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CVE-2022-27672

Quick assessment

Affected
AMD 1st Gen AMD EPYC™ Processors
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xen是英国剑桥（Cambridge）大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.17之前版本存在安全漏洞，该漏洞源于在某些 AMD CPU 上，RAS在非空闲线程之间动态分区，这允许攻击者控制相邻线程上的推测执行，攻击者利用该漏洞能够推断出任意主机的内存，包括分配给其他客人的内存。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1592.004 · Client Configurations
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I. Basic Information for CVE-2022-27672

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
When SMT is enabled, certain AMD processors may speculatively execute instructions using a target from the sibling thread after an SMT mode switch potentially resulting in information disclosure.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Xen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是英国剑桥（Cambridge）大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 4.17之前版本存在安全漏洞，该漏洞源于在某些 AMD CPU 上，RAS在非空闲线程之间动态分区，这允许攻击者控制相邻线程上的推测执行，攻击者利用该漏洞能够推断出任意主机的内存，包括分配给其他客人的内存。
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 1st Gen AMD EPYC™ Processors Contact your OS vendor -
AMD 2nd Gen AMD EPYC™ Processors Contact your OS vendor -
AMD Athlon™ X4 Processor Contact your OS vendor -
AMD Ryzen™ Threadripper™ PRO Processor Contact your OS vendor -
AMD 2nd Gen AMD Ryzen™ Threadripper™ Processors Contact your OS vendor -
AMD 3rd Gen AMD Ryzen™ Threadripper™ Processors Contact your OS vendor -
AMD 7th Generation AMD A-Series APUs Contact your OS vendor -
AMD Ryzen™ 2000 Series Processors Contact your OS vendor -
AMD Ryzen™ 3000 Series Processors Contact your OS vendor -
AMD Ryzen™ 4000 Series Processors Contact your OS vendor -
AMD Ryzen™ 5000 Series Processors Contact your OS vendor -
AMD Athlon™ Mobile Processors Contact your OS vendor -

II. Public POCs for CVE-2022-27672

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2022-27672

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Vendor Advisories for CVE-2022-27672 (1)

Other References for CVE-2022-27672 (1)

IV. Related Vulnerabilities

Same product: 1st Gen AMD EPYC™ Processors
Same vendor: AMD

V. Comments for CVE-2022-27672

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