A Deep Dive into the GetProcessHandleFromHwnd API

Posted by James Forshaw In my previous blog post I mentioned the GetProcessHandleFromHwnd API. This was an API I didn’t know existed until I found a publicly disclosed UAC bypass using the Quick Assist UI Access application. This API looked interesting so I thought I should take a closer look. I...

CVE-2025-6759: Citrix Virtual Apps and Desktops - Local Privilege Escalation (FIXED)

Overview During a Virtual Desktop Infrastructure VDI breakout assessment, Rapid7 identified a Local Privilege Escalation LPE vulnerability affecting Citrix Virtual Apps and Desktops. This issue was assigned CVE-2025-6759 and has a CVSS score of 7.3 High. Rapid7 observed a SYSTEM process handle wi...

PT-2025-28651 · Citrix · Citrix Virtual Apps/Desktops

Name of the Vulnerable Software and Affected Versions: Citrix Windows Virtual Delivery Agent versions prior to 2503 Citrix Windows Virtual Delivery Agent 2402 LTSR versions through CU2 Citrix Windows Virtual Delivery Agent 2203 LTSR version is not affected Description: A local privilege escalatio...

PT-2024-30630 · Imagination Technologies · Powervr

Name of the Vulnerable Software and Affected Versions: PowerVR affected versions not specified Description: The issue allows software installed and run as a non-privileged user to conduct improper GPU system calls, potentially gaining access to the graphics buffers of a parent process. This is...

PPLBlade - Protected Process Dumper Tool

Protected Process Dumper Tool that support obfuscating memory dump and transferring it on remote workstations without dropping it onto the disk. Key functionalities : 1. Bypassing PPL protection 2. Obfuscating memory dump files to evade Defender signature-based detection mechanisms 3. Uploading...

Microsoft Windows 10 1809 - LUAFV Delayed Virtualization Cross Process Handle Duplication Privilege Escalation

Windows: LUAFV Delayed Virtualization Cross Process Handle Duplication EoP Platform: Windows 10 1809 not tested earlier Class: Elevation of Privilege Security Boundary per Windows Security Service Criteria: User boundary Summary: The LUAFV driver doesn’t take into account a virtualized handle bei...

CVE-2017-9769

A specially crafted IOCTL can be issued to the rzpnk.sys driver in Razer Synapse 2.20.15.1104 that is forwarded to ZwOpenProcess allowing a handle to be opened to an arbitrary process...

CVE-2017-9769

CVE-2017-9769 affects Razer Synapse, where a crafted IOCTL sent to the rzpnk.sys driver is forwarded to ZwOpenProcess, allowing opening a handle to an arbitrary process and enabling local privilege escalation. Public materials describe reading/writing memory and potential code execution via a hoo...

CVE-2017-9769

A specially crafted IOCTL can be issued to the rzpnk.sys driver in Razer Synapse 2.20.15.1104 that is forwarded to ZwOpenProcess allowing a handle to be opened to an arbitrary process. Recent assessments: zeroSteiner at November 21, 2019 11:14pm UTC reported: Analysis The Razer rzpnk.sys driver...