IM
IronMonkey Threat Research

CVE-2021-41837 HIGH

Published: 2022-02-03 | Last Modified: 2026-08-11 | Status: Modified

Description

An issue was discovered in AhciBusDxe in the kernel 5.0 through 5.5 in Insyde InsydeH2O. Because of an Untrusted Pointer Dereference that causes SMM memory corruption, an attacker may be able to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

Additional Descriptions (1)

Se descubrió un problema en AhciBusDxe en el kernel versión 5.0 hasta la versión 5.5 en InsydeH2O. Debido a una desviación de puntero no fiable que provoca la corrupción de la memoria de SMM, un atacante puede ser capaz de escribir datos fijos o predecibles en SMRAM. La explotación de este problema podría llevar a escalar privilegios a SMM

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-119

Affected Products

Vendor Product Version Update Type
insyde insydeh2o * <built-in method update of dict object at 0x72f03a95e0c0> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f03b04acc0> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f03a95d040> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f0781addc0> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f03a95e4c0> Application
insyde insydeh2o * <built-in method update of dict object at 0x72f0781fe640> Application
siemens simatic_field_pg_m5_firmware * <built-in method update of dict object at 0x72efbdb0a380> Operating System
siemens simatic_field_pg_m6_firmware * <built-in method update of dict object at 0x72f03a95dfc0> Operating System
siemens simatic_ipc127e_firmware * <built-in method update of dict object at 0x72efbdb0bdc0> Operating System
siemens simatic_ipc227g_firmware * <built-in method update of dict object at 0x72f03a95cc80> Operating System
siemens simatic_ipc277g_firmware * <built-in method update of dict object at 0x72effec6f080> Operating System
siemens simatic_ipc327g_firmware * <built-in method update of dict object at 0x72f03a95ee40> Operating System
siemens simatic_ipc377g_firmware * <built-in method update of dict object at 0x72f0582c7dc0> Operating System
siemens simatic_ipc427e_firmware * <built-in method update of dict object at 0x72f05a4ee540> Operating System
siemens simatic_ipc477e_firmware * <built-in method update of dict object at 0x72effedde480> Operating System
siemens simatic_ipc627e_firmware * <built-in method update of dict object at 0x72f059355800> Operating System
siemens simatic_ipc647e_firmware * <built-in method update of dict object at 0x72f03a95cf80> Operating System
siemens simatic_ipc677e_firmware * <built-in method update of dict object at 0x72f03b04b280> Operating System
siemens simatic_ipc847e_firmware * <built-in method update of dict object at 0x72f0781ae740> Operating System
siemens simatic_itp1000_firmware * <built-in method update of dict object at 0x72f05a4ee100> Operating System

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:*:*:*:*:*:*:*:*

Operator: OR

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

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc127e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc227g_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc277g_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc277g:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc327g_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc327g:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc377g_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc377g:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc427e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc427e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc477e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc477e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc627e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc627e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc647e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc647e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc677e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc677e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_ipc847e_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_ipc847e:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:siemens:simatic_itp1000_firmware:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:siemens:simatic_itp1000:-:*:*:*:*:*:*:*

References

Notification
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