SB2021051703 - Multiple vulnerabilities in AMD products

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Code Injection (CVE-ID: CVE-2020-12967)

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to the lack of nested page table protection in the AMD SEV/SEV-ES feature. A remote administrator can execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Code Injection (CVE-ID: CVE-2021-26311)

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to the memory can be rearranged in the guest address space that is not detected by the attestation mechanism in the AMD SEV/SEV-ES feature. A remote administrator can execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1004