CVE-2023-20521

MediumCVSS 5.7/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.7/10CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness enumeration

CWE-367

Affected software

No affected versions have been published.

Timeline

Published: Nov 14, 2023
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2023

CVE-2023-205227.5Insufficient input validation in ASP may allow an attacker with a malicious BIOS to potentially cause a denial of service.CVE-2023-205235.7TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of s CVE-2023-205247.5An attacker with a compromised ASP could possibly send malformed commands to an ASP on another CPU, resulting in an out of bounds write, pot CVE-2023-205256.5Insufficient syscall input validation in the ASP Bootloader may allow a privileged attacker to read memory outside the bounds of a mapped re CVE-2023-205264.6Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memo CVE-2023-205276.5Improper syscall input validation in the ASP Bootloader may allow a privileged attacker to read memory out-of-bounds, potentially leading to CVE-2023-205282.4Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leadin CVE-2023-205297.5Insufficient bound checks in the SMU may allow an attacker to update the from/to address space to an invalid value potentially resulting in CVE-2023-20538.8A vulnerability, which was classified as critical, has been found in Campcodes Advanced Online Voting System 1.0. Affected by this issue is CVE-2023-205307.5Insufficient input validation of BIOS mailbox messages in SMU may result in out-of-bounds memory reads potentially resulting in a denial of CVE-2023-205317.5Insufficient bound checks in the SMU may allow an attacker to update the SRAM from/to address space to an invalid value potentially resultin CVE-2023-205325.3Insufficient input validation in the SMU may allow an attacker to improperly lock resources, potentially resulting in a denial of service.