CVE-2021-32847

Public Exploit
Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx

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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.10%
Third-Party Advisory github.com
Affected: moby hyperkit
Published at:
Updated at:

References

Link Tags
https://securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit/ third party advisory exploit
https://github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316 exploit product
https://github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f patch

Frequently Asked Questions

What is the severity of CVE-2021-32847?
CVE-2021-32847 has been scored as a high severity vulnerability.
How to fix CVE-2021-32847?
To fix CVE-2021-32847, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32847 being actively exploited in the wild?
It is possible that CVE-2021-32847 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32847?
CVE-2021-32847 affects moby hyperkit.
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