IM
IronMonkey Threat Research

CVE-2021-45971 HIGH

Published: 2022-01-06 | Last Modified: 2026-08-11 | Status: Modified

Description

An issue was discovered in SdHostDriver 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 (CommBufferData).

Additional Descriptions (1)

Se ha detectado un problema en SdHostDriver en Insyde 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 búfer asignado (CommBufferData).

CVSS Metrics

Base Score: 8.2 (HIGH)

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredHIGH
User InteractionNONE
ScopeCHANGED
Confidentiality ImpactHIGH
Integrity ImpactHIGH
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.5

Impact Score: 6.0

Base Score: 7.2 (HIGH)

AV:L/AC:L/Au:N/C:C/I:C/A:C

Access VectorLOCAL
Access ComplexityLOW
AuthenticationNONE
Confidentiality ImpactCOMPLETE
Integrity ImpactCOMPLETE
Availability ImpactCOMPLETE

Source: [email protected]

Type: Primary

Exploitability Score: 3.9

Impact Score: 10.0

Weaknesses

Source Type Description
[email protected] Primary
en CWE-787

Affected Products

Vendor Product Version Update Type
insyde insydeh2o * <built-in method update of dict object at 0x72efbe6b2880> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f03a95ddc0> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f05829c280> Application
insyde insydeh2o * <built-in method update of dict object at 0x72effec6e140> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f07831b9c0> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

References

Notification
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