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CVE-2023-31355

Quick assessment

Affected
AMD 3rd Gen AMD EPYC™ Processors
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AMD SEV-SNP是美国超威半导体（AMD）公司的一个安全加密虚拟化固件。使用单个密钥来加密系统内存。 AMD SEV-SNP存在安全漏洞，该漏洞源于对写入操作的不当限制导致恶意虚拟机管理程序覆盖客户的UMC种子，从而允许读取客户的内存。

CVSS 6.0 · Medium EPSS 0.44% · P36
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I. Basic Information for CVE-2023-31355

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
AMD SEV-SNP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AMD SEV-SNP是美国超威半导体（AMD）公司的一个安全加密虚拟化固件。使用单个密钥来加密系统内存。 AMD SEV-SNP存在安全漏洞，该漏洞源于对写入操作的不当限制导致恶意虚拟机管理程序覆盖客户的UMC种子，从而允许读取客户的内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AMD 3rd Gen AMD EPYC™ Processors various ~ MilanPI 1.0.0.D -
AMD 4th Gen AMD EPYC™ Processors various ~ GenoaPI 1.0.0.C -
AMD AMD EPYC™ Embedded 7003 various ~ EmbMilanPI-SP3 1.0.0.9 -
AMD AMD EPYC™ Embedded 9003 various ~ EmbGenoaPI-SP5 1.0.0.7 -

II. Public POCs for CVE-2023-31355

# POC Description Source Link Shenlong Link
1 None https://github.com/Freax13/cve-2023-31355-poc POC Details
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III. Intelligence Information for CVE-2023-31355

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Other References for CVE-2023-31355 (1)

Same Patch Batch · AMD · 2024-08-05 · 3 CVEs total

CVE-2024-21980 7.9 HIGH AMD SEV-SNP 安全漏洞
CVE-2024-21978 6.0 MEDIUM AMD SEV-SNP 安全漏洞

IV. Related Vulnerabilities

Same product: 3rd Gen AMD EPYC™ Processors
Same vendor: AMD
Same weakness: CWE-119

V. Comments for CVE-2023-31355

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