CVE-2021-32846
Assigner: GitHub_M
Published: 2023-02-17T00:00:00
State: PUBLISHED
title: Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx
descriptions: value: 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.
affected: vendor: moby
product: hyperkit
versions: version: 0.20210107
status: affected
lessThanOrEqual: 0.20210107
versionType: custom
metrics: cvssV3_1: version: 3.1
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: HIGH
baseScore: 7.7
baseSeverity: HIGH
problemTypes: descriptions: type: CWE
description: CWE-908 Use of Uninitialized Resource
cweId: CWE-908
x_generator: engine: Vulnogram 0.0.9
source: advisory: GHSL-2021-057
defect: GHSL-2021-057
discovery: UNKNOWN