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Rewterz Threat Advisory – VMWare Multiple Vulnerabilities

Severity

High

Analysis Summary

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.

Impact

  • Remote Code Execution
  • Privilege Abuse
  • Memory Leakage
  • Session Hijacking

Affected Vendors

VMware

Affected Products

  • VMware ESXi
  • VMware Workstation Pro / Player (Workstation)
  • VMware Fusion Pro / Fusion (Fusion)
  • NSX-T
  • VMware Cloud Foundation

Remediation

Workarounds and fixed versions are listed in the vendor’s advisory. 

https://www.vmware.com/security/advisories/VMSA-2020-0023.html