Advisory Details

May 1st, 2023

(Pwn2Own) VMware Workstation UHCI Component Stack-based Buffer Overflow Local Privilege Escalation Vulnerability

ZDI-23-522
ZDI-CAN-20773

CVE ID CVE-2023-20869
CVSS SCORE 8.2, AV:L/AC:L/PR:H/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 high-privileged code on the target guest system in order to exploit this vulnerability.

The specific flaw exists within the UHCI component. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary 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-2023-0008.html
DISCLOSURE TIMELINE
  • 2023-03-30 - Vulnerability reported to vendor
  • 2023-05-01 - Coordinated public release of advisory
CREDIT Nguyễn Hoàng Thạch (@hi_im_d4rkn3ss) of STAR Labs SG Pte. Ltd.
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