CVE-2021-33626

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

CVSS v3 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf	Third Party Advisory
https://security.netapp.com/advisory/ntap-20220216-0006/	Third Party Advisory
https://www.insyde.com/security-pledge	Vendor Advisory
https://www.insyde.com/security-pledge/SA-2021001	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 4 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 5 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 6 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 7 (hide)

cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*

Configuration 8 (hide)

AND

cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:siemens:ruggedcom_apr1808:-:*:*:*:*:*:*:*

Configuration 9 (hide)

AND

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

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

Configuration 10 (hide)

AND

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

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

Configuration 11 (hide)

AND

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

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

Configuration 12 (hide)

AND

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

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

Configuration 13 (hide)

AND

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

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

Configuration 14 (hide)

AND

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

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

Configuration 15 (hide)

AND

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

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

Configuration 16 (hide)

AND

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

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

Configuration 17 (hide)

AND

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

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

Configuration 18 (hide)

AND

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

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

Configuration 19 (hide)

AND

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

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

Configuration 20 (hide)

AND

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

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

Configuration 21 (hide)

AND

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

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

Configuration 22 (hide)

AND

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

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

Configuration 23 (hide)

AND

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

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

History

24 Apr 2022, 02:03

Type	Values Removed	Values Added
CPE		cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc847e:-:::::::* cpe:2.3:h:siemens:simatic_field_pg_m5:-:::::::* cpe:2.3:h:siemens:ruggedcom_apr1808:-:::::::* cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:::::::* cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc277g:-:::::::* cpe:2.3:h:siemens:simatic_itp1000:-:::::::* cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:::::::* cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc427e:-:::::::* cpe:2.3:h:siemens:simatic_field_pg_m6:-:::::::* cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:::::::* cpe:2.3:o:siemens:simatic_itp1000_firmware:-:::::::* cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:::::::* cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc647e:-:::::::* cpe:2.3:h:siemens:simatic_ipc327g:-:::::::* cpe:2.3:h:siemens:simatic_ipc627e:-:::::::* cpe:2.3:h:siemens:simatic_ipc477e_pro:-:::::::* cpe:2.3:h:siemens:simatic_ipc127e:-:::::::* cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:::::::* cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:::::::* cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc477e:-:::::::* cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc677e:-:::::::* cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:::::::* cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:::::::* cpe:2.3:h:siemens:simatic_ipc227g:-:::::::* cpe:2.3:h:siemens:simatic_ipc377g:-:::::::* cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:::::::*
References	~~(CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf -~~	(CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf - Third Party Advisory
References	~~(MISC) https://www.insyde.com/security-pledge -~~	(MISC) https://www.insyde.com/security-pledge - Vendor Advisory
References	~~(CONFIRM) https://security.netapp.com/advisory/ntap-20220216-0006/ -~~	(CONFIRM) https://security.netapp.com/advisory/ntap-20220216-0006/ - Third Party Advisory
First Time		Siemens simatic Ipc627e Firmware Siemens Siemens ruggedcom Apr1808 Siemens simatic Ipc377g Firmware Siemens simatic Ipc127e Firmware Siemens simatic Ipc277g Siemens simatic Ipc277g Firmware Siemens simatic Ipc327g Firmware Siemens simatic Ipc477e Firmware Siemens simatic Ipc847e Firmware Siemens simatic Itp1000 Siemens simatic Ipc227g Firmware Siemens simatic Field Pg M5 Firmware Siemens simatic Ipc427e Siemens simatic Field Pg M5 Siemens simatic Ipc677e Firmware Siemens simatic Ipc647e Firmware Siemens simatic Ipc327g Siemens simatic Ipc627e Siemens simatic Ipc677e Siemens simatic Ipc847e Siemens simatic Ipc477e Pro Siemens simatic Ipc427e Firmware Siemens simatic Ipc377g Siemens simatic Field Pg M6 Firmware Siemens simatic Ipc127e Siemens simatic Ipc477e Siemens simatic Ipc647e Siemens simatic Field Pg M6 Siemens simatic Ipc477e Pro Firmware Siemens ruggedcom Apr1808 Firmware Siemens simatic Ipc227g Siemens simatic Itp1000 Firmware

24 Feb 2022, 15:15

Type	Values Removed	Values Added
References		(CONFIRM) https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf -

17 Feb 2022, 01:15

Type	Values Removed	Values Added
References		(CONFIRM) https://security.netapp.com/advisory/ntap-20220216-0006/ -

03 Feb 2022, 00:15

Type	Values Removed	Values Added
References		(MISC) https://www.insyde.com/security-pledge -
Summary	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 PnpSmm, SmmResourceCheckDxe, and BeepStatusCode drivers are 05.08.23, 05.16.23, 05.26.23, 05.35.23, 05.43.23, and 05.51.23 (for Kernel 5.0 through 5.5).	A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

15 Oct 2021, 15:13

Type	Values Removed	Values Added
CWE		CWE-829
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 4.6 v3 : 7.8
CPE		cpe:2.3:o:insyde:insydeh2o::::::::
References	~~(MISC) https://www.insyde.com/security-pledge/SA-2021001 -~~	(MISC) https://www.insyde.com/security-pledge/SA-2021001 - Vendor Advisory

01 Oct 2021, 03:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-10-01 03:15

Updated : 2023-12-10 14:09

NVD link : CVE-2021-33626

Mitre link : CVE-2021-33626

CVE.ORG link : CVE-2021-33626

JSON object : View

Products Affected

siemens

insyde

insydeh2o

CWE

CWE-829

Inclusion of Functionality from Untrusted Control Sphere

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