Guest Integrity at Risk Due to Code Bug in Secure TSC
CVE-2023-31347

4.9MEDIUM

Key Information:

Vendor

Amd
Status
3rd Gen Amd Epyc™ Processors
4th Gen Amd Epyc™ Processors
Vendor
CVE Published:
13 February 2024

What is CVE-2023-31347?

A code bug present in the SEV firmware related to the Secure TSC function has been identified, allowing an attacker with elevated privileges to influence the Time Stamp Counter (TSC) perceived by guests when Secure TSC is enabled. This manipulation could lead to a compromised state of guest integrity, potentially impacting the stability and reliability of the virtualized environment.

Affected Version(s)

3rd Gen AMD EPYC™ Processors x86 various

4th Gen AMD EPYC™ Processors x86 various

References

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

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2023-31347 : Guest Integrity at Risk Due to Code Bug in Secure TSC