Vulnerability Monitor

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CVE-2020-24718

bhyve, as used in FreeBSD through 12.1 and illumos (e.g., OmniOS CE through r151034 and OpenIndiana through Hipster 2020.04), does not properly restrict VMCS and VMCB read/write operations, as demonstrated by a root user in a container on an Intel system, who can gain privileges by modifying VMCS_HOST_RIP.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.2, requiring local system access to exploit with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 4 products from freebsd, from omniosce, from openindiana and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-09-25T04:23:04.683

Last Modified

2024-11-21T05:15:57.703

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.2 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-862

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	freebsd	freebsd	≤ 11.2	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.3	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	11.4	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.0	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	freebsd	freebsd	12.1	Yes
Operating System	omniosce	omnios	≤ r151034	Yes
Operating System	openindiana	openindiana	≤ hipster_2020.04	Yes
Application	netapp	clustered_data_ontap	-	Yes

References

https://github.com/illumos/illumos-gate/blob/84971882a96ac0fecd538b02208054a872ff8af3/usr/src/uts/i86pc/io/vmm/intel/vmcs.c#L246-L249 Exploit, Third Party Advisory ([email protected])
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:28.bhyve_vmcs.asc Vendor Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20201016-0002/ Third Party Advisory ([email protected])
https://github.com/illumos/illumos-gate/blob/84971882a96ac0fecd538b02208054a872ff8af3/usr/src/uts/i86pc/io/vmm/intel/vmcs.c#L246-L249 Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:28.bhyve_vmcs.asc Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20201016-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For freebsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.