Advisory Details

September 15th, 2020

VMware Workstation ThinPrint name Table Integer Overflow Privilege Escalation Vulnerability

ZDI-20-1177
ZDI-CAN-10922

CVE ID CVE-2020-3989
CVSS SCORE 8.8, (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
AFFECTED VENDORS VMware
AFFECTED PRODUCTS Workstation
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges 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 ThinPrint component. Crafted data in the name table of a font file can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability 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
  • 2020-04-30 - Vulnerability reported to vendor
  • 2020-09-15 - Coordinated public release of advisory
CREDIT linhlhq of VinCSS (Member of Vingroup)
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