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[email protected]CVE-2021-33626

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

CVE-2021-33626

2021-10-0103:15:06

CWE-829

[email protected]

web.nvd.nist.gov

cve-2021-33626

vulnerability

smm

system management mode

swsmi

buffer pointer

commbuffer

smram

arbitrary code execution

nvd

4.6 Medium

CVSS2

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

7.8 High

CVSS3

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

8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

20.6%

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-

CPENameOperatorVersion
insyde:insydeh2oinsyde insydeh2olt5.34.44

CPE	Name	Operator	Version
insyde:insydeh2o	insyde insydeh2o	lt	5.34.44

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

4.6 Medium

CVSS2

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

7.8 High

CVSS3

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

8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

20.6%

JSON

Related for CVE-2021-33626

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