Advisory Details

June 14th, 2019

Microsoft Windows DirectComposition PropertySet Race Condition Privilege Escalation Vulnerability

ZDI-19-571
ZDI-CAN-8371

CVE ID CVE-2019-1065
CVSS SCORE 7.8, (AV:L/AC:L/PR:L/UI:N/S:U/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 DirectComposition PropertySet objects in the kernel. The issue results from a failure to guard critical data from being modified while the kernel is performing an operation, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.

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-2019-1065
DISCLOSURE TIMELINE
  • 2019-06-13 - Vulnerability reported to vendor
  • 2019-06-14 - Coordinated public release of advisory
CREDIT fluoroacetate (@fluoroacetate)
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