Advisory Details

June 9th, 2020

Microsoft Windows win32kfull PDEVOBJ Use-After-Free Privilege Escalation Vulnerability

ZDI-20-692
ZDI-CAN-10033

CVE ID CVE-2020-1207
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 handling of palette objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1207
DISCLOSURE TIMELINE
  • 2020-02-11 - Vulnerability reported to vendor
  • 2020-06-09 - Coordinated public release of advisory
CREDIT Marcin Wiazowski
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