Vulnerability Details CVE-2021-32845
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.1%
CVSS Severity
CVSS v3 Score 7.7
References
- https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948
- https://github.com/moby/hyperkit/pull/313
- https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
- https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948
- https://github.com/moby/hyperkit/pull/313
- https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
Products affected by CVE-2021-32845
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cpe:2.3:a:mobyproject:hyperkit:-
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cpe:2.3:a:mobyproject:hyperkit:0.20170214
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cpe:2.3:a:mobyproject:hyperkit:0.20170227
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cpe:2.3:a:mobyproject:hyperkit:0.20170425
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cpe:2.3:a:mobyproject:hyperkit:0.20170511
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cpe:2.3:a:mobyproject:hyperkit:0.20170519
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cpe:2.3:a:mobyproject:hyperkit:0.20170904
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cpe:2.3:a:mobyproject:hyperkit:0.20171020
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cpe:2.3:a:mobyproject:hyperkit:0.20171204
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cpe:2.3:a:mobyproject:hyperkit:0.20180123
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cpe:2.3:a:mobyproject:hyperkit:0.20180223
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cpe:2.3:a:mobyproject:hyperkit:0.20180403
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cpe:2.3:a:mobyproject:hyperkit:0.20180621
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cpe:2.3:a:mobyproject:hyperkit:0.20190201
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cpe:2.3:a:mobyproject:hyperkit:0.20190802
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cpe:2.3:a:mobyproject:hyperkit:0.20200224
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cpe:2.3:a:mobyproject:hyperkit:0.20200908
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cpe:2.3:a:mobyproject:hyperkit:0.20210107