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GitHub_MCVELIST:CVE-2021-32847

HistoryFeb 20, 2023 - 12:00 a.m.

CVE-2021-32847 Moby HyperKit uninitialized memory use in virtio-sock pci_vtsock_proc_tx

2023-02-2000:00:00

CWE-125

GitHub_M

www.cve.org

hyperkit vulnerability

uninitialized memory use

virtio-sock

disclosure of host memory

CVSS3

7.1

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

20.7%

JSON

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior, a malicious guest can trigger a vulnerability in the host by abusing the disk driver that may lead to the disclosure of the host memory into the virtualized guest. This issue is fixed in commit cf60095a4d8c3cb2e182a14415467afd356e982f.

CNA Affected

[
  {
    "vendor": "moby",
    "product": "hyperkit",
    "versions": [
      {
        "version": "0.20210107",
        "status": "affected",
        "lessThanOrEqual": "0.20210107",
        "versionType": "custom"
      }
    ]
  }
]

References

github.com/moby/hyperkit/blob/2f061e447e1435cdf1b9eda364cea6414f2c606b/src/lib/pci_virtio_block.c#L316

github.com/moby/hyperkit/commit/cf60095a4d8c3cb2e182a14415467afd356e982f

securitylab.github.com/advisories/GHSL-2021-058-moby-hyperkit/

CVSS3

7.1

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

AI Score

6.8

Confidence

High

EPSS

0.001

Percentile

20.7%

JSON

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