Advisory Details

March 12th, 2020

Microsoft Windows Printer Device Context Use-After-Free Privilege Escalation Vulnerability

ZDI-20-283
ZDI-CAN-9875

CVE ID CVE-2020-0887
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 surface objects during print jobs. 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-2020-0887
DISCLOSURE TIMELINE
  • 2019-12-26 - Vulnerability reported to vendor
  • 2020-03-12 - Coordinated public release of advisory
CREDIT CodeUmbra
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