CVE-2021-32846

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107, function `pci_vtsock_proc_tx` in `virtio-sock` can lead to to uninitialized memory use. In this situation, there is a check for the return value to be less or equal to `VTSOCK_MAXSEGS`, but that check is not sufficient because the function can return `-1` if it finds an error it cannot recover from. Moreover, the negative return value will be used by `iovec_pull` in a while condition that can further lead to more corruption because the function is not designed to handle a negative `iov_len`. 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 af5eba2360a7351c08dfd9767d9be863a50ebaba.

CVSS v3.0 7.8 HIGH

7.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/moby/hyperkit/commit/af5eba2360a7351c08dfd9767d9be863a50ebaba	Patch
https://github.com/moby/hyperkit/pull/313	Patch
https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:mobyproject:hyperkit:*:*:*:*:*:*:*:*

Information

Published : 2023-02-17 15:15

Updated : 2023-02-28 12:28

NVD link : CVE-2021-32846

Mitre link : CVE-2021-32846

JSON object : View

CWE

CWE-908

Use of Uninitialized Resource

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Products Affected

mobyproject

hyperkit

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