Description
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).
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- insyde / insydeh2o5.3 – 5.34.44
- Siemens / ruggedcom_apr1808_firmware
- Siemens / simatic_field_pg_m5_firmware
- Siemens / simatic_field_pg_m6_firmware
- Siemens / simatic_ipc127e_firmware
- Siemens / simatic_ipc227g_firmware
- Siemens / simatic_ipc277g_firmware
- Siemens / simatic_ipc327g_firmware
- Siemens / simatic_ipc377g_firmware
- Siemens / simatic_ipc427e_firmware
- Siemens / simatic_ipc477e_firmware
- Siemens / simatic_ipc477e_pro_firmware
- Siemens / simatic_ipc627e_firmware
- Siemens / simatic_ipc647e_firmware
- Siemens / simatic_ipc677e_firmware
- Siemens / simatic_ipc847e_firmware
- Siemens / simatic_itp1000_firmware
Updated 8m ago · 8 sources