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MitreCVE-2021-33626

HistoryOct 01, 2021 - 3:15 a.m.

CVE-2021-33626

2021-10-0103:15:06

CWE-829

mitre

web.nvd.nist.gov

cve-2021-33626

vulnerability

smm

system management mode

swsmi

buffer pointer

commbuffer

smram

arbitrary code execution

nvd

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

Confidence

High

EPSS

0.001

Percentile

20.4%

JSON

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.

Affected configurations

Nvd

Node

insydeinsydeh2oRange5.3–5.34.44

Node

insydeinsydeh2oRange5.2–5.25.44

Node

insydeinsydeh2oRange5.1–5.16.25

Node

insydeinsydeh2oRange5.4–5.42.44

Node

insydeinsydeh2oRange5.3–5.35.25

Node

insydeinsydeh2oRange5.2–5.26.25

Node

insydeinsydeh2oRange5.4–5.43.25

Node

siemensruggedcom_apr1808Match-

AND

siemensruggedcom_apr1808_firmwareMatch-

Node

siemenssimatic_field_pg_m5Match-

AND

siemenssimatic_field_pg_m5_firmwareMatch-

Node

siemenssimatic_field_pg_m6Match-

AND

siemenssimatic_field_pg_m6_firmwareMatch-

Node

siemenssimatic_ipc127eMatch-

AND

siemenssimatic_ipc127e_firmwareMatch-

Node

siemenssimatic_ipc227gMatch-

AND

siemenssimatic_ipc227g_firmwareMatch-

Node

siemenssimatic_ipc277gMatch-

AND

siemenssimatic_ipc277g_firmwareMatch-

Node

siemenssimatic_ipc327g_firmwareMatch-

AND

siemenssimatic_ipc327gMatch-

Node

siemenssimatic_ipc377g_firmwareMatch-

AND

siemenssimatic_ipc377gMatch-

Node

siemenssimatic_ipc427e_firmwareMatch-

AND

siemenssimatic_ipc427eMatch-

Node

siemenssimatic_ipc477e_firmwareMatch-

AND

siemenssimatic_ipc477eMatch-

Node

siemenssimatic_ipc477e_pro_firmwareMatch-

AND

siemenssimatic_ipc477e_proMatch-

Node

siemenssimatic_ipc627e_firmwareMatch-

AND

siemenssimatic_ipc627eMatch-

Node

siemenssimatic_ipc647e_firmwareMatch-

AND

siemenssimatic_ipc647eMatch-

Node

siemenssimatic_ipc677e_firmwareMatch-

AND

siemenssimatic_ipc677eMatch-

Node

siemenssimatic_ipc847e_firmwareMatch-

AND

siemenssimatic_ipc847eMatch-

Node

siemenssimatic_itp1000_firmwareMatch-

AND

siemenssimatic_itp1000Match-

VendorProductVersionCPE
insydeinsydeh2o*cpe:2.3:o:insyde:insydeh2o:*:*:*:*:*:*:*:*
siemensruggedcom_apr1808-cpe:2.3:h:siemens:ruggedcom_apr1808:-:*:*:*:*:*:*:*
siemensruggedcom_apr1808_firmware-cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:*:*:*:*:*:*:*
siemenssimatic_field_pg_m5-cpe:2.3:h:siemens:simatic_field_pg_m5:-:*:*:*:*:*:*:*
siemenssimatic_field_pg_m5_firmware-cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:*
siemenssimatic_field_pg_m6-cpe:2.3:h:siemens:simatic_field_pg_m6:-:*:*:*:*:*:*:*
siemenssimatic_field_pg_m6_firmware-cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:*
siemenssimatic_ipc127e-cpe:2.3:h:siemens:simatic_ipc127e:-:*:*:*:*:*:*:*
siemenssimatic_ipc127e_firmware-cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:*
siemenssimatic_ipc227g-cpe:2.3:h:siemens:simatic_ipc227g:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
insyde	insydeh2o	*	cpe:2.3:o:insyde:insydeh2o::::::::
siemens	ruggedcom_apr1808	-	cpe:2.3:h:siemens:ruggedcom_apr1808:-:::::::*
siemens	ruggedcom_apr1808_firmware	-	cpe:2.3:o:siemens:ruggedcom_apr1808_firmware:-:::::::*
siemens	simatic_field_pg_m5	-	cpe:2.3:h:siemens:simatic_field_pg_m5:-:::::::*
siemens	simatic_field_pg_m5_firmware	-	cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:::::::*
siemens	simatic_field_pg_m6	-	cpe:2.3:h:siemens:simatic_field_pg_m6:-:::::::*
siemens	simatic_field_pg_m6_firmware	-	cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:::::::*
siemens	simatic_ipc127e	-	cpe:2.3:h:siemens:simatic_ipc127e:-:::::::*
siemens	simatic_ipc127e_firmware	-	cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:::::::*
siemens	simatic_ipc227g	-	cpe:2.3:h:siemens:simatic_ipc227g:-:::::::*

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References

cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf

security.netapp.com/advisory/ntap-20220216-0006/

www.insyde.com/security-pledge

www.insyde.com/security-pledge/SA-2021001

CVSS2

4.6

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

Confidence

High

EPSS

0.001

Percentile

20.4%

JSON

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