High severity · published Nov 16, 2021
CVE-2021-26315
When the AMD Platform Security Processor (PSP) boot rom loads, authenticates, and subsequently decrypts an encrypted FW, due to insufficient verification of the integrity of…
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
When the AMD Platform Security Processor (PSP) boot rom loads, authenticates, and subsequently decrypts an encrypted FW, due to insufficient verification of the integrity of decrypted image, arbitrary code may be executed in the PSP when encrypted firmware images are used.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7003 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 72f3 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7313 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7313p Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7343 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 73f3 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7413 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7443 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7443p Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7453 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 74f3 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
E7
Epyc 7513 Firmware · Amd
before milanpi-sp3_1.0.0.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26315
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26315
Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021
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