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
EPSS
Percentile
13.2%
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.
[
{
"vendor": "moby",
"product": "hyperkit",
"versions": [
{
"version": "0.20210107",
"status": "affected",
"lessThanOrEqual": "0.20210107",
"versionType": "custom"
}
]
}
]