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CVE-2023-20573— Debug Exception Delivery in Secure Nested Paging

Quick assessment

Affected
AMD 3rd Gen AMD EPYC™ Processors
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AMD EPYC是美国超威半导体（AMD）公司的一款x86架构服务器微处理器产品线，中文名为“霄龙”，采用Zen微架构。 AMD EPYC 第3代和第4代存在安全漏洞，该漏洞源于允许特权攻击者阻止向SEV-SNP客户机传递调试异常，导致客户机无法收到预期的调试信息。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.29% · P19

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-20573

Vulnerability Information
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Vulnerability Title
Debug Exception Delivery in Secure Nested Paging
Source: CVE Program / CVE List V5
Vulnerability Description
A privileged attacker can prevent delivery of debug exceptions to SEV-SNP guests potentially resulting in guests not receiving expected debug information.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
AMD EPYC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AMD EPYC是美国超威半导体（AMD）公司的一款x86架构服务器微处理器产品线，中文名为“霄龙”，采用Zen微架构。 AMD EPYC 第3代和第4代存在安全漏洞，该漏洞源于允许特权攻击者阻止向SEV-SNP客户机传递调试异常，导致客户机无法收到预期的调试信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AMD 3rd Gen AMD EPYC™ Processors various -
AMD 4th Gen AMD EPYC™ Processors Various -

II. Public POCs for CVE-2023-20573

# POC Description Source Link Shenlong Link
1 None https://github.com/Freax13/cve-2023-20573-poc POC Details
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III. Intelligence Information for CVE-2023-20573

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Other References for CVE-2023-20573 (1)

IV. Related Vulnerabilities

Same product: 3rd Gen AMD EPYC™ Processors
Same vendor: AMD

V. Comments for CVE-2023-20573

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