(Pwn2Own) Microsoft Windows UnserializePropertySet Privilege Context Switching Error Local Privilege Escalation Vulnerability

June 12th, 2024
ZDI-24-604 ZDI-CAN-23788

CVE ID

CVE-2024-35250

CVSS Score

8.8 AV:L/AC:L/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.

The specific flaw exists within the UnserializePropertySet function. The issue results from improper handling of privilege context transitions. 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-2024-35250

Disclosure Timeline

  • 2024-03-28 - Vulnerability reported to vendor
  • 2024-06-12 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated

Credit

Angelboy (@scwuaptx) from DEVCORE Research Team

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