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CVE-2023-20521

3.3 · LOW

TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial…

Published Nov 14, 2023CWE-367EPSS 0.26%

Overview

CVE-2023-20521 is a low-severity vulnerability. It was published on November 14, 2023 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial of service.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002Refwww.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002Refwww.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001Refwww.amd.com/en/corporate/product-security/bulletin/AMD-SB-3002Refwww.amd.com/en/corporate/product-security/bulletin/AMD-SB-4002Refwww.amd.com/en/corporate/product-security/bulletin/AMD-SB-5001

How CyberStrike helps

Frequently asked questions

What is CVE-2023-20521?

CVE-2023-20521 is a low-severity vulnerability. It was published on November 14, 2023 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2023-20521?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-20521?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-20521?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-20521 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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