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CVE-2023-28626

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Date: March 28, 2023

comrak is a CommonMark + GFM compatible Markdown parser and renderer written in rust. A range of quadratic parsing issues are present in Comrak. These can be used to craft denial-of-service attacks on services that use Comrak to parse Markdown. This issue has been addressed in version 0.17.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as `GHSL-2023-047`

Language: RUST

Severity Score

Related Resources (22)

https://github.com/commonmark/cmark/issues/284
https://github.com/commonmark/cmark/issues/373
https://github.com/kivikakk/comrak
https://github.com/kivikakk/comrak/releases/tag/0.17.0
https://github.com/commonmark/cmark/issues/299
https://github.com/commonmark/cmark/issues/255
https://github.com/commonmark/cmark/issues/388
https://github.com/commonmark/cmark/issues/389
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OUYME2VA555X6567H7ORIJQFN4BVGT6N/
https://github.com/github/cmark-gfm/blob/c32ef78bae851cb83b7ad52d0fbff880acdcd44a/test/pathological_tests.py#L63-L65
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PTWZWCT7KCX2KTXTLPUYZ3EHOONG4X46
https://github.com/commonmark/cmark/issues/218
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VQ3UBC7LE4VPCMZBTADIBL353CH7CPVV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PTWZWCT7KCX2KTXTLPUYZ3EHOONG4X46/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OUYME2VA555X6567H7ORIJQFN4BVGT6N
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VQ3UBC7LE4VPCMZBTADIBL353CH7CPVV
https://nvd.nist.gov/vuln/detail/CVE-2023-28626
https://github.com/kivikakk/comrak/security/advisories/GHSA-8hqf-xjwp-p67v
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#L87-L89
https://www.mend.io/vulnerability-database/CVE-2023-28626

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Insufficient Information

NVD-CWE-noinfo

Top Fix

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Upgrade Version

Upgrade to version comrak - 0.17.0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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