Microsoft Windows Kernel - 'win32k!OffsetChildren' Null Pointer Dereference

Author: Nils Sommer
type: dos
platform: windows
port: 
date_added: 2015-12-17 
date_updated: 2015-12-17 
verified: 1 
codes: CVE-2015-6171;OSVDB-131350 
tags: 
aliases:  
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Source: https://code.google.com/p/google-security-research/issues/detail?id=544

The attached PoC triggers a null pointer vulnerability in OffsetChildren on Windows 7 32-bit. By mapping the null page an attacker can leverage this vulnerability to write to an arbitrary address.
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Proof of Concept:
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39025.zip