Auth bypass in FreeBSD
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.
Vulnerability class: Broken Access Control
EPSS: 0.006 (46.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Freebsd — versions 11.3, 11.4, 12.0
- Netapp Clustered_data_ontap
- Omniosce Omnios
- Openindiana
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-24718?
- CVE-2020-24718 is a high-severity vulnerability in FreeBSD, classified under Missing Authorization. CVSS score: 8.2/10. Published 2020-09-25.
- How severe is CVE-2020-24718?
- High severity. CVSS v3 base score is 8.2 out of 10.