Status Final for InsydeH20 Vulnerability in NetApp Products CVE-2021-33627

NetApp, Inc. had published a security advisory concerning certain InsydeH20 versions are susceptible to a vulnerability in SMM (System Management Mode) branch that registers a SWSMI handler.

Advisory ID: NTAP-20220222-0002
Version: 4.0
Last updated: 01/17/2023
Status: Final.
CVEs: CVE-2021-33627

Summary
Multiple NetApp products incorporate InsydeH20. Certain InsydeH20 versions are susceptible to a vulnerability in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(CommBuffer) and could lead to memory corruption in SMRAM or arbitrary code execution.

Impact
Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS).

Vulnerability scoring details

CVE	Score	Vector
CVE-2021-33627	8.2 (HIGH)	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploitation and public announcements
NetApp is aware of public discussion of this vulnerability.

References: https://www.insyde.com/security-pledge/SA-2022022

Affected products
FAS/AFF BIOS – A300/8200/A200/2650/2620/C190/A220/2720/2750

Remediation
Software versions and fixes
NetApp’s currently available patches are listed below.

Product	First fixed in release
FAS/AFF BIOS – A300/8200/A200/2650/2620/C190/A220/2720/2750	https://mysupport.netapp.com/site/downloads/firmware/system-firmware-diagnostics/download/SYSTEM/30804120_signed/308-04120_A0_SERVICE_IMAGE_11.18_S.zip

Workarounds: None at this time.

Obtaining software fixes
Software fixes will be made available through the NetApp Support website in the Software Download section.

Customers who do not have access to the Support website should contact Technical Support at the number below to obtain the patches.

Contact information:
Check http://mysupport.netapp.com for further updates.

For questions, contact NetApp at: Technical support
mysupport.netapp.com
1 888 4 NETAPP (1 888 463 8277) (U.S. and Canada)
+00 800 44 638277 (EMEA/Europe)
+800 800 80 800 (AsiaPac)

Revision history:

Status of notice: Final

This advisory should be considered the single source of current, up-to-date, authorized and accurate information from NetApp regarding Full Support products and versions.

This advisory is posted at the following link:
https://security.netapp.com/advisory/NTAP-20220222-0002

Revision history

Revision #	Date	Comments
1.0	20220222	Initial public release
2.0	20220311	FAS/AFF BIOS moved to Affected Products
3.0	20220315	Affected FAS/AFF BIOS platforms added to Impact
4.0	20230117	Affected FAS/AFF BIOS platforms removed from Impact, FAS/AFF BIOS – A300/8200/A200/2650/2620/C190/A220/2720/2750 moved to Affected Products and added to Software Versions and Fixes, Final status

This document is provided solely for informational purposes. All information is based upon NetApp’s current knowledge and understanding of the hardware and software products tested by NetApp, and the methodology and assumptions used by NetApp. NetApp is not responsible for any errors or omissions that may be contained herein, and no warranty, representation, or other legal commitment or obligation is being provided by NetApp. 2022 NetApp, Inc.