FKIE_CVE-2021-45970
Vulnerability from fkie_nvd - Published: 2022-01-05 23:15 - Updated: 2026-08-11 13:17
Severity
Summary
An issue was discovered in IdeBusDxe in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (the status code saved at the CommBuffer+4 location).
References
{
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"vendor": "Siemens",
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"lessThan": "V21.01.17",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC IPC477E",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V21.01.17",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
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"product": "SIMATIC IPC477E PRO",
"vendor": "Siemens",
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"version": "0",
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}
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},
{
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"product": "SIMATIC IPC627E",
"vendor": "Siemens",
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"version": "0",
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}
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},
{
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"product": "SIMATIC IPC647E",
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"version": "0",
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},
{
"defaultStatus": "unknown",
"product": "SIMATIC IPC677E",
"vendor": "Siemens",
"versions": [
{
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"status": "affected",
"version": "0",
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}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC IPC847E",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V25.02.12",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unknown",
"product": "SIMATIC ITP1000",
"vendor": "Siemens",
"versions": [
{
"lessThan": "V23.01.10",
"status": "affected",
"version": "0",
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}
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},
{
"defaultStatus": "unknown",
"product": "SIPLUS IPC427E",
"vendor": "Siemens",
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"version": "0",
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}
]
}
],
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
}
],
"configurations": [
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"matchCriteriaId": "A6D01558-E38E-4A46-94A7-6F43BECA2599",
"versionEndExcluding": "5.16.25",
"versionStartIncluding": "5.1",
"vulnerable": true
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"versionEndExcluding": "5.26.25",
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An issue was discovered in IdeBusDxe in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (the status code saved at the CommBuffer+4 location)."
},
{
"lang": "es",
"value": "Se ha detectado un problema en IdeBusDxe en InsydeH2O con el kernel 5.1 anteriores a 05.16.25, 5.2 anteriores a 05.26.25, 5.3 anteriores a 05.35.25, 5.4 anteriores a 05.43.25 y 5.5 anteriores a 05.51.25. Se presenta una vulnerabilidad en la rama SMM (System Management Mode) que registra un manejador SWSMI que no comprueba ni valida suficientemente el puntero del buffer asignado (el c\u00f3digo de estado guardado en la ubicaci\u00f3n CommBuffer+4)."
}
],
"id": "CVE-2021-45970",
"lastModified": "2026-08-11T13:17:22.860",
"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,
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"source": "nvd@nist.gov",
"type": "Primary",
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}
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"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.5,
"impactScore": 6.0,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-01-05T23:15:08.887",
"references": [
{
"source": "cve@mitre.org",
"tags": [
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],
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"vulnStatus": "Modified",
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"source": "nvd@nist.gov",
"type": "Primary"
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]
}
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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.
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.
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