![]() ![]() There are a few rough edges like the Alt+Tab shortcut stopped worked after running Microsoft Desktops but that should be fixed pretty soon considering that the hard-working Sysinternals team are releasing updates for other utilities so frequently. Microsoft has long offered virtual desktop manager as an XP Power toy but the newer one is very light and also compatible with Windows Vista. And you can very easily switch from one virtual desktop to another by pressing the keyboard shortcut or through your mouse. The software runs in your Windows taskbar. This makes life less confusing when you have dozens of programs running simultaneously on the desktop. Since everyone’s attention is focused on the kernel side, the user-mode code is rarely been audited.The Sysinternals team at Microsoft today released another useful software utility for Windows called Desktops to help people who run multiple applications at the same time.ĭesktops (v1.0) is a Virtual Desktop Manager that lets you create up to four different desktop screens for arranging all those open applications in a more logical and productive manner.įor instance, you could put all work related programs in the first desktop window, chat programs in another virtual window and so on. Audience will know the details of the vulnerabilities, the rootcause of these bugs, most of these vulnerabilities exist in dwmcore.dll module, many of them are exploitable, and the quality is very high.Some of the bugs can’t found by fuzzer, the audience will know advantages and disadvantages between fuzzers and manual code auditing. ![]() Audience will know how we designed our fuzzer and the vulnerabilities found by the fuzzer. Introduce the two ways that we find these vulnerabilities, manual code auditing + Fuzzing.There are many security issues in the process of shared memory communication. Understanding the details of DirectComposition, including the implementation of user mode and kernel mode, especially how the user process communicates with Desktop Window Manager process.Our presentation will leave attendees with the following takeaways: Step 1: You can either press simultaneously Window + Tab keys or click on Task View icon from your Windows 10 taskbar. CVE-2022-37970: DWM Core Library Injection Data Out Of Bound Access Vulnerability.CVE-2022-23288: DWM Core Library Proxy Object Use After Free Vulnerability.CVE-2022-21994: DWM Core Library Animation Object Type Confusion Vulnerability.CVE-2022-21902: DWM Core Library Animation Object Out Of Bound Access Vulnerability.CVE-2022-21896: DWM Core Library Untrust Pointer Reference Vulnerability.Press Windows key + Tab to bring up the workspaces and drag the application you wish to move to the virtual desktop you wish to move it to. Move Applications Between Workspaces You can move an application from one workspace to another. CVE-2022-21852: DWM Core Library Expression Object Out Of Bound Access Vulnerability You can also press the Windows key + Ctrl + either the left or right arrow at any point.We will use 5 vulnerability cases we found as an explanation. This part is the key content of our speech. Vulnerabilities of DirectComposition UserSpace Finally, we’ll make a conclusion and share our opinions on this attack surface, and also the speculation on the future security of the Desktop Window Manager process. Manage your mobile devices to deploy profiles and policies. We will disclose some vulnerabilities we found, and you will gain a better understanding of this attack surface. As a desktop manager, Endpoint Central supports Windows, Mac and Linux operating systems. We will also introduce some special features found in the DWM process through reverse engineering, such as restart recovery, exception handling, etc. In this talk, we will first introduce the basic architecture of the Desktop Window Manager, and explain how low privileged users interact with the dwm process. We found 10 bugs inside the dwm process, all of these bugs were reported to Microsoft and got acknowledgements. However, there’re not too much research on this attack surface. We found that this process has high privileges, users with low privileges can interact with the DWM process, which create a very large attack surface. Are there still other attack surfaces inside the windows graphics component?ĭesktop Window Manager (DWM.EXE) is the compositing window manager in Microsoft Windows since Windows Vista that enables the use of hardware acceleration to render the graphical user interface of Windows. Even so, it’s still difficult to discover new vulnerabilities inside win32k attack surface. Researchers discovered new attack surfaces such as win32k Callback, DirectX, DirectComposition, etc. In the past few years, Windows win32k privilege escalation vulnerabilities have emerged in an endless stream.
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