Microsoft Security Design Active X Controls
Building ActiveX Controls for Internet Explorer This article covers features of Windows Internet Explorer that a developer writing ActiveX Controls should take into account when targeting Internet Explorer as a container. Can this control host mobile code or script? South Korea has started to remove this technology from their public websites in order to make their web site accessible to more platforms. Microsoft dropped ActiveX support from the Windows Store When the user encounters a Web page with a disabled ActiveX control, they will see an Information bar with the following text: "This website wants to run the following add-on "ABC http://technologyprometheus.com/microsoft-security/eset-smart-security-vs-microsoft-security-essentials.html
It is also standard practice to use colors to represent the trust level of specific items. There are two behaviors based on the presence of VBA projects. You should think about how you can restrict functionality to prevent others from repurposing your control to possibly malicious ends. For most controls you will want to use a combination of dumb and smart fuzz testing and generate some of the test data while also mutating other data.
Are globally unique identifiers (GUIDs) used to track users? Dumb data generation, similar to black box testing, generates input without knowledge of the intended data format or processing functions. Call the ICatRegister::UnRegisterClassImplCategories method, passing the control's CLSID and the requisite category ID as arguments. Per-Site ActiveX Controls Internet Explorer 8 allows greater control of where and under what context ActiveX controls can run.
Published 05/5/13 DID YOU KNOW?The large clusters bananas grow in are known as "hands." BEST OF HOW-TO GEEK How to Find and Remove Duplicate Files on Windows What’s the Best Antivirus If so, where does the code or script come from? However, allowing ActiveX Controls to be accessed from scripts raises several new security issues. Do not assume that your control is secure until it has gone through a rigorous security review.
Tampering is the modification of data within the system to achieve a malicious goal. The data accessed could potentially violate the privacy of the user. Go to the Tools menu, choose Internet Options, then Advanced tab, and then select Enable memory protection to help mitigate online attacks. (Note: If you are running on Windows Vista, Internet The first method uses the Component Categories Manager to create the appropriate entries in the system registry.
Supporting Offline Browsing in Applications and Components This article describes the API elements that enable third-party developers to hook into the offline browsing architecture. Digitally signing controls is a vital step if you want users to be able to easily install your control. If Internet Explorer determines that your control supports IObjectSafety, it calls the IObjectSafety::SetInterfaceSafetyOptions method prior to loading your control in order to determine whether your control is safe for scripting. Standard Internet-Aware Objects As a benefit to control developers, Microsoft will supply Internet-aware picture, sound, and video objects that will make dealing with these data formats in the Internet environment a
As the author of an ActiveX control, you need to be vigilant. check these guys out Call the ICatRegister::RegisterClassImplCategories method, passing the control's class identifier (CLSID) and the requisite category ID as arguments. The following excerpt is taken from a sample control that supports both safe initialization and safe scripting. APSEC 2000.
Dev centers Windows Office Visual Studio Microsoft Azure More... this contact form A site-locking template that uses Microsoft Active Template Library (ATL) is available: SiteLock 1.14 Template for ActiveX Controls. The browser can then refuse to load the control, or it can put up a dialog box, asking the user if the operation should be permitted. Because it is a Component Object Model (COM) object, it can do anything the user can do from that computer.
Designing Secure ActiveX Controls Any ActiveX control should be conceived and designed with security in mind. If your control writes data to the local computer, or in any way changes the state or behavior of the system, take time to consider how your control might be abused Dev centers Windows Office Visual Studio Microsoft Azure More... have a peek here Archived Content Internet Explorer Articles and Columns Exploring Internet Explorer Column Exploring Internet Explorer Column ActiveX Security: Improvements and Best Practices ActiveX Security: Improvements and Best Practices ActiveX Security: Improvements and
See About URL Security Zones Templates for more information.) When the user attempts to display a page containing a control that does not guarantee safe initialization or scripting, Internet Explorer does
Does this data type have its own security implementation? Copyright © 2006-2016 How-To Geek, LLC All Rights Reserved
Prompt me before enabling all controls with minimal restrictions This is the default. Never assume that a certain input conforms to certain requirements. Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! Check This Out You have a responsibility to users to provide the most secure controls.
In this version of Internet Explorer, ActiveX controls that are embedded as Web objects are presented to the user as add-ons. Where might there be buffer overruns? For more information, see Security and ActiveX controls overview. Examples of ActiveX controls include the browser plug-ins for Apple QuickTime, Adobe Reader, and Real Network RealPlayer.
ActiveX Opt-In - What's New in IE7 for ActiveX ActiveX controls are very important to the Internet because they allow developers to enhance Web pages with additional software application features that Once your code is compatible with DEP, you should link your code with /NXCOMPAT. Under Microsoft Office PowerPoint Trust Center, click Trust Center Settings. DEP is available on Microsoft Windows 2003 Server SP1, Windows XP Service Pack 2, Windows XP Tablet PC Edition 2005, and on Windows Vista.
The following example shows how these steps were accomplished and combined into a single function named UnRegisterCLSIDInCategory in a sample control. There are two behaviors based on the presence of VBA projects. The following questions are designed to help you think about the security of your control. From the local computer to the Internet?
What are you doing to stop an extraneous Web site from invoking the control? Digitally Sign your Control A digital signature on your control enables users to verify the control's publisher and ensures that it has not been tampered with since being published. Cross-site scripting flaws and man-in-the-middle attacks could expose your control to other Web sites. In the Page Editor Options dialog box, click the General tab.
Using these conventions places some logical constraints on your diagram. You’ll be auto redirected in 1 second. For information, recommendations, and guidance regarding the current version of Internet Explorer, see IE Developer Center. If the control performs actions that are inherently unsafe, such as exposing or deleting private data (and many useful controls, such as tools for system configuration are inherently unsafe), then the
Scripting errors occur if user attempts to view page and execute script. Note Most control developers set their Internet Explorer security level to Low during the early stages of control See Preventing Repurposing for more information. They are not software specific.