#VU84026 Time-of-check Time-of-use (TOCTOU) Race Condition in AMD products - CVE-2023-20521

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Main Vulnerability Database Vulnerabilities #VU84026

#VU84026 Time-of-check Time-of-use (TOCTOU) Race Condition in AMD products - CVE-2023-20521

Published: December 8, 2023


Vulnerability identifier: #VU84026
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-20521
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
1st Gen AMD EPYC Processors
2nd Gen AMD EPYC Processors
3rd Gen AMD EPYC Processors
Software vendor:
AMD

Description

The vulnerability allows an attacker to perform a denial of service attack.

The vulnerability exists due to a race condition in ASP Bootloader. An attacker with physical access to device can tamper with SPI ROM records after memory content verification and gain access to sensitive information of perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

External links