by Kastro
Paper/Archive/CVE-2021-21994

CVE-2021-21994

vmware — SFCB (Small Footprint CIM Broker) as used in ESXi has an authentication bypass vulnerability.

EPSS 1%CVSS 9.8
critical.is priorityof 100
43
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 67.4.674 × 2013.5No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

SFCB (Small Footprint CIM Broker) as used in ESXi has an authentication bypass vulnerability. A malicious actor with network access to port 5989 on ESXi may exploit this issue to bypass SFCB authentication by sending a specially crafted request.

Affected

ProductAffectedFixed inSource
VMware ESXi and VMware Cloud FoundationVMware ESXi(7.0 before ESXi70U2-17630552, 6.7 before ESXi670-202103101-SG, 6.5 before ESXi650-202107401-SG) and VMware Cloud Foundation (4.x, 3.x before 3.10.2)–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refvmware.com/security/advisories/VMSA-2021-0014.html