Privilege Escalation Vulnerability in AMD SMM Handler
CVE-2023-20558

8.8HIGH

Key Information:

Vendor

Amd
Status
Ryzen™ 2000 Series
Ryzen™ 3000 Series
Ryzen™ 4000 Series
Ryzen™ 5000 Series
Vendor
CVE Published:
2 April 2023

What is CVE-2023-20558?

The vulnerability arises from insufficient control flow management within the AmdCpmOemSmm module, which may enable a malicious actor with elevated privileges to manipulate the System Management Mode (SMM) handler. This situation poses a serious risk as it could lead to unauthorized escalation of privileges, potentially impacting the integrity and confidentiality of the affected systems.

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Affected Version(s)

Ryzen™ Threadripper™ PRO Processor x86 various

2nd Gen AMD Ryzen™ Threadripper™ Processor x86 Various

3rd Gen AMD Ryzen™ Threadripper™ Processors x86 various

References

https://www.amd.com/en/resources/product-security/bulleti...
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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