PHP (Hypertext Preprocessor) Info.

Download Php Site Server Users May Be Authenticated Under the Wrong

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Developer Php Account

However, the following Users may not use or access the Server Software when such Server Software is licensed pursuant to SAL(s): Users that would access the Server Software solely through the Internet and would not be authenticated or otherwise individually distinguished by the Server Software or a Multiplexing Service (for example, by browsing a public website anonymously).

Database Php This article was previously published under Q263730

In addition, you may not use your account to breach security of another account or attempt to gain unauthorized access to another network or server. Not all areas of the site may be available to you or other authorized users of the site. You shall not interfere with anyone else’s use and enjoyment of the site or other similar services. Users who violate systems or network security may incur criminal or civil liability.

Php Xml SYMPTOMSOn a Web site that authenticates with Site Server 3.0 HTML

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File Php Forms Authentication, users may inadvertently be authenticated under another

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Php Upgrading Account. This can occur even when the user has not attempted to log on.

Php Forum CAUSEThis problem can occur because the HTML Forms Authentication

Flash Php Method uses a cookie that is presented by the client browser. Site Server sets

Ajax Php This cookie when a valid user authenticates, and by default, reissues this

Dream Foundation Php Weaver Cookie every 60 seconds.

Php Proxy Certain intermediary proxies and caches on the

Nuke Php Theme Internet may cache Web server responses that contain Set-Cookie headers, which

Php Security Are then returned to a different user. Because Site Server HTML Forms

Editor Php Authentication uses a cookie to authenticate users, this can cause a user to

Hosting Mysql Php Web Accidentally (or intentionally) impersonate another user by receiving a cookie

4th Development Edition Mysql From an intermediary proxy or cache that was not originally intended for them.

Php Web WORKAROUNDTo work around this issue, use one of the following methods:

Development Mysql Php Web Method 1If the site does contain data of a sensitive nature, then run

Index Php The site over SSL. This ensures that the cookies cannot be seen by other users

Download Php (either accidentally or deliberately). This also stops intermediary proxies and

Developer Php Caches from caching the response, because only the requesting client can decode

Database Php The encrypted response from the Web server. This is the most secure method.

Php Xml Method 2Set HTML Forms Authentication so that is does not reissue the

File Php FormsAuth cookie. To do this, use the following command line on the server: PMAdmin Set Master /FormsAuthTimeout:Off

Php Upgrading
NOTE: If you use this command line, and it does

Php Forum Not appear to change the setting, locate the HKLM\SOFTWARE\Microsoft\Site

Flash Php Server\3.0\P&M\APP registry key and make sure that the FormsAuth Use

Ajax Php Inactivity Timeout value is set to 0.

Dream Foundation Php Weaver This is the least secure

Php Proxy Method, because there is an increased chance that a malicious user may intercept

Nuke Php Theme The FormsAuth cookie and use it to deliberately impersonate another user for the

Php Security Duration of the session. If this is a concern, use the SSL method.

Editor Php If you

Hosting Mysql Php Web Use this method, the only time a FormsAuth cookie is issued is when the user's

4th Development Edition Mysql Credentials are first verified. The Set-Cookie header is part of a "302 - Found"

Php Web Response, which should not be cached. (For additional information, see the "More

Development Mysql Php Web Information" section of this article.) However, for extra security, you can add

Index Php Headers to the page that issues this first cookie to ensure that the response is

Download Php Not cached. To do this, perform the following steps:

Developer Php Open the Microsoft Management Console (MMC) for Internet Information Server.

Database Php Locate the page that verifies the users credentials. By default, this is the

Php Xml Verifpwd.asp page, which is located in the _mem_bin virtual directory.

File Php Right-click the page, and then click Properties.

Php Upgrading Click the HTTP Headers tab, and in the Customer

Php Forum HTTP Headers section, click the Add button. In the

Flash Php Custom Header Name field, enter Expires, and for the

Ajax Php Custom Header Value, enter Wed, 01 May 1996 12:00:00

Dream Foundation Php Weaver GMT.

Php Proxy Repeat step 3, and enter Cache-Control in the Customer

Nuke Php Theme Header Name field, and enter private for the

Php Security Customer Header Value.NOTE: Because

Editor Php The FormsAuth cookie is not automatically reissued, the user session times out

Hosting Mysql Php Web Regardless of whether the user is active or not, which requires the user to

4th Development Edition Mysql Re-authenticate in the login page. This can be minimized by increasing the

Php Web Session length. This information is documented in the Site Server online

Development Mysql Php Web Documentation at the following location:

Index Php Personalization and Membership P&M Operations

Download Php Guide/Configuring Membership Server Elements/Configuration the Authentication

Developer Php Service/Limiting Session Length

Database Php Method 3For every page that may set this cookie, make sure that the

Php Xml Headers stop intermediary proxies and caches from caching the responses. To do

File Php This, perform the following steps:

Php Upgrading Open the Internet Information Services Management Console and navigate to

Php Forum The starting node where HTML Forms Authentication is in place. (This is the site

Flash Php Level if the entire site is restricted, or a subfolder if only certain areas are

Ajax Php Restricted.)

Dream Foundation Php Weaver Right-click this node, and than click Properties.

Php Proxy Click the HTTP Headers tab. In the Customer HTTP

Nuke Php Theme Headers section, click the Add button. In the

Php Security Custom Header Name field, enter Expires, and for the

Editor Php Custom Header Value, enter Wed, 01 May 1996 12:00:00

Hosting Mysql Php Web GMT.

4th Development Edition Mysql Repeat step 3, and enter Cache-Control in the Customer

Php Web Header Name field, and enter private for the

Development Mysql Php Web Customer Header Value.NOTE: If you

Index Php Use this method, all images under this level will not be cached. This can cause

Download Php An extra load on the Web server. If the images do not need to be restricted and

Developer Php Do not require personalization, you can use the following method to allow them

Database Php To be cached:

Php Xml Move all images so that they are in or under a separate Images folder.

File Php In the MMC, right-click the Images folder, and then click

Php Upgrading Properties.

Php Forum On the Membership Authentication tab, click to select the

Flash Php Allow anonymous check box.

Ajax Php In the Security Support Providers section, make sure that

Dream Foundation Php Weaver HTML Forms Authentication option is not selected. You can do

Php Proxy This by selecting Other Password Authentication and clearing

Nuke Php Theme The two options beneath it. This stops the FormsAuth cookie from being reissued

Php Security When accessing this content.

Editor Php On the HTTP Headers tab, delete the two custom headers that

Hosting Mysql Php Web Were added previously. This allows the content to be cached.

4th Development Edition Mysql MORE INFORMATIONThe following excerpts are from RFC 2616, which

Php Web Specifies Hypertext Transfer Protocol - HTTP/1.1:

Development Mysql Php Web 10.3.3 302 Found

Index Php The requested resource

Download Php Resides temporarily under a different URI. Since the redirection might be

Developer Php Altered on occasion, the client SHOULD continue to use the Request-URI for

Database Php Future requests. This response is only cacheable if indicated by a Cache-Control

Php Xml Or Expires header field.

File Php 13.4 Response Cacheability

Php Upgrading ... If there is neither a cache validator nor an explicit

Php Forum Expiration time associated with a response, we do not expect it to be cached,

Flash Php But certain caches MAY violate this expectation (for example, when little or no

Ajax Php Network connectivity is available)... However, certain intermediary caches

Dream Foundation Php Weaver Or proxies on the Internet may be very aggressive in their caching, and store

Php Proxy And return these pages without the appropriate headers stating they may do so.

Nuke Php Theme This information also implies that the page may be returned from the cache

Php Security During periods of little or no network connectivity, which is undesirable with

Editor Php Cookies intended for user identification. For this reason, it is more secure to

Hosting Mysql Php Web Add headers to explicitly deny the caching of these pages. These recommendations

4th Development Edition Mysql Are true for any page that sets cookies that are not intended for general

Php Web Re-use.
ASP pages may also set headers in scripts by including the following

Development Mysql Php Web Code at the start of the page: <% Response.AddHeader "Expires", "Wed, 01 May 1996 12:00:00 GMT" %>

Index Php <% Response.AddHeader "Cache-Control", "private" %>

Download Php
Microsoft Proxy Server does not cache any pages that contain a

Developer Php Set-Cookie header.

Database Php Steps to Reproduce this Problem

Php Xml Client A requests a page that requires authentication.

File Php Client A is redirected to the logon page.

Php Upgrading Client A enters their account details and logs on.

Php Forum The server responds by setting the FormsAuth cookie and redirecting Client A

Flash Php To the original page.

Ajax Php As the valid, now authenticated Client A browses the Web site the FormsAuth

Dream Foundation Php Weaver Cookie is reissued every 60 seconds with the content being returned at the time.

Php Proxy An intermediary proxy or cache captures and stores this content as it is

Nuke Php Theme Returned, including the Set-Cookie header.

Php Security Client B, which goes through the same intermediary proxy or cache, requests

Editor Php The same content that was stored in the previous step.

Hosting Mysql Php Web The intermediary proxy or cache returns the stored content, including the

4th Development Edition Mysql Set-Cookie header, to Client B. The FormsAuth cookie intended for Client A is

Php Web Now set on Client B.

Development Mysql Php Web When Client B makes requests to the Web server, it presents the FormsAuth

Index Php Cookie that was erroneously returned to it by the intermediary proxy or

Download Php Cache.

Developer Php REFERENCESFor additional information, click the article number below to

Database Php View the article in the Microsoft Knowledge Base:

Php Xml How to Create and Install an SSL Certificate in IIS 4.0
Additional References:

File Php RFC1945 - HTTP/1.0
RFC2109 - HTTP State Management

Php Upgrading Mechanism
RFC2616 - HTTP/1.1

Php Forum The information in this article applies to:

Flash Php Microsoft Site Server 3.0

Ajax Php Last Reviewed:

Dream Foundation Php Weaver 11/4/2002 (1.0)

Php Proxy Keywords:

Nuke Php Theme Kbprb KB263730

Php Security KbAudDeveloper

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