VMware vCenter Exploit - CVE-2021-22006

VMware vCenter Server enables the management of virtual environments for Windows and Linux hosts. The Analytics service in vCenter has a vulnerability that allows an unauthenticated attacker to bypass a proxy and access restricted endpoints on port 443. The attacker sends unauthenticated web requests where the URI contains a path traversal fragment (such as ../ or %252E%252E%252F), the restricted endpoint path (/analytics/ph/api/dataapp/agent), and a malicious web shell (1). The vulnerable vCenter sends a response to indicate that the malicious POST request was accepted (2). The attacker can now run commands on the compromised server by making additional requests to the web shell on the server.