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zdiLucas Leong (@_wmliang_) of Trend Micro's Zero Day InitiativeZDI-20-1434
HistoryDec 15, 2020 - 12:00 a.m.

(0Day) Microsoft Windows splwow64 Untrusted Pointer Dereference Information Disclosure Vulnerability

Lucas Leong (@_wmliang_) of Trend Micro's Zero Day Initiative

0.001 Low




This vulnerability allows local attackers to disclose sensitive information 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 user-mode printer driver host process splwow64.exe. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges from low integrity and execute code in the context of the current user at medium integrity.