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CVE-2023-46837— arm32: The cache may not be properly cleaned/invalidated (take two)

Quick assessment

Affected
Xen Xen
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 Arm32存在安全漏洞，该漏洞源于缓存没有被正确清理。攻击者利用该漏洞可以从缓存中读取敏感数据。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2023-46837

Vulnerability Information
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Vulnerability Title
arm32: The cache may not be properly cleaned/invalidated (take two)
Source: CVE Program / CVE List V5
Vulnerability Description
Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance, used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all the writes will reach the memory. This undefined behavior was meant to be addressed by XSA-437, but the approach was not sufficient.
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 Arm32存在安全漏洞，该漏洞源于缓存没有被正确清理。攻击者利用该漏洞可以从缓存中读取敏感数据。
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
Xen Xen consult Xen advisory XSA-447 -

II. Public POCs for CVE-2023-46837

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III. Intelligence Information for CVE-2023-46837

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Mailing List Discussions for CVE-2023-46837 (1)

Other References for CVE-2023-46837 (1)

Same Patch Batch · Xen · 2024-01-05 · 10 CVEs total

CVE-2023-46836 x86: BTC/SRSO fixes not fully effective
CVE-2023-46835 x86/AMD: mismatch in IOMMU quarantine page table levels
CVE-2023-34327 x86/AMD: Debug Mask handling
CVE-2023-34328 x86/AMD: Debug Mask handling
CVE-2023-34325 Multiple vulnerabilities in libfsimage disk handling
CVE-2023-34326 x86/AMD: missing IOMMU TLB flushing
CVE-2023-34323 xenstored: A transaction conflict can crash C Xenstored
CVE-2023-34322 top-level shadow reference dropped too early for 64-bit PV guests
CVE-2023-34321 arm32: The cache may not be properly cleaned/invalidated

IV. Related Vulnerabilities

Same product: Xen
Same vendor: Xen

V. Comments for CVE-2023-46837

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