CVE-2020-27339 (GCVE-0-2020-27339)
Vulnerability from cvelistv5 – Published: 2021-06-16 15:49 – Updated: 2026-08-11 12:22
VLAI
EPSS
VEX
Summary
In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).
Severity
6.7 (Medium)
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://www.insyde.com/security-pledge/SA-2021001 | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2022021… | x_refsource_CONFIRM |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://www.kb.cert.org/vuls/id/796611 | |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
18 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | RUGGEDCOM APE1808 - BIOS |
Affected:
0 , < V1.0.202N
(custom)
|
|
| Siemens | SIMATIC Field PG M5 |
Affected:
0 , < V22.01.10
(custom)
|
|
| Siemens | SIMATIC Field PG M6 |
Affected:
0 , < V26.01.13
(custom)
|
|
| Siemens | SIMATIC IPC127E |
Affected:
0 , < V27.01.09
(custom)
|
|
| Siemens | SIMATIC IPC227G |
Affected:
0 , < V28.01.04
(custom)
|
|
| Siemens | SIMATIC IPC277G |
Affected:
0 , < V28.01.04
(custom)
|
|
| Siemens | SIMATIC IPC277G PRO |
Affected:
0 , < V28.01.04
(custom)
|
|
| Siemens | SIMATIC IPC327G |
Affected:
0 , < V28.01.04
(custom)
|
|
| Siemens | SIMATIC IPC377G |
Affected:
0 , < V28.01.04
(custom)
|
|
| Siemens | SIMATIC IPC427E |
Affected:
0 , < V21.01.17
(custom)
|
|
| Siemens | SIMATIC IPC477E |
Affected:
0 , < V21.01.17
(custom)
|
|
| Siemens | SIMATIC IPC477E PRO |
Affected:
0 , < V21.01.17
(custom)
|
|
| Siemens | SIMATIC IPC627E |
Affected:
0 , < V25.02.12
(custom)
|
|
| Siemens | SIMATIC IPC647E |
Affected:
0 , < V25.02.12
(custom)
|
|
| Siemens | SIMATIC IPC677E |
Affected:
0 , < V25.02.12
(custom)
|
|
| Siemens | SIMATIC IPC847E |
Affected:
0 , < V25.02.12
(custom)
|
|
| Siemens | SIMATIC ITP1000 |
Affected:
0 , < V23.01.10
(custom)
|
|
| Siemens | SIPLUS IPC427E |
Affected:
0 , < V21.01.17
(custom)
|
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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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