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CVE-2021-46756

CRITICALCVSS 9.1/10EPSS 0.65%

Last modified

CVE-2021-46756 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity. . EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.

Metrics

CVSS 3.1
9.1/10

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

EPSS Probability
0.65%

46.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
AmdEpyc 72f3 Firmwaremilanpi_1.0.0.9
AmdEpyc 7313 Firmwaremilanpi_1.0.0.9
AmdEpyc 7313p Firmwaremilanpi_1.0.0.9
AmdEpyc 7343 Firmwaremilanpi_1.0.0.9
AmdEpyc 7373x Firmwaremilanpi_1.0.0.9
AmdEpyc 73f3 Firmwaremilanpi_1.0.0.9
AmdEpyc 7413 Firmwaremilanpi_1.0.0.9
AmdEpyc 7443 Firmwaremilanpi_1.0.0.9
AmdEpyc 7443p Firmwaremilanpi_1.0.0.9
AmdEpyc 7453 Firmwaremilanpi_1.0.0.9
AmdEpyc 7473x Firmwaremilanpi_1.0.0.9
AmdEpyc 74f3 Firmwaremilanpi_1.0.0.9
AmdEpyc 7513 Firmwaremilanpi_1.0.0.9
AmdEpyc 7543 Firmwaremilanpi_1.0.0.9
AmdEpyc 7543p Firmwaremilanpi_1.0.0.9
AmdEpyc 7573x Firmwaremilanpi_1.0.0.9
AmdEpyc 75f3 Firmwaremilanpi_1.0.0.9
AmdEpyc 7643 Firmwaremilanpi_1.0.0.9
AmdEpyc 7663 Firmwaremilanpi_1.0.0.9
AmdEpyc 7713 Firmwaremilanpi_1.0.0.9
AmdEpyc 7713p Firmwaremilanpi_1.0.0.9
AmdEpyc 7763 Firmwaremilanpi_1.0.0.9
AmdEpyc 7773x Firmwaremilanpi_1.0.0.9
AmdEpyc 7232p Firmwareromepi_1.0.0.e
AmdEpyc 7252 Firmwareromepi_1.0.0.e
AmdEpyc 7262 Firmwareromepi_1.0.0.e
AmdEpyc 7272 Firmwareromepi_1.0.0.e
AmdEpyc 7282 Firmwareromepi_1.0.0.e
AmdEpyc 7302 Firmwareromepi_1.0.0.e
AmdEpyc 7302p Firmwareromepi_1.0.0.e
AmdEpyc 7352 Firmwareromepi_1.0.0.e
AmdEpyc 7402 Firmwareromepi_1.0.0.e
AmdEpyc 7402p Firmwareromepi_1.0.0.e
AmdEpyc 7452 Firmwareromepi_1.0.0.e
AmdEpyc 7502 Firmwareromepi_1.0.0.e
AmdEpyc 7502p Firmwareromepi_1.0.0.e
AmdEpyc 7532 Firmwareromepi_1.0.0.e
AmdEpyc 7542 Firmwareromepi_1.0.0.e
AmdEpyc 7552 Firmwareromepi_1.0.0.e
AmdEpyc 7642 Firmwareromepi_1.0.0.e
AmdEpyc 7662 Firmwareromepi_1.0.0.e
AmdEpyc 7702 Firmwareromepi_1.0.0.e
AmdEpyc 7702p Firmwareromepi_1.0.0.e
AmdEpyc 7742 Firmwareromepi_1.0.0.e
AmdEpyc 7f32 Firmwareromepi_1.0.0.e
AmdEpyc 7f52 Firmwareromepi_1.0.0.e
AmdEpyc 7f72 Firmwareromepi_1.0.0.e
AmdEpyc 7h12 Firmwareromepi_1.0.0.e
AmdEpyc 7251 Firmwarenaplespi_1.0.0.j
AmdEpyc 7261 Firmwarenaplespi_1.0.0.j

Showing 50 of 63 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-46756?
Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.
How severe is CVE-2021-46756?
CVE-2021-46756 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.
How do I fix CVE-2021-46756?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-46756?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST