CVE-2021-32845: Moby HyperKit uninitialized memory use vtrnd pci_vtrnd_notify
First published: Fri Feb 17 2023(Updated: )
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, the implementation of `qnotify` at `pci_vtrnd_notify` fails to check the return value of `vq_getchain`. This leads to `struct iovec iov;` being uninitialized and used to read memory in `len = (int) read(sc->vrsc_fd, iov.iov_base, iov.iov_len);` when an attacker is able to make `vq_getchain` fail. This issue may lead to a guest crashing the host causing a denial of service and, under certain circumstance, memory corruption. This issue is fixed in commit 41272a980197917df8e58ff90642d14dec8fe948.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mobyproject Hyperkit | <=0.20210107 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-32845?
CVE-2021-32845 is a vulnerability in HyperKit, a toolkit for embedding hypervisor capabilities in an application.
What is the severity of CVE-2021-32845?
CVE-2021-32845 has a severity rating of 7.8 (High)
How does CVE-2021-32845 affect HyperKit?
CVE-2021-32845 affects HyperKit versions 0.20210107 and prior.
How can I fix CVE-2021-32845?
To fix CVE-2021-32845, update to a version of HyperKit that is newer than 0.20210107.
Where can I find more information about CVE-2021-32845?
You can find more information about CVE-2021-32845 in the references provided.
- collector/nvd-index
- agent/weakness
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- agent/softwarecombine
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/references
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- vendor/mobyproject
- canonical/mobyproject hyperkit
- version/mobyproject hyperkit/0.20210107