FKIE_CVE-2021-46784
Vulnerability from fkie_nvd - Published: 2022-07-17 22:15 - Updated: 2026-06-17 04:15
Severity
Summary
In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| squid-cache | squid | * | |
| squid-cache | squid | * | |
| squid-cache | squid | * | |
| debian | debian_linux | 10.0 | |
| debian | debian_linux | 11.0 | |
| debian | debian_linux | 12.0 |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
"matchCriteriaId": "FC9F2659-B37B-4E7B-AE40-B91BF3CE4E88",
"versionEndIncluding": "3.5.28",
"versionStartIncluding": "3.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
"matchCriteriaId": "AD4A9EF2-CA36-4C09-8A67-6AE01B16E04E",
"versionEndIncluding": "4.17",
"versionStartIncluding": "4.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
"matchCriteriaId": "56C44696-C2E8-42DC-877F-B97943F8DD87",
"versionEndExcluding": "5.6",
"versionStartIncluding": "5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*",
"matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses."
},
{
"lang": "es",
"value": "En Squid versiones 3.x hasta 3.5.28, versiones 4.x hasta 4.17 y versiones 5.x anteriores a 5.6, debido a una administraci\u00f3n inapropiada del b\u00fafer, puede producirse una denegaci\u00f3n de servicio cuando son procesadas respuestas largas del servidor Gopher"
}
],
"id": "CVE-2021-46784",
"lastModified": "2026-06-17T04:15:34.057",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-07-17T22:15:08.737",
"references": [
{
"source": "cve@mitre.org",
"url": "http://www.openwall.com/lists/oss-security/2023/10/13/1"
},
{
"source": "cve@mitre.org",
"url": "http://www.openwall.com/lists/oss-security/2023/10/13/10"
},
{
"source": "cve@mitre.org",
"url": "http://www.openwall.com/lists/oss-security/2023/10/21/1"
},
{
"source": "cve@mitre.org",
"tags": [
"Broken Link"
],
"url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
},
{
"source": "cve@mitre.org",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
},
{
"source": "cve@mitre.org",
"tags": [
"Mitigation",
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security-tracker.debian.org/tracker/CVE-2021-46784"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2023/10/13/1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2023/10/13/10"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2023/10/21/1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "http://www.squid-cache.org/Versions/v4/changesets/SQUID-2021_7.patch"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "http://www.squid-cache.org/Versions/v5/changesets/SQUID-2021_7.patch"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/squid-cache/squid/commit/5e2ea2b13bd98f53e29964ca26bb0d602a8a12b9"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mitigation",
"Patch",
"Third Party Advisory"
],
"url": "https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security-tracker.debian.org/tracker/CVE-2021-46784"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20221223-0007/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-617"
}
],
"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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