEs
- CWE-400 · Uncontrolled Resource Consumption
References
- https://github.com/kivikakk/comrak/security/advisories/GHSA-8hqf-xjwp-p67v ↗
- https://github.com/commonmark/cmark/issues/218 ↗
- https://github.com/commonmark/cmark/issues/255 ↗
- https://github.com/commonmark/cmark/issues/284 ↗
- https://github.com/commonmark/cmark/issues/299 ↗
- https://github.com/commonmark/cmark/issues/373 ↗
- https://github.com/commonmark/cmark/issues/388 ↗
- https://github.com/commonmark/cmark/issues/389 ↗
- https://github.com/commonmark/cmark/pull/232 ↗
- https://github.com/kivikakk/comrak/commit/ce795b7f471b01589f842dc09af38b025701178d ↗
- 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 ↗
- https://github.com/kivikakk/comrak/releases/tag/0.17.0 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-28626 ↗
- https://lists.fedoraproject.org/archives/list/[email protected]/message/OUYME2VA555X6567H7ORIJQFN4BVGT6N/ ↗
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PTWZWCT7KCX2KTXTLPUYZ3EHOONG4X46/ ↗
- https://lists.fedoraproject.org/archives/list/[email protected]/message/VQ3UBC7LE4VPCMZBTADIBL353CH7CPVV/ ↗
- https://github.com/advisories/GHSA-8hqf-xjwp-p67v ↗