FKIE_CVE-2022-21221
Vulnerability from fkie_nvd - Published: 2022-03-17 12:15 - Updated: 2026-06-17 04:25
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High) - CVSS:3.1/
Summary
The package github.com/valyala/fasthttp before 1.34.0 are vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. **Note:** This security issue impacts Windows users only.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| fasthttp_project | fasthttp | * | |
| microsoft | windows | - |
{
"affected": [
{
"affectedData": [
{
"product": "github.com/valyala/fasthttp",
"vendor": "n/a",
"versions": [
{
"lessThan": "1.34.0",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"source": "report@snyk.io"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:fasthttp_project:fasthttp:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B292937C-1EF2-4FD3-B714-90714DEC82E1",
"versionEndExcluding": "1.34.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
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"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The package github.com/valyala/fasthttp before 1.34.0 are vulnerable to Directory Traversal via the ServeFile function, due to improper sanitization. It is possible to be exploited by using a backslash %5c character in the path. **Note:** This security issue impacts Windows users only."
},
{
"lang": "es",
"value": "El paquete github.com/valyala/fasthttp versiones anteriores a 1.34.0, es vulnerable a un Salto de Directorio por medio de la funci\u00f3n ServeFile, debido a un saneo inapropiado. Puede explotarse usando un car\u00e1cter de barra invertida %5c en la ruta. **Nota:** Este problema de seguridad afecta \u00fanicamente a usuarios de Windows"
}
],
"id": "CVE-2022-21221",
"lastModified": "2026-06-17T04:25:46.757",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 3.6,
"source": "report@snyk.io",
"type": "Secondary"
},
{
"cvssData": {
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-03-17T12:15:08.087",
"references": [
{
"source": "report@snyk.io",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/valyala/fasthttp/commit/15262ecf3c602364639d465daba1e7f3604d00e8"
},
{
"source": "report@snyk.io",
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"url": "https://github.com/valyala/fasthttp/commit/6b5bc7bb304975147b4af68df54ac214ed2554c1"
},
{
"source": "report@snyk.io",
"tags": [
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],
"url": "https://github.com/valyala/fasthttp/issues/1226"
},
{
"source": "report@snyk.io",
"tags": [
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"Third Party Advisory"
],
"url": "https://github.com/valyala/fasthttp/releases/tag/v1.34.0"
},
{
"source": "report@snyk.io",
"tags": [
"Exploit",
"Patch",
"Third Party Advisory"
],
"url": "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMVALYALAFASTHTTP-2407866"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/valyala/fasthttp/commit/15262ecf3c602364639d465daba1e7f3604d00e8"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
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"url": "https://github.com/valyala/fasthttp/commit/6b5bc7bb304975147b4af68df54ac214ed2554c1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://github.com/valyala/fasthttp/issues/1226"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://github.com/valyala/fasthttp/releases/tag/v1.34.0"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"Patch",
"Third Party Advisory"
],
"url": "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMVALYALAFASTHTTP-2407866"
}
],
"sourceIdentifier": "report@snyk.io",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-22"
}
],
"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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