CVE-2021-26320 : Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND

Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP

Published 2021-11-16 19:15:08

Updated 2021-11-18 19:50:07

Source Advanced Micro Devices Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2021-26320

AMD » Epyc 7601 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7601_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7601 » Version: N/A
AMD » Epyc 7551p Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7551p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7551p » Version: N/A
AMD » Epyc 7551 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7551_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7551 » Version: N/A
AMD » Epyc 7501 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7501_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7501 » Version: N/A
AMD » Epyc 7451 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7451_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7451 » Version: N/A
AMD » Epyc 7401 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7401_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7401 » Version: N/A
AMD » Epyc 7371 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7371_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7371 » Version: N/A
AMD » Epyc 7351p Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7351p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7351p » Version: N/A
AMD » Epyc 7351 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7351_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7351 » Version: N/A
AMD » Epyc 7301 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7301_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7301 » Version: N/A
AMD » Epyc 7281 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7281_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7281 » Version: N/A
AMD » Epyc 7261 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7261_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7261 » Version: N/A
AMD » Epyc 7251 Firmware
Versions before (<) naplespi-sp3_1.0.0.g
cpe:2.3:o:amd:epyc_7251_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7251 » Version: N/A
AMD » Epyc 7f72 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7f72_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7f72 » Version: N/A
AMD » Epyc 7f52 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7f52_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7f52 » Version: N/A
AMD » Epyc 7f32 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7f32_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7f32 » Version: N/A
AMD » Epyc 7h12 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7h12_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7h12 » Version: N/A
AMD » Epyc 7742 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7742_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7742 » Version: N/A
AMD » Epyc 7702 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7702_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7702 » Version: N/A
AMD » Epyc 7702p Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7702p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7702p » Version: N/A
AMD » Epyc 7662 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7662_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7662 » Version: N/A
AMD » Epyc 7642 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7642_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7642 » Version: N/A
AMD » Epyc 7552 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7552_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7552 » Version: N/A
AMD » Epyc 7542 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7542_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7542 » Version: N/A
AMD » Epyc 7532 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7532_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7532 » Version: N/A
AMD » Epyc 7502 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7502_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7502 » Version: N/A
AMD » Epyc 7502p Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7502p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7502p » Version: N/A
AMD » Epyc 7452 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7452_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7452 » Version: N/A
AMD » Epyc 7402 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7402_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7402 » Version: N/A
AMD » Epyc 7402p Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7402p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7402p » Version: N/A
AMD » Epyc 7352 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7352_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7352 » Version: N/A
AMD » Epyc 7302 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7302_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7302 » Version: N/A
AMD » Epyc 7302p Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7302p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7302p » Version: N/A
AMD » Epyc 7282 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7282_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7282 » Version: N/A
AMD » Epyc 7272 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7272_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7272 » Version: N/A
AMD » Epyc 7262 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7262_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7262 » Version: N/A
AMD » Epyc 7252 Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7252_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7252 » Version: N/A
AMD » Epyc 7232p Firmware
Versions before (<) romepi-sp3_1.0.0.c
cpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7232p » Version: N/A
AMD » Epyc 7763 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7763 » Version: N/A
AMD » Epyc 7713p Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7713p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7713p » Version: N/A
AMD » Epyc 7713 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7713_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7713 » Version: N/A
AMD » Epyc 7663 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7663_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7663 » Version: N/A
AMD » Epyc 7643 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7643_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7643 » Version: N/A
AMD » Epyc 75f3 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_75f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 75f3 » Version: N/A
AMD » Epyc 7543p Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7543p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7543p » Version: N/A
AMD » Epyc 7543 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7543_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7543 » Version: N/A
AMD » Epyc 7513 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7513_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7513 » Version: N/A
AMD » Epyc 7453 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7453_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7453 » Version: N/A
AMD » Epyc 74f3 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_74f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 74f3 » Version: N/A
AMD » Epyc 7443p Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7443p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7443p » Version: N/A
AMD » Epyc 7443 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7443_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7443 » Version: N/A
AMD » Epyc 7413 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7413_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7413 » Version: N/A
AMD » Epyc 73f3 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_73f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 73f3 » Version: N/A
AMD » Epyc 7343 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7343 » Version: N/A
AMD » Epyc 7313p Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7313p » Version: N/A
AMD » Epyc 7313 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 7313 » Version: N/A
AMD » Epyc 72f3 Firmware
Versions before (<) milanpi-sp3_1.0.0.4
cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: AMD » Epyc 72f3 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-26320

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-26320

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-26320

CWE-295 Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.
Assigned by:
- nvd@nist.gov (Primary)
- psirt@amd.com (Secondary)

References for CVE-2021-26320

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021

Access Denied
Vendor Advisory

CVEs referencing this url

Jump to

Vulnerability Details : CVE-2021-26320

Products affected by CVE-2021-26320

Exploit prediction scoring system (EPSS) score for CVE-2021-26320

CVSS scores for CVE-2021-26320

CWE ids for CVE-2021-26320

References for CVE-2021-26320