Improper access control in AMD products - CVE-2021-26387

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Main Vulnerability Database Vulnerabilities #VU97952

Improper access control in AMD products - CVE-2021-26387

Published: October 2, 2024


Vulnerability identifier: #VU97952
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-26387
CWE-ID: CWE-284
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
4th Gen AMD EPYC Processors

Detailed vulnerability description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper access restrictions in ASP kernel. A local privileged user with access to AMD signing keys and the BIOS menu or UEFI shell can map DRAM regions in protected areas.


How to mitigate CVE-2021-26387

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

The vendor is not planning to release security fixes to address this vulnerability.


Sources