PT-2021-16998 · Amd · Amd Sev/Sev-Es

Florian Sieck + 3 · Published 2021-05-13 · Updated 2021-05-25 · CVE-2021-26311

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions AMD SEV/SEV-ES feature (affected versions not specified)

Description The issue concerns the AMD SEV/SEV-ES feature, where memory can be rearranged in the guest address space without being detected by the attestation mechanism. This could potentially be exploited by a malicious hypervisor to achieve arbitrary code execution within the guest VM, provided a malicious administrator has access to compromise the server hypervisor.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Command Injection

Weakness Enumeration

CWE-77

Related Identifiers

CVE-2021-26311

Affected Products

Amd Sev/Sev-Es

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-26311 · Security Note
• https://amd.com/en/corporate/product-security/bulletin/amd-sb-1004 · Vendor Advisory
• https://t.me/cvenotify/14362 · Telegram Post
• https://t.me/cvenotify/15015 · Telegram Post