CVE-2021-46143
Estado: ModificadaAlta (7.8)—
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 3.79%
- Percentil entre todas las CVEs puntuadas: 90
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (8)
CWE
- CWE-190
- CWE-190
Referencias
- http://www.openwall.com/lists/oss-security/2022/01/17/3
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
- https://github.com/libexpat/libexpat/issues/532
- https://github.com/libexpat/libexpat/pull/538
- https://security.gentoo.org/glsa/202209-24
- https://security.netapp.com/advisory/ntap-20220121-0006/
- https://www.debian.org/security/2022/dsa-5073
- https://www.tenable.com/security/tns-2022-05
- http://www.openwall.com/lists/oss-security/2022/01/17/3
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
- https://github.com/libexpat/libexpat/issues/532
- https://github.com/libexpat/libexpat/pull/538
- https://security.gentoo.org/glsa/202209-24
- https://security.netapp.com/advisory/ntap-20220121-0006/
- https://www.debian.org/security/2022/dsa-5073
- https://www.tenable.com/security/tns-2022-05
JSON original (NVD)
Mostrar
{
"id": "CVE-2021-46143",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-46143",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-04-23T13:17:07.341792Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 6.8,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "MEDIUM",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 8.6,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": true
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "cve@mitre.org",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.1,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.2
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2022-01-06T04:15:07.017",
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2022/01/17/3",
"tags": [
"Mailing List",
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://github.com/libexpat/libexpat/issues/532",
"tags": [
"Exploit",
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://github.com/libexpat/libexpat/pull/538",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://security.gentoo.org/glsa/202209-24",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://security.netapp.com/advisory/ntap-20220121-0006/",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.debian.org/security/2022/dsa-5073",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.tenable.com/security/tns-2022-05",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.openwall.com/lists/oss-security/2022/01/17/3",
"tags": [
"Mailing List",
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://github.com/libexpat/libexpat/issues/532",
"tags": [
"Exploit",
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://github.com/libexpat/libexpat/pull/538",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.gentoo.org/glsa/202209-24",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.netapp.com/advisory/ntap-20220121-0006/",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.debian.org/security/2022/dsa-5073",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.tenable.com/security/tns-2022-05",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-190"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-190"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize."
},
{
"lang": "es",
"value": "En la función doProlog en el archivo xmlparse.c en Expat (también se conoce como libexpat) versiones anteriores a 2.4.3, se presenta un desbordamiento de enteros para m_groupSize."
}
],
"lastModified": "2026-06-17T04:14:34.540",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7A2FBF20-7B2C-49FF-83F8-1EF903078751",
"versionEndExcluding": "2.4.3"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*",
"vulnerable": true,
"matchCriteriaId": "3A756737-1CC4-42C2-A4DF-E1C893B4E2D5"
},
{
"criteria": "cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1FE996B1-6951-4F85-AA58-B99A379D2163"
},
{
"criteria": "cpe:2.3:a:netapp:hci_baseboard_management_controller:h610c:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "78BE572F-45C1-467F-918F-FB1276F6B495"
},
{
"criteria": "cpe:2.3:a:netapp:hci_baseboard_management_controller:h610s:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DE7C6010-F736-4BDA-9E3B-C4370BBFA149"
},
{
"criteria": "cpe:2.3:a:netapp:hci_baseboard_management_controller:h615c:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "646FFC2B-6DC4-4BD8-AAE0-81895D397700"
},
{
"criteria": "cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5735E553-9731-4AAC-BCFF-989377F817B3"
},
{
"criteria": "cpe:2.3:a:netapp:solidfire_\\&_hci_management_node:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D6D700C5-F67F-4FFB-BE69-D524592A3D2E"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C42F5145-1F37-40E2-AD83-495F7012BC3D",
"versionEndExcluding": "8.15.3"
},
{
"criteria": "cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "112367D4-EF51-4050-834C-7E887A5C52D9",
"versionEndExcluding": "10.1.1",
"versionStartIncluding": "10.0.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "98CC9C9A-FE14-4D50-A8EC-C309229356C8",
"versionEndExcluding": "3.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}