GitHub_MCVELIST:CVE-2021-32845CVE-2021-32845 Moby HyperKit uninitialized memory use vtrnd pci_vtrnd_notify
7.7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
7.4 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%
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.
CNA Affected
[
{
"vendor": "moby",
"product": "hyperkit",
"versions": [
{
"version": "0.20210107",
"status": "affected",
"lessThanOrEqual": "0.20210107",
"versionType": "custom"
}
]
}
]Related
7.7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
7.4 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
5.1%