Compatibility in Internet Explorer 6 for Windows XP Service Pack 2. Microsoft Internet Explorer 6 for Microsoft Windows XP Service Pack 2 (SP2) introduces significant additions and changes to security features. Developers should review this document against their code because applications developed for earlier versions might break. A applications compatibility tool is available that you can run against your applications to help you find out if they will break. For more information, see Windows Client Application Compatibility. This document assumes that you are familiar with Dynamic HTML (DHTML). The following topics are discussed in this document. ![]() Local Machine Zone Lockdown. Before Windows XP SP2, the content on the local file system, aside from that cached by Windows Internet Explorer, was considered to be secure and was assigned to the Local Machine security zone. For more information about security zones, see About URL Security Zones.) This security zone usually allows content to run in Internet Explorer with relatively few restrictions. However, attackers often try to take advantage of the Local Machine zone to elevate privileges and compromise a computer. Windows XP SP2 secures the Local Machine zone by tightening restrictions on several URL actions. In effect, Windows XP SP2 creates a new, locked- down Local Machine zone. ![]() This change does not affect the other security zones (Internet, Restricted sites, Local intranet, and Trusted sites zones). Any time that content attempts one of these actions, a new security user interface (UI) element called the Information Bar displays. The user can click the Information Bar to remove the lockdown from the restricted content. Thee following eleven URL actions are more restrictive in the Lockdown zone than in the usual Local Machine zone. If your Web page runs a Microsoft Active. X control or script, you can add a Mark of the Web (MOTW) comment to the HTML of the page. This Internet Explorer feature forces the HTML file into the security zone of the specified URL so that it can run the script or Active. ![]() An update rollup is available for Internet Explorer 6. All Internet Explorer 6 Service Pack 1. Download information. Internet Explorer 6. Service Pack 3 for Internet Explorer 6 FR. Frarno asked on November 27, 2009. Is there a seperate Service Pack 3 for IE 6 availible? Or is SP 3 for. Security Update for Internet Explorer for. Windows XP Service Pack 2, Windows XP Service Pack 3 This update applies to Internet Explorer 6 with the following. Internet Explorer 6, free and safe download. Alternatives to Internet Explorer 6. Softonic's Choice. internet explorer 9 windows xp service pack 3. ![]() X code in a less restrictive zone. MOTW works in Internet Explorer 4. Use the following comment to insert an MOTW comment into a page whose domain is identified, replacing http: //www. ![]() Internet Explorer 6 6 Service Pack 1 (SP1) License Free Language English Platform windows. Update your Internet Explorer with this inclusive service pack. recently. Service packs help to keep Internet Explorer current, and extend and update the functionality of your computer. Download Security Essentials. Internet explorer 6 service pack 2 free download - Google Toolbar for Internet Explorer. internet explorer 6 service pack 2 free download. Download Internet Explorer 6 latest version. Free Download Safe download Internet Explorer 6 free download. internet explorer 9 windows xp service pack 3. Microsoft Internet Explorer 6 for Microsoft Windows XP Service Pack 2. Internet Explorer displays a download error dialog. Internet Explorer 6 for Windows. Internet Explorer 6 Service Pack 1. Windows 98, and Windows NT 4.0 Service Pack 6a. Total download size for a. Note Internet Explorer 6 SP1 setup. URL of the Internet domain or intranet domain where the page is hosted. Use the following comment when you want to generically insert an MOTW.< !- - saved from url=about: internet - -> With Internet Explorer 6 for Windows XP SP2 and later, the MOTW comment can be used with multipart HTML (. For more information on MOTW, see Mark of the Web. HTML application (. Local Machine zone lockdown. The Local Machine zone lockdown is managed through a feature control registry key (FEATURE_LOCALMACHINE_LOCKDOWN). It is enabled by default for Internet Explorer (iexplore. Windows Explorer (explorer. The following shows the registry key and enabled processes. HKEY_LOCAL_MACHINE (or HKEY_CURRENT_USER)SOFTWAREMicrosoft. Internet Explorer. Main. Feature. Control. FEATURE_LOCALMACHINE_LOCKDOWNiexplore. Applications that host the Web. Browser Control can enable the Local Machine zone lockdown feature by adding their process to the registry. This can be done programmatically by using the Co. Internet. Set. Feature. Enabled function. If an application does not run under this feature control, the Web. Browser Control behaves the same as in Internet Explorer 6 SP1b. Object Caching. In previous versions of Windows, some Web pages could access objects cached from another Web site. In Internet Explorer 6 for Windows XP SP2, a reference to an object is no longer accessible when the user browses to a new domain. For Windows XP SP2, there is a new security context on all scriptable objects so that access to all cached objects is blocked. In addition to blocking access when browsing across domains, access is also blocked when browsing within the same domain (fully qualified domain name). A reference to an object is no longer accessible after the context has changed due to navigation. Prior to Internet Explorer 5. HTML pages (or across frames) purged instances of MSHTML, which is the MicrosoftпїЅHTML parsing and rendering engine. With the Internet Explorer 5. MSHTML remains across navigations. This introduced a new class of vulnerabilities, because objects could be cached across navigations. If an object can be cached and provide access to the contents of a Web page from another domain, there is a cross- domain security hole. If your application receives Access Denied errors, you must recache the object before you access it using a script. In the following example, the security context is invalidated when the design. Mode property is set on a document object. Broken script example. Frame. document. d. Mode = "On". d. open(); // causes permission denied error. Fixed script example. Frame. document. d. Mode = "On". d = my. Frame. document; // reestablishes pointer to document object. Object caching is managed through a feature control registry key (FEATURE_OBJECT_CACHING). It is enabled by default for Internet Explorer (iexplore. Windows Explorer (explorer. The following shows the registry key and enabled processes. HKEY_LOCAL_MACHINE (or HKEY_CURRENT_USER)SOFTWAREMicrosoft. Internet Explorer. Main. Feature. Control. FEATURE_OBJECT_CACHINGiexplore. Applications that host the Web. Browser Control can enable the object caching feature by adding their processes to the registry. This can be done programmatically by using the Co. Internet. Set. Feature. Enabled function. If an application does not run under this feature control, the Web. Browser Control behaves the same as in Internet Explorer 6 SP1b. MIME Handling. Internet Explorer uses MIME type information to decide how to handle files that have been sent by a Web server. For example, when Internet Explorer receives a . Internet Explorer window. If Internet Explorer receives an executable file, it generally prompts the user for a decision on how to handle the file. In Windows XP SP2, Internet Explorer follows stricter rules that are designed to protect users from accidentally downloading or executing a dangerous file because of misleading MIME or file extension information. Internet Explorer uses the following pieces of information to decide how to handle a file. File extension, the corresponding Prog. ID, and the class identifier (CLSID) for the registered handler of that file extension. Content- Type from the HTTP header (MIME type), the corresponding Prog. ID, and the CLSID for the registered handler of that content or MIME type. Content- Disposition from the HTTP header. Results of the MIME sniff. See MIME Sniffing.) Internet Explorer enforces consistency between how a file is handled in the browser and how it is handled in the Windows Shell. As the file is downloaded into the cache, Internet Explorer compares the MIME type of the cache file to the extension of the cache file. If there is a mismatch between them, Internet Explorer reconciles the mismatch by renaming the file in the cache. Before a file is loaded in its MIME handler or executed by its extension handler, Internet Explorer compares the CLSID of the MIME handler to the CLSID of the extension handler. If there is still a mismatch between the two handlers, Internet Explorer displays a prompt that forces the user to confirm whether to load the file in the MIME handler. If the MIME handler rejects the mismatched file, Internet Explorer displays a download error dialog box and does not automatically execute the file in its extension handler. A related change prevents the execution of a potentially corrupt file in its extension handler. Internet Explorer displays the download error dialog box for any file that is rejected by its MIME handler with the error code INET_E_CANNOT_LOAD_DATA and does not execute the file in its extension handler regardless of MIME type or extension. These changes do not affect cases where a Content- Disposition: attachmentпїЅHTTP header is used for the file. For these files, the file name or extension suggested by the server is considered final, and the file can be executed, regardless of any MIME/extension mismatch if the user chooses to accept the file download prompt. Custom MIME handlers that intentionally rely on Internet Explorer to execute files that the custom MIME handler rejects should be updated to accommodate the changes for Windows XP SP2. The most secure scenario would be to handle files natively in the MIME handler instead of rejecting them. If the MIME handler cannot be changed, there are a few options. Develop a MIME handler and an extension handler that are both part of the same CLSID. Internet Explorer can accept the CLSID match and not prompt to download the file or block the file from execution in the extension handler. Mark the MIME handler to be ignored by Internet Explorer when there is a MIME/extension mismatch. For example, if the MIME handler for a certain media MIME type has a mismatched extension and must be executed directly to play properly, you can mark the Prog. ID of the MIME handler to be ignored on the mismatch when the media file extension belongs to a different Prog. ID. To do this, you set the following value in the registry with the MIME handler to ignore. HKEY_CLASSES_ROOTPROG_ID_OF_MIMEHANLDER_TO_IGNOREPrefer. Execute. On. Mismatch = 0x. If neither option is viable, the developer should notify users of the incompatibility, and explain how to save the mismatched file to the file system and how to launch it manually. If your scenario is impacted by unwanted file download prompts because of an irreconcilable MIME mismatch, you can register the MIME handler's Prog. ID to bypass all download prompts, including the new prompt on mismatch. Before doing this, you should confirm that the MIME handler can securely manage any file that is delegated to it. For example, you should confirm that the handler will never allow an attacker to gain more privilege than allowed by the zone of the originating file.
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