FKIE_CVE-2023-22485
Vulnerability from fkie_nvd - Published: 2023-01-24 01:15 - Updated: 2026-06-17 05:35
Severity
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/
Summary
cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the `validate_protocol` function. We believe this bug is harmless in practice, because the out-of-bounds read accesses `malloc` metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvr | Exploit, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/github/cmark-gfm/security/advisories/GHSA-c944-cv5f-hpvr | Exploit, Third Party Advisory |
{
"affected": [
{
"affectedData": [
{
"product": "cmark-gfm",
"vendor": "github",
"versions": [
{
"status": "affected",
"version": "\u003c 0.29.0.gfm.7"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
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"criteria": "cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*",
"matchCriteriaId": "BEFD0856-0CFF-4D0F-B9D5-02F4A537C5CE",
"versionEndExcluding": "0.29.0.gfm.7",
"vulnerable": true
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"cveTags": [],
"descriptions": [
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"lang": "en",
"value": "cmark-gfm is GitHub\u0027s fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior 0.29.0.gfm.7, a crafted markdown document can trigger an out-of-bounds read in the `validate_protocol` function. We believe this bug is harmless in practice, because the out-of-bounds read accesses `malloc` metadata without causing any visible damage.This vulnerability has been patched in 0.29.0.gfm.7."
},
{
"lang": "es",
"value": "cmmark-gfm es la bifurcaci\u00f3n de GitHub de cmark, una librer\u00eda y programa de an\u00e1lisis y representaci\u00f3n de CommonMark en C. En versiones anteriores a la 0.29.0.gfm.7, un documento de rebajas manipulado puede desencadenar una lectura fuera de los l\u00edmites en la funci\u00f3n `validate_protocol` . Creemos que este error es inofensivo en la pr\u00e1ctica, porque la lectura fuera de los l\u00edmites accede a los metadatos \"malloc\" sin causar ning\u00fan da\u00f1o visible. Esta vulnerabilidad ha sido parcheada en 0.29.0.gfm.7."
}
],
"id": "CVE-2023-22485",
"lastModified": "2026-06-17T05:35:33.767",
"metrics": {
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{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"confidentialityImpact": "LOW",
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"ssvcV203": [
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{
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],
"role": "CISA Coordinator",
"timestamp": "2025-03-10T21:02:09.252840Z",
"version": "2.0.3"
}
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"published": "2023-01-24T01:15:10.593",
"references": [
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"tags": [
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"value": "CWE-91"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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