Advisory Details

September 15th, 2020

VMware Workstation ThinPrint EMF Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-20-1179
ZDI-CAN-11065

CVE ID CVE-2020-3986
CVSS SCORE 6.5, (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)
AFFECTED VENDORS VMware
AFFECTED PRODUCTS Workstation
VULNERABILITY DETAILS

This vulnerability allows local attackers to disclose sensitive information on affected installations of VMware Workstation. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability.

The specific flaw exists within the parsing of EMF files in the ThinPrint component. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute code in the context of the hypervisor.

ADDITIONAL DETAILS VMware has issued an update to correct this vulnerability. More details can be found at:
https://www.vmware.com/security/advisories/VMSA-2020-0020.html
DISCLOSURE TIMELINE
  • 2020-05-12 - Vulnerability reported to vendor
  • 2020-09-15 - Coordinated public release of advisory
  • 2020-09-15 - Advisory Updated
CREDIT KPC of Trend Micro Zero Day Initiative
BACK TO ADVISORIES