Advisory Details

October 11th, 2023

Microsoft Windows UMPDDrvStretchBltROP Type Confusion Local Privilege Escalation Vulnerability

ZDI-23-1549
ZDI-CAN-21251

CVE ID CVE-2023-36594
CVSS SCORE 7.8, AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. Additionally, the target system must have multiple active monitors.

The specific flaw exists within the UMPDDrvStretchBltROP function in the win32kfull driver. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36594
DISCLOSURE TIMELINE
  • 2023-06-29 - Vulnerability reported to vendor
  • 2023-10-11 - Coordinated public release of advisory
CREDIT Marcin Wiazowski
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