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Authentication Bypass Vulnerabilities in FPC2 and SMM Firmware

Authentication Bypass Vulnerabilities in FPC2 and SMM Firmware

Authentication Bypass Vulnerabilities in FPC2 and SMM Firmware

Lenovo Security Advisory: LEN-72615

Potential Impact: Authentication bypass

Severity: High

Scope of Impact: Lenovo-specific

CVE Identifier: CVE-2021-3849, CVE-2021-3897

 

Summary Description:

The following vulnerabilities were discovered during an internal security review.

CVE-2021-3849: An authentication bypass vulnerability was discovered in the web interface of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware that could allow an unauthenticated attacker to execute commands on the SMM and FPC2.  SMM2 is not affected.

CVE-2021-3897: An authentication bypass vulnerability was discovered in an internal service of the Lenovo Fan Power Controller2 (FPC2) and Lenovo System Management Module (SMM) firmware during an that could allow an unauthenticated attacker to execute commands on the SMM and FPC2.  SMM2 is not affected.

 

Mitigation Strategy for Customers (what you should do to protect yourself):

Upgrade to the firmware version (or newer) indicated for your model in the Product Impact section below.

 

Product Impact:

To download the version specified for your product below, follow these steps:

Navigate to the Drivers & Software support site for your product:

  1. Search for your product by name or machine type.
  2. Click Drivers & Software on the left menu panel.
  3. Click on Manual Update to browse by Component type.
  4. Compare the minimum fix version for your product from the applicable product table below with the latest version posted on the support site.

Lenovo also offers tools to assist with update management as an alternative to the manual steps described above. Refer to the following for additional help:

PC Products and Software: https://support.lenovo.com/us/en/solutions/ht504759

Server and Enterprise Software: https://support.lenovo.com/us/en/solutions/lnvo-lxcaupd and https://datacentersupport.lenovo.com/us/en/documents/lnvo-center

 

Click below links to view affected products:

System x

ThinkAgile

ThinkSystem

  

References:

https://www.ibm.com/support/pages/fan-power-controller-fpc-firmware-update-v360-ibm-system-x

 

Revision History:

Revision Date Description
1 2021-12-14 Initial release

For a complete list of all Lenovo Product Security Advisories, click here.

For the most up to date information, please remain current with updates and advisories from Lenovo regarding your equipment and software. The information provided in this advisory is provided on an “as is” basis without any warranty or guarantee of any kind. Lenovo reserves the right to change or update this advisory at any time.

 

Product Impact:

System x

Product Component Minimum Fixed Version
Enclosure - n1200 Enclosure (NeXtScale) Lenovo Fan Power Controller2 (FPC2) (For AnyOS) FHET50B-2.90
Enclosure - n1200 water-cooled Enclosure (NeXtScale) Lenovo Fan Power Controller2 (FPC2) (For AnyOS) FHET50B-2.90
IBM NeXtScale Fan Power Controller (FPC) IBM NeXtScale Fan Power Controller2 (FPC2) 44A-3.70

 

ThinkAgile

Product Component Minimum Fixed Version
HX Enclosure Certified Node (ThinkAgile) Lenovo System Management Module Firmware v1.22 [TESM30D] (For AnyOS) TESM28B-1.21
VX Enclosure (ThinkAgile) Lenovo System Management Module Firmware v1.22 [TESM30D] (For AnyOS) TESM28B-1.21

 

ThinkSystem

Product Component Minimum Fixed Version
D2 Enclosure (ThinkSystem) Lenovo System Management Module Firmware v1.22 [TESM30D] (For AnyOS) TESM28B-1.21

Alias Id:LEN-72615
Document ID:PS500458
Original Publish Date:12/14/2021
Last Modified Date:12/14/2021