CVE-2021-26371 — MEDIUM (5.5)

Q: How severe is CVE-2021-26371?

CVE-2021-26371 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-26371?

Check the references section above for vendor advisories and patch information. Affected products include: Amd Epyc 7773X Firmware, Amd Epyc 7773X, Amd Epyc 7763 Firmware, Amd Epyc 7763, Amd Epyc 7713P Firmware.

Vulnerability Description

A compromised or malicious ABL or UApp could send a SHA256 system call to the bootloader, which may result in exposure of ASP memory to userspace, potentially leading to information disclosure.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Amd	Epyc 7773X Firmware	< milanpi_1.0.0.6
Amd	Epyc 7773X	-
Amd	Epyc 7763 Firmware	< milanpi_1.0.0.6
Amd	Epyc 7763	-
Amd	Epyc 7713P Firmware	< milanpi_1.0.0.6
Amd	Epyc 7713P	-
Amd	Epyc 7713 Firmware	< milanpi_1.0.0.6
Amd	Epyc 7713	-
Amd	Epyc 7663 Firmware	< milanpi_1.0.0.6
Amd	Epyc 7663	-
Amd	Epyc 7643 Firmware	< milanpi_1.0.0.6
Amd	Epyc 7643	-
Amd	Epyc 75F3 Firmware	< milanpi_1.0.0.6
Amd	Epyc 75F3	-
Amd	Epyc 7573X Firmware	< milanpi_1.0.0.6
Amd	Epyc 7573X	-
Amd	Epyc 7543P Firmware	< milanpi_1.0.0.6
Amd	Epyc 7543P	-
Amd	Epyc 7543 Firmware	< milanpi_1.0.0.6
Amd	Epyc 7543	-

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001Vendor Advisory

FAQ

What is CVE-2021-26371?

CVE-2021-26371 is a vulnerability with a CVSS score of 5.5 (MEDIUM). A compromised or malicious ABL or UApp could send a SHA256 system call to the bootloader, which may result in exposure of ASP memory to userspace, potentially leading to information disclosure. ...

How severe is CVE-2021-26371?

CVE-2021-26371 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-26371?

Check the references section above for vendor advisories and patch information. Affected products include: Amd Epyc 7773X Firmware, Amd Epyc 7773X, Amd Epyc 7763 Firmware, Amd Epyc 7763, Amd Epyc 7713P Firmware.