CVE-2021-32845

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Source

https://nvd.nist.gov/vuln/detail/CVE-2021-32845

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-32845.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2021-32845

Published

2023-02-17T23:15:11Z

Modified

2025-10-15T13:03:18.289894Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

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.

References

Affected packages

Git / github.com/moby/hyperkit

Affected ranges

Type: GIT
Repo: https://github.com/moby/hyperkit
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

41272a980197917df8e58ff90642d14dec8fe948

Affected versions

v0.*

v0.20170214

v0.20170227

v0.20170425

v0.20170511

v0.20170519

v0.20170904

v0.20171020

v0.20171204

v0.20180123

v0.20180223

v0.20180403

v0.20180621

v0.20190201

v0.20190802

v0.20200224

v0.20200908

v0.20210107

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948",
        "signature_type": "Function",
        "digest": {
            "function_hash": "310043126656173523047379725801967880239",
            "length": 495.0
        },
        "target": {
            "function": "pci_vtrnd_notify",
            "file": "src/lib/pci_virtio_rnd.c"
        },
        "id": "CVE-2021-32845-61f7972e"
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "source": "https://github.com/moby/hyperkit/commit/41272a980197917df8e58ff90642d14dec8fe948",
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "313427961420582974340249393305992632339",
                "206001336668488359012814060866514161300",
                "256515945538833497297681925219737940193",
                "18215666424238618820492140631593916169",
                "216513535212053987493370348725693915922",
                "755233976114824510165496030115338788",
                "80441343336273934510724666271259445792",
                "339653611464416608273907080567137430736"
            ]
        },
        "target": {
            "file": "src/lib/pci_virtio_rnd.c"
        },
        "id": "CVE-2021-32845-ef690adc"
    }
]