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CVE
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CVE-2020-24718Date: (C)2020-09-25   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 8.2CVSS Score : 7.2
Exploit Score: 1.5Exploit Score: 3.9
Impact Score: 6.0Impact Score: 10.0
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: HIGHAuthentication: NONE
User Interaction: NONEConfidentiality: COMPLETE
Scope: CHANGEDIntegrity: COMPLETE
Confidentiality: HIGHAvailability: COMPLETE
Integrity: HIGH 
Availability: HIGH 
  
Reference:
https://github.com/illumos/illumos-gate/blob/84971882a96ac0fecd538b02208054a872ff8af3/usr/src/uts/i86pc/io/vmm/intel/vmcs.c#L246-L249
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:28.bhyve_vmcs.asc
https://security.netapp.com/advisory/ntap-20201016-0002/

CPE    3
cpe:/o:freebsd:freebsd
cpe:/o:freebsd:freebsd:11.4:rc1
cpe:/o:freebsd:freebsd:11.4:rc2
CWE    1
CWE-862

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