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Lenovo disclosed Multi-Vendor BIOS Security Vulnerabilities in September 2022
that affect multiple Lenovo devices. These are high severity vulnerabil - Qualys
Security Blog

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By Lavish Jhamb




Remediate Your Vulnerable Lenovo Systems with Qualys Custom Assessment and
Remediation



Posted in on September 28, 2022



Lenovo disclosed Multi-Vendor BIOS Security Vulnerabilities in September 2022
that affect multiple Lenovo devices. These are high severity vulnerabilities
that have the potential of resulting in information disclosure, privilege
escalation, and denial of service. Here are the related CVEs:  

 * CVE-2021-28216 – Tianocore reported a fixed pointer vulnerability in
   TianoCore EDK II BIOS that may allow an attacker with local access and
   elevated privileges to execute arbitrary code  

 * CVE-2022-40137 – A buffer overflow in the WMI SMI Handler in some Lenovo
   models may allow an attacker with local access and elevated privileges to
   execute arbitrary code  
 * CVE-2022-40134 – An information leak vulnerability in the SMI Set BIOS
   Password SMI Handler in some Lenovo models may allow an attacker with local
   access and elevated privileges to read SMM memory 
 * CVE-2022-40135 – An information leak vulnerability in the Smart USB
   Protection SMI Handler in some Lenovo models may allow an attacker with local
   access and elevated privileges to read SMM memory
 * CVE-2022-40136 – An information leak vulnerability in SMI Handler used to
   configure platform settings over WMI in some Lenovo models may allow an
   attacker with local access and elevated privileges to read SMM memory  

As part of its remediation efforts, Lenovo has fixed these issues with the
latest BIOS updates for impacted devices. Please refer to: Lenovo System Update
for Windows 11, 10 & 7 (32-bit, 64-bit) – Desktop, Notebook, Workstation.


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