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zdiBruno PUJOS (@brunopujos) from REverse TacticsZDI-22-1077
HistoryAug 18, 2022 - 12:00 a.m.

(Pwn2Own) Microsoft Windows win32kbase Use-After-Free Privilege Escalation Vulnerability

2022-08-1800:00:00
Bruno PUJOS (@brunopujos) from REverse Tactics
www.zerodayinitiative.com
23

0.001 Low

EPSS

Percentile

25.4%

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 win32kbase.sys driver. 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 arbitrary code in the context of SYSTEM.