Multiple vulnerabilities in VMware ESXi, Workstation, Fusion and NSX-T were privately reported to VMware. Updates are available to remediate these vulnerabilities in affected VMware products.
ESXi OpenSLP remote code execution vulnerability (CVE-2020-3992)
OpenSLP as used in ESXi has a critical use-after-free issue. A malicious actor residing in the management network who has access to port 427 on an ESXi machine may be able to trigger a use-after-free in the OpenSLP service resulting in remote code execution.
NSX-T MITM vulnerability (CVE-2020-3993)
VMware NSX-T contains a security vulnerability that exists in the way it allows a KVM host to download and install packages from NSX manager. Severity of this vulnerability is medium. A malicious actor with MITM positioning may be able to exploit this issue to compromise the transport node.
TOCTOU out-of-bounds read vulnerability (CVE-2020-3981)
VMware ESXi, Workstation and Fusion contain an out-of-bounds read vulnerability due to a time-of-check time-of-use issue in ACPI device. A malicious actor with administrative access to a virtual machine may be able to exploit this issue to leak memory from the vmx process.
TOCTOU out-of-bounds write vulnerability (CVE-2020-3982)
VMware ESXi, Workstation and Fusion contain an out-of-bounds write vulnerability due to a time-of-check time-of-use issue in ACPI device. A malicious actor with administrative access to a virtual machine may be able to exploit this vulnerability to crash the virtual machine’s vmx process or corrupt hypervisor’s memory heap.
vCenter Server session hijack vulnerability in update function (CVE-2020-3994)
VMware vCenter Server contains a session hijack vulnerability in the vCenter Server Appliance Management Interface update function due to a lack of certificate validation. A malicious actor with network positioning between vCenter Server and an update repository may be able to perform a session hijack when the vCenter Server Appliance Management Interface is used to download vCenter updates.
VMCI host driver memory leak vulnerability (CVE-2020-3995)
The VMCI host drivers used by VMware hypervisors contain a memory leak vulnerability. A malicious actor with access to a virtual machine may be able to trigger a memory leak issue resulting in memory resource exhaustion on the hypervisor if the attack is sustained for extended periods of time.
Workarounds and fixed versions are listed in the vendor’s advisory.