Known Exploited Vulnerabilities CVE-2021-21973 Mappings

The vSphere Client (HTML5) contains an SSRF (Server Side Request Forgery) vulnerability due to improper validation of URLs in a vCenter Server plugin. A malicious actor with network access to port 443 may exploit this issue by sending a POST request to vCenter Server plugin leading to information disclosure. This affects: VMware vCenter Server (7.x before 7.0 U1c, 6.7 before 6.7 U3l and 6.5 before 6.5 U3n) and VMware Cloud Foundation (4.x before 4.2 and 3.x before 3.10.1.2).

Mappings

Capability ID Capability Description Mapping Type ATT&CK ID ATT&CK Name Notes
CVE-2021-21973 VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability primary_impact T1046 Network Service Discovery
Comments
This vulnerability is exploited through an SSRF (Server Side Request Forgery) flaw in the vSphere Client (HTML5) of VMware's vCenter Server, affecting the vCenter Server plugin. Attackers leverage this vulnerability to gain unauthorized access by sending a crafted POST request to the vCenter Server plugin, thereby bypassing URL validation. This manipulation enables the disclosure of sensitive information. By exploiting this flaw, attackers can scan the company's internal network and retrieve specifics about open ports and services.
References
CVE-2021-21973 VMware vCenter Server and Cloud Foundation Server Side Request Forgery (SSRF) Vulnerability exploitation_technique T1190 Exploit Public-Facing Application
Comments
This vulnerability is exploited through an SSRF (Server Side Request Forgery) flaw in the vSphere Client (HTML5) of VMware's vCenter Server, affecting the vCenter Server plugin. Attackers leverage this vulnerability to gain unauthorized access by sending a crafted POST request to the vCenter Server plugin, thereby bypassing URL validation. This manipulation enables the disclosure of sensitive information. By exploiting this flaw, attackers can scan the company's internal network and retrieve specifics about open ports and services.
References