Critical VMware Flaw Let Attackers to Hack VMware vCenter Server

VMware patches a critical security vulnerability that allows malicious attackers to obtain sensitive information.

The vulnerability can be tracked as CVE-2020-3952, it is rated as critical and receives a CVSSv3 score of 10.

VMware vCenter Server Vulnerability

The vulnerability resides in the VMware Directory Service (vmdir) which is a part of vCenter Server version 6.7 on Windows and virtual appliances.

In certain conditions, the vmdir does not implement proper security controls, which allows attackers with network access to access sensitive information.

By using the accessed information attacker can compromise vCenter Server or other services that depend on vmdir for authentication.

If you are using vCenter Server version 6.7, it is recommended to update with 6.7u3f to fix the critical vulnerability.

Product	Version	Platform	Affected	Fixed	Additional Documentation
vCenter Server	6.7	Virtual Appliance	Yes	6.7u3f	KB78543
vCenter Server	6.7	Windows	Yes	6.7u3f	KB78543

Here is the example log to check with affected deployments.

2020-04-06T17:50:41.860526+00:00 info vmdird t@139910871058176: ACL MODE: Legacy

VMware also mentioned that “Clean installations of vCenter Server 6.7 (embedded or external PSC) are not affected.”

In March VMware address high severity privilege escalation and DoS in the Workstation, Fusion, VMware Remote Console and Horizon Client.

VMware also published KB article 78543 for more details if a vCenter Server 6.7 deployment is affected.