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N-Day Vulnerabilities and Exploits

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Reverse engineering undocumented structures,undocumented structures, ESTROBJ Windows 10 x64, STROBJ Windows 10 x64, STROBJ, ESTROBJ, _ESTROBJ, _STROBJ, STROBJ Windows 10, ESTROBJ Windows 10

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Undocumented Structures

Reversing Stories: Updating the Undocumented ESTROBJ and STROBJ Structures for Windows 10 x64

Have you ever come across undocumented Windows structures that need to be reverse-engineered in order to perform a vulnerability analysis? In this post, we will demonstrate how to update these using IDA Pro and HexRays Decompiler for the ESTROBJ and STROBJ structures on Windows 10 x64.

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windows-vulnerability-windows-kernel

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N-Day Vulnerabilities and Exploits

Investigating Microsoft Windows Vulnerability CVE-2019-1169

VerSprite recently investigated CVE-2019-1169, a NULL pointer dereference vulnerability in win32k.sys that Microsoft fixed in the August 2019 patch update. This led to the creation of a working exploit which can successfully leak data from arbitrary kernel addresses on affected Windows 7 machines.

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VerSprite Uncovers Silently Patched Information Leak Within Win32k Affecting Windows 10 v1709 to v1903

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Security Vulnerabilities

Analyzing CVE-2019-1436 on Windows 10 v1903

VerSprite’s Research team uncovers silently patched information leak within Win32k Windows 10 v1709 to v1903. Exploitation of this vulnerability allows attackers to leak the value of win32kbase!gahDpiDepDefaultGuiFonts. Read the N-Day vulnerability and exploit analysis here.

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