Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 72F3 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 72F3 | - |
| Amd | Epyc 7313 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7313 | - |
| Amd | Epyc 7313P Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7313P | - |
| Amd | Epyc 7343 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7343 | - |
| Amd | Epyc 7373X Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7373X | - |
| Amd | Epyc 73F3 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 73F3 | - |
| Amd | Epyc 7413 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7413 | - |
| Amd | Epyc 7443 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7443 | - |
| Amd | Epyc 7443P Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7443P | - |
| Amd | Epyc 7453 Firmware | milanpi_1.0.0.9 |
| Amd | Epyc 7453 | - |
Related Weaknesses (CWE)
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-2021-46756?
CVE-2021-46756 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 boot...
How severe is CVE-2021-46756?
CVE-2021-46756 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-46756?
Check the references section above for vendor advisories and patch information. Affected products include: Amd Epyc 72F3 Firmware, Amd Epyc 72F3, Amd Epyc 7313 Firmware, Amd Epyc 7313, Amd Epyc 7313P Firmware.