FKIE_CVE-2021-29627
Vulnerability from fkie_nvd - Published: 2021-04-07 15:15 - Updated: 2026-06-17 03:48
Severity
Summary
In FreeBSD 13.0-STABLE before n245050, 12.2-STABLE before r369525, 13.0-RC4 before p0, and 12.2-RELEASE before p6, listening socket accept filters implementing the accf_create callback incorrectly freed a process supplied argument string. Additional operations on the socket can lead to a double free or use after free.
References
{
"affected": [
{
"affectedData": [
{
"product": "FreeBSD",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "FreeBSD 12.2-RELEASE before p6"
}
]
}
],
"source": "secteam@freebsd.org"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*",
"matchCriteriaId": "17AC6343-11EC-4586-91EB-D7C4D4C1699E",
"versionEndExcluding": "12.2",
"versionStartIncluding": "12.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:*",
"matchCriteriaId": "73D9C08B-8F5B-40C4-A5BD-B00D2E4C012D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:12.2:p1:*:*:*:*:*:*",
"matchCriteriaId": "62A178A3-6A52-4981-9A27-FB07AD8AF778",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:12.2:p2:*:*:*:*:*:*",
"matchCriteriaId": "54A487B1-E5CE-4C76-87E8-518D24C5D86D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:beta1:*:*:*:*:*:*",
"matchCriteriaId": "7412DBD8-BB1F-48A8-AAE1-BA5C8D7BDDF7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:beta2:*:*:*:*:*:*",
"matchCriteriaId": "833DFF5B-BC50-424A-ABCF-EC632F421B76",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:beta3:*:*:*:*:*:*",
"matchCriteriaId": "9F27016E-4117-4094-BB7A-9C56E38024D9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:beta4:*:*:*:*:*:*",
"matchCriteriaId": "B149BF69-951D-47B4-996C-9E4773DA75B7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:rc1:*:*:*:*:*:*",
"matchCriteriaId": "FC271C93-EB83-4301-B7BA-F3249B71B1EA",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:rc2:*:*:*:*:*:*",
"matchCriteriaId": "04329338-AC28-4A74-BE6B-CE8EC6CC37B7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:freebsd:freebsd:13.0:rc3:*:*:*:*:*:*",
"matchCriteriaId": "ADBA841F-5C83-4759-84B7-B59DA1B12EA8",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In FreeBSD 13.0-STABLE before n245050, 12.2-STABLE before r369525, 13.0-RC4 before p0, and 12.2-RELEASE before p6, listening socket accept filters implementing the accf_create callback incorrectly freed a process supplied argument string. Additional operations on the socket can lead to a double free or use after free."
},
{
"lang": "es",
"value": "En FreeBSD versiones 13.0-STABLE anteriores a n245050, versiones 12.2-STABLE anteriores a r369525, versiones 13.0-RC4 anteriores a p0 y versiones 12.2-RELEASE anteriores a p6, los filtros de aceptaci\u00f3n de socket de escucha que implementan la devoluci\u00f3n de llamada accf_create liberaron incorrectamente una cadena de argumentos proporcionada por el proceso. Las operaciones adicionales en el socket pueden conllevar a una doble liberaci\u00f3n o un uso de la memoria previamente liberada"
}
],
"id": "CVE-2021-29627",
"lastModified": "2026-06-17T03:48:03.363",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.2,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 10.0,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-04-07T15:15:13.763",
"references": [
{
"source": "secteam@freebsd.org",
"tags": [
"Vendor Advisory"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc"
},
{
"source": "secteam@freebsd.org",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20210423-0007/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-21:09.accept_filter.asc"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.netapp.com/advisory/ntap-20210423-0007/"
}
],
"sourceIdentifier": "secteam@freebsd.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-415"
},
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…