Virtual Machine (VM) Integrity Bypass through IOMMU Misconfiguration

CVE-2023-20584

Summary

The vulnerability arises from the way the IOMMU processes specific address ranges that contain invalid device table entries (DTEs). An attacker with the appropriate privileges, who has the ability to compromise a hypervisor, may exploit this flaw to generate DTE errors. Such errors can potentially allow the attacker to circumvent RMP (Reverse Memory Protection) checks within the SEV-SNP (Secure Encrypted Virtualization - Secure Nested Paging) environment. This may ultimately lead to a compromise of guest integrity, posing significant risks to virtualized environments relying on AMD's technology.

References