Denial of Service Vulnerability in AMD Secure Processor Bootloader
CVE-2021-46755

7.5HIGH

Key Information:

Vendor

Amd
Status
Ryzen™ 3000 Series Desktop Processors “matisse” Am4
Amd Ryzen™ 5000 Series Desktop Processors “vermeer” Am4
Ryzen™ 5000 Series Desktop Processor With Radeon™ Graphics “cezanne” Am4
3rd Gen Amd Ryzen™ Threadripper™ Processors “castle Peak” Hedt
Vendor
CVE Published:
9 May 2023

What is CVE-2021-46755?

A flaw in the ASP bootloader within the AMD Secure Processor arises from improper handling of SysHub mappings during error processing. If exploited by an attacker with a malicious bootloader, this vulnerability could lead to the exhaustion of SysHub resources, potentially resulting in service disruptions and denial of service conditions.

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Affected Version(s)

3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT x86 various

AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4 x86 various

Ryzen™ 3000 Series Desktop Processors “Matisse” AM4 x86 various

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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