medium
5.7
CWE
367
Advisory Published
Updated

CVE-2023-20523

First published: Tue Jan 10 2023(Updated: )

TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
AMD EPYC 7H12 Firmware<romepi_1.0.0.c
AMD EPYC 7H12
AMD EPYC 7F72 Firmware<romepi_1.0.0.c
AMD EPYC 7F72
AMD EPYC 7F52 Firmware<romepi_1.0.0.c
AMD EPYC 7F52
AMD EPYC 7F32 Firmware<romepi_1.0.0.c
AMD EPYC 7F32 Firmware
AMD EPYC 7742 firmware<romepi_1.0.0.c
AMD EPYC 7742 firmware
AMD EPYC 7702 Firmware<romepi_1.0.0.c
AMD EPYC 7702p
AMD EPYC 7702 Firmware<romepi_1.0.0.c
AMD EPYC 7702
AMD EPYC 7662 Firmware<romepi_1.0.0.c
AMD EPYC 7662
AMD EPYC 7642 Firmware<romepi_1.0.0.c
AMD EPYC 7642 Firmware
AMD EPYC 7552 Firmware<romepi_1.0.0.c
AMD EPYC Embedded 7552
AMD EPYC 7542 Firmware<romepi_1.0.0.c
AMD EPYC 7542
AMD EPYC 7532 Firmware<romepi_1.0.0.c
AMD EPYC 7532
AMD EPYC 7502P Firmware<romepi_1.0.0.c
AMD EPYC 7502P
Amd Epyc Server Firmware<romepi_1.0.0.c
AMD EPYC 7502
AMD EPYC 7452 Firmware<romepi_1.0.0.c
AMD EPYC 7452
Amd Epyc Server Firmware<romepi_1.0.0.c
AMD EPYC 7402
AMD EPYC 7402P Firmware<romepi_1.0.0.c
AMD EPYC 7402P
AMD EPYC 7352 firmware<romepi_1.0.0.c
AMD EPYC 7352
AMD EPYC 7302P Firmware<romepi_1.0.0.c
AMD EPYC 7302P
Amd Epyc Server Firmware<romepi_1.0.0.c
AMD EPYC 7302P
AMD EPYC 7282 Firmware<romepi_1.0.0.c
AMD EPYC 7282
AMD EPYC 7272 firmware<romepi_1.0.0.c
AMD EPYC 7272 firmware
AMD EPYC 7262 Firmware<romepi_1.0.0.c
AMD EPYC 7262 Firmware
AMD EPYC 7252 Firmware<romepi_1.0.0.c
AMD EPYC 7252 Firmware
AMD EPYC 7232p firmware<romepi_1.0.0.c
AMD EPYC 7232p firmware
AMD EPYC 7002 Firmware<romepi_1.0.0.c
AMD EPYC 7002
Amd Epyc Server Firmware<milanpi_1.0.0.5
amd epyc 7003
AMD EPYC 72F3 Firmware<milanpi_1.0.0.5
AMD EPYC 72F3 Firmware
Amd Epyc Server Firmware<milanpi_1.0.0.5
AMD EPYC 7313P
AMD EPYC 7313P Firmware<milanpi_1.0.0.5
AMD EPYC 7313P
Amd Epyc Server Firmware<milanpi_1.0.0.5
AMD EPYC 7343
AMD EPYC 7373X Firmware<milanpi_1.0.0.5
AMD EPYC 7373X
AMD EPYC 73F3 Firmware<milanpi_1.0.0.5
AMD EPYC 73F3
AMD EPYC 7413 Firmware<milanpi_1.0.0.5
AMD EPYC 7413 Firmware
AMD EPYC 7443 Firmware<milanpi_1.0.0.5
AMD EPYC 7443
AMD EPYC 7443P Firmware<milanpi_1.0.0.5
AMD EPYC 7443P
Amd Epyc Server Firmware<milanpi_1.0.0.5
AMD EPYC 7453
AMD EPYC 74F3 Firmware<milanpi_1.0.0.5
AMD EPYC 74F3
AMD EPYC 7513 Firmware<milanpi_1.0.0.5
AMD EPYC 7513
Amd Epyc Server Firmware<milanpi_1.0.0.5
AMD EPYC 7543 Firmware
AMD EPYC 7543P Firmware<milanpi_1.0.0.5
AMD EPYC 7543P Firmware
AMD EPYC 7573X Firmware<milanpi_1.0.0.5
AMD EPYC 7573X
AMD EPYC 75F3 Firmware<milanpi_1.0.0.5
AMD EPYC 75F3
AMD EPYC 7643 Firmware<milanpi_1.0.0.5
AMD EPYC 7643
AMD EPYC 7663 Firmware<milanpi_1.0.0.5
AMD EPYC 7663 Firmware
AMD EPYC 7713P Firmware<milanpi_1.0.0.5
AMD EPYC 7713
AMD EPYC 7713P Firmware<milanpi_1.0.0.5
AMD EPYC 7713P Firmware
Amd Epyc Server Firmware<milanpi_1.0.0.5
amd epyc 7743
AMD EPYC 7763 Firmware<milanpi_1.0.0.5
AMD EPYC 7763 Firmware
AMD EPYC 7773X Firmware<milanpi_1.0.0.5
AMD EPYC 7773X

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-20523?

    CVE-2023-20523 has been classified with a severity that may lead to loss of integrity or denial of service due to TOCTOU conditions.

  • How do I fix CVE-2023-20523?

    To resolve CVE-2023-20523, update the AMD firmware to the version containing the security patches addressing this vulnerability.

  • What software is affected by CVE-2023-20523?

    CVE-2023-20523 affects various AMD EPYC firmware versions, notably those prior to specific updated versions like romepi_1.0.0.c and milanpi_1.0.0.5.

  • What is TOCTOU in relation to CVE-2023-20523?

    TOCTOU stands for Time-of-check to time-of-use vulnerabilities, which in the context of CVE-2023-20523, allows potential manipulation of buffer bounds.

  • Can CVE-2023-20523 lead to data breaches?

    Yes, CVE-2023-20523 has the potential to result in data breaches through loss of integrity if exploited by an attacker.

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