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CVE-2021-32843

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 有一个对 的调用，它不检查 null，调用时会导致主机崩溃，从而导致拒绝服务。

CVSS 6.2 · Medium EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-32843

Vulnerability Information
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Vulnerability Title
N/A
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 of HyperKit, `virtio.c` has is a call to `vc_cfgread` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
HyperKit 代码问题漏洞
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`virtio.c` 有一个对 `vc_cfgread` 的调用，它不检查 null，调用时会导致主机崩溃，从而导致拒绝服务。
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-2021-32843

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III. Intelligence Information for CVE-2021-32843

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Patches & Fixes for CVE-2021-32843 (2)

Other References for CVE-2021-32843 (1)

Same Patch Batch · moby · 2023-02-17 · 4 CVEs total

CVE-2021-32845 7.7 HIGH Moby HyperKit uninitialized memory use vtrnd pci_vtrnd_notify
CVE-2021-32846 7.7 HIGH Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx
CVE-2021-32844 6.2 MEDIUM HyperKit 代码问题漏洞

IV. Related Vulnerabilities

Same product: hyperkit
Same vendor: moby
Same weakness: CWE-476

V. Comments for CVE-2021-32843

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