CVE-2021-33625 - Vulnerability Details - OpenCVE

An issue was discovered in Kernel 5.x in Insyde InsydeH2O, affecting HddPassword. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Medium

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.00063.

Key SSVC decision points have not yet been added.

Vendors	Products
Insyde Subscribe	Insydeh2o Subscribe
Netapp Subscribe	Fas\/aff Bios Subscribe
Siemens Subscribe	Ruggedcom Ape1808 Subscribe Ruggedcom Ape1808 Firmware Subscribe Simatic Field Pg M5 Subscribe Simatic Field Pg M5 Firmware Subscribe Simatic Field Pg M6 Subscribe Simatic Field Pg M6 Firmware Subscribe Simatic Ipc127e Subscribe Simatic Ipc127e Firmware Subscribe Simatic Ipc227g Subscribe Simatic Ipc227g Firmware Subscribe Simatic Ipc277g Subscribe Simatic Ipc277g Firmware Subscribe Simatic Ipc327g Subscribe Simatic Ipc327g Firmware Subscribe Simatic Ipc377g Subscribe Simatic Ipc377g Firmware Subscribe Simatic Ipc427e Subscribe Simatic Ipc427e Firmware Subscribe Simatic Ipc477e Subscribe Simatic Ipc477e Firmware Subscribe Simatic Ipc477e Pro Subscribe Simatic Ipc477e Pro Firmware Subscribe Simatic Ipc627e Subscribe Simatic Ipc627e Firmware Subscribe Simatic Ipc647e Subscribe Simatic Ipc647e Firmware Subscribe Simatic Ipc677e Subscribe Simatic Ipc677e Firmware Subscribe Simatic Ipc847e Subscribe Simatic Ipc847e Firmware Subscribe Simatic Itp1000 Subscribe Simatic Itp1000 Firmware Subscribe

Configuration 1 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 3 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 4 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 5 [-]

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 6 [-]

cpe:2.3:o:netapp:fas\/aff_bios:-:*:*:*:*:*:*:*

Configuration 7 [-]

AND

cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:*

Configuration 8 [-]

AND

cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:*

Configuration 9 [-]

AND

cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:*

Configuration 10 [-]

AND

cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:*

Configuration 11 [-]

AND

cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:*

Configuration 12 [-]

AND

cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:*

Configuration 13 [-]

AND

cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:*

Configuration 14 [-]

AND

cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:*

Configuration 15 [-]

AND

cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:*

Configuration 16 [-]

AND

cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:*

Configuration 17 [-]

AND

cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc477e_pro:-:*:*:*:*:*:*:*

Configuration 18 [-]

AND

cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:*

Configuration 19 [-]

AND

cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:*

Configuration 20 [-]

AND

cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:*

Configuration 21 [-]

AND

cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:*

Configuration 22 [-]

AND

cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2021-20302	An issue was discovered in Kernel 5.x in Insyde InsydeH2O, affecting HddPassword. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
https://security.netapp.com/advisory/ntap-20220222-0004/
https://www.insyde.com/security-pledge
https://www.insyde.com/security-pledge/SA-2022014
https://www.kb.cert.org/vuls/id/796611

History

Tue, 04 Nov 2025 20:30:00 +0000

Type	Values Removed	Values Added
References		https://www.kb.cert.org/vuls/id/796611

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2022-02-03T01:55:10.000Z

Updated: 2025-11-04T19:12:29.871Z

Reserved: 2021-05-28T00:00:00.000Z

Link: CVE-2021-33625

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-02-03T02:15:06.930

Modified: 2025-11-04T20:16:00.210

Link: CVE-2021-33625

Redhat

No data.

OpenCVE Enrichment

No data.

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Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses."}, {"lang": "es", "value": "Se ha descubierto un problema en el Kernel versi\u00f3n 5.x de InsydeH2O, que afecta a HddPassword. Los servicios SMI de software que utilizan la funci\u00f3n Communicate() del EFI_SMM_COMMUNICATION_PROTOCOL no comprueban si la direcci\u00f3n del b\u00fafer es v\u00e1lida, lo que permite el uso de direcciones de SMRAM, MMIO o del n\u00facleo del SO"}], "id": "CVE-2021-33625", "lastModified": "2025-11-04T20:16:00.210", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 6.9, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.4, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-02-03T02:15:06.930", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20220222-0004/"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge/SA-2022014"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20220222-0004/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.insyde.com/security-pledge/SA-2022014"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/796611"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}