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K
zdiMarcin WiazowskiZDI-19-868
HistoryOct 10, 2019 - 12:00 a.m.

Microsoft Windows CreateSurfacePal Out-Of-Bounds Write Privilege Escalation Vulnerability

2019-10-1000:00:00
Marcin Wiazowski
www.zerodayinitiative.com
17

0.001 Low

EPSS

Percentile

41.5%

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 CreateSurfacePal function in win32k.sys. The issue results from the lack of proper validation of user-supplied data, which can result in a write outside the bounds of an allocated array. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of SYSTEM.