FKIE_CVE-2016-2126
Vulnerability from fkie_nvd - Published: 2017-05-11 14:29 - Updated: 2026-06-17 00:43
Severity
Summary
Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.
References
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "secalert@redhat.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"matchCriteriaId": "DFC5F77B-9D76-42B9-BB16-CA3A2DD00766",
"versionEndExcluding": "4.3.13",
"versionStartIncluding": "4.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9A963A86-CAF4-4882-B9DC-E9C7CDA2764C",
"versionEndExcluding": "4.4.8",
"versionStartIncluding": "4.4.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"matchCriteriaId": "6044E13A-532E-403E-AA23-4A77771D2094",
"versionEndExcluding": "4.5.3",
"versionStartIncluding": "4.5.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions."
},
{
"lang": "es",
"value": "Samba versiones 4.0.0 hasta 4.5.2, es vulnerable a la elevaci\u00f3n de privilegios debido al manejo incorrecto de la suma de comprobaci\u00f3n PAC (Certificado de Atributo de Privilegio). Un atacante autenticado y remoto puede hacer que el proceso winbindd se bloquee usando un ticket de Kerberos leg\u00edtimo. Un servicio local con acceso a la tuber\u00eda con privilegios de winbindd puede hacer que winbindd almacene en cach\u00e9 los permisos de acceso elevados."
}
],
"id": "CVE-2016-2126",
"lastModified": "2026-06-17T00:43:30.613",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"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": "2017-05-11T14:29:58.077",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0494.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0495.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0662.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0744.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/94994"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1037495"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2017:1265"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://www.samba.org/samba/security/CVE-2016-2126.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0494.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0495.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0662.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://rhn.redhat.com/errata/RHSA-2017-0744.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/94994"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1037495"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2017:1265"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://www.samba.org/samba/security/CVE-2016-2126.html"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-264"
}
],
"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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