CVE-2020-24718

high-risk
Published 2020-09-25

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.

Do I need to act?

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0.10% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.2/10 High
LOCAL / LOW complexity

Affected Products (20)

Affected Vendors

Freebsd Netapp Omniosce Openindiana

References (6)

Exploit https://github.com/illumos/illumos-gate/blob/84971882a96ac0fecd538b02208054a872f...
Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-20:28.bhyve_vmcs.asc
Third Party Advisory https://security.netapp.com/advisory/ntap-20201016-0002/
Exploit https://github.com/illumos/illumos-gate/blob/84971882a96ac0fecd538b02208054a872f...
Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-20:28.bhyve_vmcs.asc
Third Party Advisory https://security.netapp.com/advisory/ntap-20201016-0002/
50
/ 100
high-risk
Severity 25/34 · High
Exploitability 0/34 · Minimal
Exposure 25/34 · High