medium
5.7
CWE
367
Advisory Published
Updated

CVE-2023-20521

First published: Tue Nov 14 2023(Updated: )

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.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
All of
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC 7001 Firmware
All of
AMD EPYC 7251 Firmware<naplespi_1.0.0.h
AMD EPYC 7251 Firmware
All of
AMD EPYC 7261 Firmware<naplespi_1.0.0.h
AMD EPYC 7261
All of
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC Server
All of
Amd Epyc Server Firmware<naplespi_1.0.0.h
AMD EPYC 7301 Firmware
All of
AMD EPYC 7351P Firmware<naplespi_1.0.0.h
AMD EPYC 7351 Firmware
All of
AMD EPYC 7351P Firmware<naplespi_1.0.0.h
AMD EPYC 7351P Firmware
All of
AMD EPYC 7371 Firmware<naplespi_1.0.0.h
AMD EPYC 7371 Firmware
All of
AMD EPYC 7401P Firmware<naplespi_1.0.0.h
AMD EPYC 7401 Firmware
All of
AMD EPYC 7401P Firmware<naplespi_1.0.0.h
AMD EPYC 7401P Firmware
All of
AMD EPYC 7451 Firmware<naplespi_1.0.0.h
AMD EPYC 7451 Firmware
All of
AMD EPYC 7501 Firmware<naplespi_1.0.0.h
AMD EPYC Server
All of
AMD EPYC 7551P Firmware<naplespi_1.0.0.h
AMD EPYC 7551 Firmware
All of
AMD EPYC 7551P Firmware<naplespi_1.0.0.h
AMD EPYC 7551P Firmware
All of
AMD EPYC 7601 Firmware<naplespi_1.0.0.h
AMD EPYC 7601 Firmware
All of
AMD EPYC 7232p firmware<romepi_1.0.0.d
AMD EPYC 7232p firmware
All of
AMD EPYC 7252 Firmware<romepi_1.0.0.d
AMD EPYC 7252 Firmware
All of
AMD EPYC 7262 Firmware<romepi_1.0.0.d
AMD EPYC 7262 Firmware
All of
AMD EPYC 7272 firmware<romepi_1.0.0.d
AMD EPYC 7272 firmware
All of
AMD EPYC 7282 Firmware<romepi_1.0.0.d
AMD EPYC 7282 Firmware
All of
Amd Epyc Server Firmware<romepi_1.0.0.d
AMD EPYC 7302 Firmware
All of
AMD EPYC 7302P Firmware<romepi_1.0.0.d
AMD EPYC 7302P Firmware
All of
AMD EPYC Firmware<romepi_1.0.0.d
AMD EPYC 7352 firmware
All of
Amd Epyc Server Firmware<romepi_1.0.0.d
AMD EPYC 7402 Firmware
All of
AMD EPYC 7402P Firmware<romepi_1.0.0.d
AMD EPYC 7402P Firmware
All of
AMD EPYC 7452 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7502 Firmware<romepi_1.0.0.d
AMD EPYC 7502 firmware
All of
AMD EPYC 7502P Firmware<romepi_1.0.0.d
AMD EPYC 7502P Firmware
All of
AMD EPYC 7532 Firmware<romepi_1.0.0.d
AMD EPYC 7532 Firmware
All of
AMD EPYC 7542 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7552 Firmware<romepi_1.0.0.d
AMD EPYC 7552 Firmware
All of
AMD EPYC 7642 Firmware<romepi_1.0.0.d
AMD EPYC 7642 Firmware
All of
AMD EPYC 7662 Firmware<romepi_1.0.0.d
AMD EPYC 7662 Firmware
All of
AMD EPYC 7702p firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7702 Firmware<romepi_1.0.0.d
AMD EPYC 7702P
All of
AMD EPYC 7742 Firmware<romepi_1.0.0.d
AMD EPYC Server
All of
AMD EPYC 7F32 Firmware<romepi_1.0.0.d
AMD EPYC 7F32 Firmware
All of
AMD EPYC 7F52 Firmware<romepi_1.0.0.d
AMD EPYC 7F52 Firmware
All of
AMD EPYC 7F72<romepi_1.0.0.d
AMD EPYC 7F72 Firmware
All of
AMD EPYC 7H12 Firmware<romepi_1.0.0.d
AMD EPYC 7H12 Firmware
All of
AMD EPYC 7763 Firmware<milanpi_1.0.0.7
AMD EPYC 7763 Firmware
All of
AMD EPYC 7713P Firmware<milanpi_1.0.0.7
AMD EPYC 7713P Firmware
All of
AMD EPYC 7713P Firmware<milanpi_1.0.0.7
AMD EPYC 7713 Firmware
All of
AMD EPYC 7663P Firmware<milanpi_1.0.0.7
AMD EPYC 7663P Firmware
All of
AMD EPYC 7663 Firmware<milanpi_1.0.0.7
AMD EPYC 7663 Firmware
All of
AMD EPYC Firmware<milanpi_1.0.0.7
AMD EPYC 7643P Firmware
All of
AMD EPYC 7773X Firmware<milanpi_1.0.0.7
AMD EPYC 7773X Firmware
All of
AMD EPYC 7643P Firmware<milanpi_1.0.0.7
AMD EPYC 7643 Firmware
All of
AMD EPYC 7573X Firmware<milanpi_1.0.0.7
AMD EPYC 7573X Firmware
All of
AMD EPYC 75F3 Firmware<milanpi_1.0.0.7
AMD EPYC 75F3 Firmware
All of
AMD EPYC 7543P Firmware<milanpi_1.0.0.7
AMD EPYC 7543P Firmware
All of
Amd Epyc Server Firmware<milanpi_1.0.0.7
AMD EPYC 7543 Firmware
All of
AMD EPYC 7513 Firmware<milanpi_1.0.0.7
AMD EPYC 7513 Firmware
All of
AMD EPYC 7473X Firmware<milanpi_1.0.0.7
AMD EPYC 7473X Firmware
All of
Amd Epyc Server Firmware<milanpi_1.0.0.7
AMD EPYC Server
All of
AMD EPYC 74F3 Firmware<milanpi_1.0.0.7
AMD EPYC 74F3 Firmware
All of
AMD EPYC 7443P Firmware<milanpi_1.0.0.7
AMD EPYC 7443P Firmware
All of
AMD EPYC 7443P Firmware<milanpi_1.0.0.7
AMD EPYC 7443P
All of
AMD EPYC 7413 Firmware<milanpi_1.0.0.7
AMD EPYC 7413 Firmware
All of
AMD EPYC 7373X Firmware<milanpi_1.0.0.7
AMD EPYC 7373X Firmware
All of
AMD EPYC 73F3 Firmware<milanpi_1.0.0.7
AMD EPYC 73F3 Firmware
All of
Amd Epyc Server Firmware<milanpi_1.0.0.7
AMD EPYC 7343 Firmware
All of
AMD EPYC 7313P Firmware<milanpi_1.0.0.7
AMD EPYC 7313P Firmware
All of
AMD EPYC Firmware<milanpi_1.0.0.7
AMD EPYC 7313 Firmware
All of
AMD EPYC 7303P Firmware<milanpi_1.0.0.7
AMD EPYC 7303P
All of
AMD EPYC 7303 Firmware<milanpi_1.0.0.7
AMD EPYC 7303 Firmware
All of
AMD EPYC 72F3 Firmware<milanpi_1.0.0.7
AMD EPYC 72F3 Firmware
All of
AMD EPYC Firmware<milanpi_1.0.0.7
AMD EPYC 7203P Firmware
All of
AMD EPYC 7203 Firmware<milanpi_1.0.0.7
AMD EPYC 7203 Firmware
All of
AMD Athlon Pro 300GE Firmware
AMD Athlon Pro 300GE Firmware
All of
AMD Athlon Gold Pro 3150GE
AMD Athlon Gold Pro 3150GE Firmware
All of
AMD Athlon Gold Pro 3150G Firmware
AMD Athlon Gold 3150G Firmware
All of
AMD Athlon Gold Pro 3150G Firmware
AMD Athlon Gold Pro 3150G Firmware
All of
AMD Ryzen Threadripper 2990WX<summitpi-sp3r2_1.1.0.6
AMD Ryzen Threadripper 2990WX
All of
AMD Ryzen Threadripper 2970WX Firmware<summitpi-sp3r2_1.1.0.6
AMD Ryzen Threadripper 2970WX Firmware
All of
AMD Ryzen Threadripper 2950X Firmware<summitpi-sp3r2_1.1.0.6
AMD Ryzen Threadripper 2950X Firmware
All of
AMD Ryzen Threadripper 2920X<summitpi-sp3r2_1.1.0.6
AMD Ryzen Threadripper 2920X Firmware
All of
AMD Ryzen 7 3780U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 7 3780U Firmware
All of
AMD Ryzen 7 3750H Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 7 3750H Firmware
All of
AMD Ryzen 7 3700C Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 7 3700C Firmware
All of
AMD Ryzen 7 Pro 3700U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 7 3700U
All of
AMD Ryzen 5 3580U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 5 3580U Firmware
All of
AMD Ryzen 5 3550H Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 5 3550H Firmware
All of
AMD Ryzen 5 3500C Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 5 3500C Firmware
All of
AMD Ryzen 5 Pro 3500U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 5 3500U Firmware
All of
AMD Ryzen 5 3450U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 5 3450U
All of
AMD Ryzen 3 3350U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 3 3350U Firmware
All of
AMD Ryzen 3 Pro 3300U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 3 Pro 3300U
All of
AMD Ryzen 3 3250U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 3 3250U Firmware
All of
AMD Ryzen 3 3250C Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 3 3250C Firmware
All of
AMD Ryzen 3 3200U Firmware<picassopi-fp5_1.0.0.e
AMD Ryzen 3 3200U Firmware
All of
AMD 3015e firmware<pollockpi-ft5_1.0.0.4
AMD 3015e firmware
All of
AMD 3015CE Firmware<pollockpi-ft5_1.0.0.4
AMD AMD 3015ce firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-20521?

    The severity of CVE-2023-20521 is considered high due to the potential compromise of confidentiality and denial of service.

  • How do I fix CVE-2023-20521?

    To fix CVE-2023-20521, update to the latest firmware version provided by AMD that addresses this vulnerability.

  • Who is affected by CVE-2023-20521?

    CVE-2023-20521 affects specific AMD EPYC processor firmware versions prior to the latest release.

  • What does CVE-2023-20521 exploit involve?

    CVE-2023-20521 involves a time-of-check to time-of-use (TOCTOU) vulnerability that allows an attacker with physical access to manipulate SPI ROM records.

  • What could happen if CVE-2023-20521 is exploited?

    Exploitation of CVE-2023-20521 could lead to unauthorized access to sensitive data or denial of service due to compromised firmware integrity.

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