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CVE-2021-32847— Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx

Quick assessment

Affected
moby hyperkit
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.

HyperKit是Moby开源的一个用于在应用程序中嵌入虚拟机监控程序功能的工具包。 HyperKit 0.20210107及之前版本存在安全漏洞，该漏洞源于恶意攻击者可以通过滥用磁盘驱动器触发主机中的漏洞，可能会导致主机内存泄露。

CVSS 7.1 · High EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2021-32847

Vulnerability Information
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Vulnerability Title
Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx
Source: CVE Program / CVE List V5
Vulnerability Description
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior, a malicious guest can trigger a vulnerability in the host by abusing the disk driver that may lead to the disclosure of the host memory into the virtualized guest. This issue is fixed in commit cf60095a4d8c3cb2e182a14415467afd356e982f.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
HyperKit 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HyperKit是Moby开源的一个用于在应用程序中嵌入虚拟机监控程序功能的工具包。 HyperKit 0.20210107及之前版本存在安全漏洞，该漏洞源于恶意攻击者可以通过滥用磁盘驱动器触发主机中的漏洞，可能会导致主机内存泄露。
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
moby hyperkit 0.20210107 ~ 0.20210107 -

II. Public POCs for CVE-2021-32847

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III. Intelligence Information for CVE-2021-32847

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Patches & Fixes for CVE-2021-32847 (1)

Other References for CVE-2021-32847 (2)

IV. Related Vulnerabilities

Same product: hyperkit
Same vendor: moby
Same weakness: CWE-125

V. Comments for CVE-2021-32847

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