Medium severity · published Feb 13, 2024
CVE-2023-31347
Due to a code bug in Secure_TSC, SEV firmware may allow an attacker with high privileges to cause a guest to observe an incorrect TSC when Secure TSC is enabled potentially…
4.9
CVSS
0.5%
EPSS
No
On KEV
Description
Due to a code bug in
Secure_TSC, SEV firmware may allow an attacker with high privileges to cause a
guest to observe an incorrect TSC when Secure TSC is enabled potentially
resulting in a loss of guest integrity.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E7
Epyc 7203 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7203p Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 72f3 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7303 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7303p Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7313 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7313p Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7343 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7373x Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 73f3 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7413 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
E7
Epyc 7443 Firmware · Amd
before milanpi_1.0.0.c · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-31347
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-31347
Broken Link
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3007
More from Epyc 7203 Firmware
10.0
CVE-2023-20591
Improper re-initialization of IOMMU during the DRTM event may permit an untrusted platform configuration to persist, allowing an attacker to read or modify hypervisor memory,…
8.2
CVE-2021-26344
An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to…
7.9
CVE-2024-21980
Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of…
7.9
CVE-2024-21978
Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption
7.5
CVE-2023-20566
Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity