commonmarkerv0.23.10: 2 vulnerabilities (highest severity is: 7.5) - autoclosed

Vulnerable Library - commonmarkerv0.23.10

Ruby wrapper for the comrak (CommonMark parser) Rust crate

Library home page: https://github.com/gjtorikian/commonmarker.git

Found in HEAD commit: 8b41f7ce8d6c07e29a42e0ea31df76af3689cdc0

Vulnerable Source Files (1)

/vendor/bundle/ruby/3.2.0/gems/commonmarker-0.23.10/ext/commonmarker/render.h

Vulnerabilities

CVE	Severity	CVSS	Dependency	Type	Fixed in (commonmarkerv0.23.10 version)	Remediation Possible**
CVE-2023-26485	High	7.5	commonmarkerv0.23.10	Direct	commonmarker - 0.23.9	❌
CVE-2023-24824	High	7.5	detected in multiple dependencies	Direct	commonmarker - 0.23.9	❌

**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation

Details

CVE-2023-26485

### Vulnerable Library - commonmarkerv0.23.10

Ruby wrapper for the comrak (CommonMark parser) Rust crate

Library home page: https://github.com/gjtorikian/commonmarker.git

Found in HEAD commit: 8b41f7ce8d6c07e29a42e0ea31df76af3689cdc0

Found in base branch: main

### Vulnerable Source Files (1)

/vendor/bundle/ruby/3.2.0/gems/commonmarker-0.23.10/ext/commonmarker/render.h

### Vulnerability Details

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either large numbers of `_` characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised to upgrade. Users unable to upgrade should validate that their input comes from trusted sources. ### Impact A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. ### Proof of concept ``` $ ~/cmark-gfm$ python3 -c 'pad = "_" * 100000; print(pad + "." + pad, end="")' | time ./build/src/cmark-gfm --to plaintext ``` Increasing the number 10000 in the above commands causes the running time to increase quadratically. ### Patches This vulnerability have been patched in 0.29.0.gfm.10. ### Note on cmark and cmark-gfm XXX: TBD [cmark-gfm](https://github.com/github/cmark-gfm) is a fork of [cmark](https://github.com/commonmark/cmark) that adds the GitHub Flavored Markdown extensions. The two codebases have diverged over time, but share a common core. These bugs affect both `cmark` and `cmark-gfm`. ### Credit We would like to thank @gravypod for reporting this vulnerability. ### References https://en.wikipedia.org/wiki/Time_complexity ### For more information If you have any questions or comments about this advisory: * Open an issue in [github/cmark-gfm](https://github.com/github/cmark-gfm)

Publish Date: 2023-03-31

URL: CVE-2023-26485

### CVSS 3 Score Details (7.5)

Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High

For more information on CVSS3 Scores, click here.

### Suggested Fix

Type: Upgrade version

Origin: https://github.com/advisories/GHSA-48wp-p9qv-4j64

Release Date: 2023-03-31

Fix Resolution: commonmarker - 0.23.9

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CVE-2023-24824

### Vulnerable Libraries - commonmarkerv0.23.10, commonmarkerv0.23.10