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

3.2LOW

Key Information:

Vendor
AMD
Status
3rd Gen AMD EPYC™ Processors
4th Gen AMD EPYC™ Processors
Vendor
CVE Published:
11 January 2024

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A vulnerability exists wherein a privileged attacker can interfere with the delivery of debug exceptions to Secure Encrypted Virtualization (SEV) with Secure Nested Paging (SNP) guests. This action may prevent these guests from receiving the necessary debug information, potentially affecting overall system performance and security monitoring. The flaw raises significant concerns regarding the integrity and reliability of debugging processes within affected environments.

Affected Version(s)

3rd Gen AMD EPYC™ Processors x86 various

4th Gen AMD EPYC™ Processors x86 Various

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

cve-2023-20573-poc
Created by Freax13

References

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

CVSS V3.1

Score:
3.2
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre Database1 Proof of Concept(s)
.