Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2020-27339

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
16/06/2021
Last modified:
04/11/2025

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).

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.70 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
6.70
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
7.20
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.3 (including) 5.34.44 (excluding)
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.2 (including) 5.25.44 (excluding)
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.1 (including) 5.16.25 (excluding)
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.4 (including) 5.42.44 (excluding)
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.3 (including) 5.35.25 (excluding)
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.2 (including) 5.26.25 (excluding)
cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:* 5.4 (including) 5.43.25 (excluding)
cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:ruggedcom_apr1808:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools