CVE-2021-32845

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Summary

CVECVE-2021-32845
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-02-17 23:15:00 UTC
Updated2023-06-26 17:47:00 UTC
DescriptionHyperKit 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.

Risk And Classification

Problem Types: CWE-252

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mobyproject Hyperkit All All All All

References

ReferenceSourceLinkTags
Various fixes by fredericdalleau · Pull Request #313 · moby/hyperkit · GitHub MISC github.com
Fix vtrnd pci_vtrnd_notify uninitialized memory use (GHSL-2021-056) · moby/hyperkit@41272a9 · GitHub MISC github.com
GHSL-2021-054_057: Code execution outside the virtualized guest in hyperkit - CVE-2021-32843, CVE-2021-32844, CVE-2021-32845, CVE-2021-32846 | GitHub Security Lab CONFIRM securitylab.github.com
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