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Microsoft Windows Vulnerabilities

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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

Blog Post

Reverse Engineering

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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Reverse Engineering

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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reverse-engineer

Blog Post

Microsoft Windows Vulnerabilities

Automating CVE-2019-1436 Variant Analysis: An Intro to Detecting Information Leaks via IDAPython

After investigating an information leak within Windows 10 in more detail, we decided to see how feasible it would be for an attacker to create an IDAPython script that could discover CVE-2019-1436 and other similar memory leaks automatically.

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Access Controls Named Pipes

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Windows Interprocess Communications (IPC)

Part II: Analysis of a Vulnerable Microsoft Windows Named Pipe Application

In part II of this three-part series, we dive deeper into hands on examples of identifying usage of named pipe servers within applications using a custom vulnerable application. The methods covered to achieve this goal is through usage of both dynamic and static analysis.

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4 Fundamentals of Microsoft Windows Pipes

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Windows Interprocess Communications (IPC)

Part I: The Fundamentals of Windows Named Pipes

In this three-part blog series, we will discuss the mechanics of Windows pipes and how they can be abused by attackers to gain privileged access.

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

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N-Day Vulnerabilities and Exploits

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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Waves Maxx Audio DLL Side-Loading LPE via Windows Registry

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Exploit Development

Waves Maxx Audio DLL Side-Loading LPE via Windows Registry

When performing vulnerability research, it is essential to make sure that all attack vectors concerning exploitation are exhausted. One avenue of exploitation comes from the Windows registry.

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Microsoft BlueKeep Vulnerability

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Exploitation of Vulnerabilities

Microsoft Windows Remote Code Execution (RCE) Vulnerability: BlueKeep

On June 17, 2019 the Department of Homeland Security (DHS) issued an alert for the Microsoft Windows Remote Code Execution (RCE) vulnerability named BlueKeep and CVE-2019-0708.

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Microsoft Outlook for Android Vulnerable to Cross-Site Scripting

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Security Vulnerabilities

Microsoft Outlook for Android Vulnerable to Cross-Site Scripting

Microsoft published an advisory on a critical vulnerability found in the Microsoft Outlook Android application. The attack happens when an email is sent to the victim with an embedded hidden code.

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