Skip to main content

ATG - how to prevent Cross-Site attacks using _dynSessConf parameter


Cross-site scripting attacks take advantage of a vulnerability that enables a malicious site to use your browser to submit form requests to another site.

In order to protect forms from cross-site attacks in ATG, you can enable form submissions to automatically supply the request parameter _dynSessConf, which identifies the current session through a randomly generated long number. On submission of a form (using dsp:form tag) or activation of a property setting (using dsp:a tag), the request-handling pipeline ( DAFDropletEventServlet ) validates _dynSessConf  against its session confirmation identifier. If it detects a mismatch or missing number, it can block form processing and return an error.

To disable this functionality, we could give the following properties (@ /atg/dynamo/Configuration to disable it globally)
enforceSessionConfirmation = false -->  specifies whether the request-handling pipeline requires session confirmation in order to process the request; the default value is true.
warnOnSessionConfirmationFailure = false --> specifies whether to issue a warning on a confirmation number mismatch; the default value is true.

You can control session confirmation for individual requests by setting the attribute requiresSessionConfirmation to true or false on the applicable dsp:form or dsp:a tag. If this attribute is set to false, the _dynSessConf parameter is not included in the HTTP request and the request-handling pipeline skips validation of this request’s session confirmation number.

Labels

Labels:

Comments

  1. Anonymous15 May 2014 at 00:53

    http://docs.oracle.com/cd/E24152_01/Platform.10-1/ATGBusCommRefGuide/html/s1402sessionexpirationfromlackofusera01.html

    Can we handle 409 conflict using CheckSessionExpiration?
    I tried this. But before reaching request to pipeline,web.xml redirect to url mention there.

    ReplyDelete

Post a Comment

Popular posts from this blog

Eclipse plug-in to create Class and Sequence diagrams

ModelGoon is an Eclipse plug-in avaiable for UML diagram generation from Java code. It can be used to generate Package Dependencies Diagram, Class Diagram, Interaction Diagram and Sequence Diagram. You coud get it from http://marketplace.eclipse.org/content/modelgoon-uml4java Read more about it and see some vedios about how to create the class and sequence diagram @ http://www.modelgoon.org/?tag=eclipse-plugin Find some snapshots below which gives an idea about the diagram generation.
8 comments
Read more

ATG Search architectural flow : Search and Index

I would like to explain the high level ATG Search implementation architecture ( for an online store) through the above diagram. In this diagram 1.x denotes the search functionality and 2.x denotes the indexing functionality. I have given JBoss as the application server. Physical Boxes and Application Servers in the diagram ( as recommended by ATG )  : Estore ( Commerce ) Box --> The box with the estore/site ear (with the site JSPs and Java codes). Search Engine Box --> The box with the search engine application running. Indexing Engine Box --> The box with the indexing engine application running. CA (Content Administration) Box --> The box with the ATG CA ear ( where we could take CA -BCC - Search Administration and configure the search projects) . Search Indexer Box --> The box with the ATG Search Index ear ( to fetch the index data from repository). Note that the engine performing indexing will need access ...
7 comments
Read more

ATG - more about Forms and Form Handlers

An ATG form is defined by the dsp:form tag, which typically encloses DSP tags that specify form elements, such as dsp:input that provide direct access to Nucleus component properties. Find below a sample dsp:form tag.    <dsp:form action="/testPages/showPersonProperties.jsp" method="post" target="_top">      <p>Name: <dsp:input bean="/samples/Person.name" type="text"/>      <p>Age: <dsp:input bean="/samples/Person.age" type="text" value="30"/>      <p><dsp:input type="submit" bean="/samples/Person.submit"/> value="Click to submit"/>    </dsp:form>   When the user submits the form, the /samples/Person.name property is set to the value entered in the input field.Unlike standard HTML, which requires the name attribute for most input tags; the name attribute is optional for DSP form element tags. If an input tag omits the n...
11 comments
Read more

Google Chrome shortcut keys

If you are a Google Chromey guy, please find below the list of shortcut keys for some of the most used features  :-) Find more shortcut keys @  http://www.google.com/support/chrome/bin/static.py?page=guide.cs&guide=25799&topic=28650
4 comments
Read more

Eclipse plugin: InstaSearch – for quick search

InstaSearch is an Eclipse plug-in for performing quick and advanced search of workspace files. This will index the files and when you search for some file contents, it will look with in this index and the search results will be faster, just like the Goolge instant search. It uses Lucene ( http://lucene.apache.org/ ) for indexing and fast searching of files in the workspace. Each search result file then can be previewed using few most matching and relevant lines. A double-click on the match leads to the matching line in the file. Main Features Instantly shows search results Shows a preview using relevant lines Periodically updates the index Matches partial words (e.g. case in CamelCase) Opens and highlights matches in files Searches JAR source attachments Supports filtering by extension/project/working set Download / Installation In Eclipse Helios (3.6) please install using the  Eclipse Marketplace from the Help menu http://marketplace.eclipse.org/s...
Post a Comment
Read more