Home/CVE/Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC s
CVE

CVE-2023-31355

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC s

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC seed potentially allowing reading of memory from a decommissioned guest.

MEDIUM · CVSS 6 EPSS 0.00795
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0

Affected Products & Versions

60
amd epyc 7203 firmware< milanpi_1.0.0.d
amd epyc 7203p firmware< milanpi_1.0.0.d
amd epyc 72f3 firmware< milanpi_1.0.0.d
amd epyc 7303 firmware< milanpi_1.0.0.d
amd epyc 7303p firmware< milanpi_1.0.0.d
amd epyc 7313 firmware< milanpi_1.0.0.d
amd epyc 7313p firmware< milanpi_1.0.0.d
amd epyc 7343 firmware< milanpi_1.0.0.d

Scoring & Timeline

6
MEDIUM · CVSS v3.1 · psirt@amd.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Aug 2024 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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