Medium severity · published Feb 17, 2023
CVE-2021-32844
HyperKit is a toolkit for embedding hypervisor capabilities in an application
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` 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 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HY
Hyperkit · Mobyproject
through 0.20210107 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32844
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-32844
Patch
https://github.com/moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13
Patch
https://github.com/moby/hyperkit/pull/313
Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
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