Information disclosure in AMD products - CVE-2020-12966

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Main Vulnerability Database Vulnerabilities #VU65122

Information disclosure in AMD products - CVE-2020-12966

Published: July 12, 2022


Vulnerability identifier: #VU65122
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-12966
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: AMD
Affected software:
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
AMD EPYC Embedded Processors

Detailed vulnerability description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to a Ciphertext side channel attack on ECC and DH operations in the Secure Encrypted Virtualization with Encrypted State (SEV-ES) and Secure Encrypted Virtualization with Secure Nested Paging (SEV-SNP). A local user with control over hypervisor can obtain sensitive data from the guest OS.


How to mitigate CVE-2020-12966

Install updates from vendor's website.

Sources