Security :: In Application How To Stop Cross Site Request Forgery

Jun 15, 2010

I am using asp.net 3.5 and have validateRequest="true" in the machine.config.

Do I need to do something special to stop CSRF and Cross Site scripting or asp.net will handle all these?

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On web app1, I have a http handler like

public class MyHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
string url = "http://WebApp2/Test";
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in above way, I can set authentication in code and pass it WebApp2.

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myReq.Credentials = CredentialCache.DefaultCredentials;

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My question is twofold: is there a better method than using a web service and two, is there a problem with my implementation?

asmx:

[WebMethod]
public string World()
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WebRequest request = WebRequest.Create("http://twitter.com/statuses/user_timeline/username.json?count=1");
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StreamReader reader = new StreamReader(response.GetResponseStream());
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aspx

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js" type="text/javascript"></script>
<script>
$(document).ready(function() {
$.ajax({
url: "WebService1.asmx/twitter",
type: "POST",
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var t = eval(obj.d)[0].text;
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Cross Site Scripting Vulnerability?

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We recently discovered that our web app was vulnerable to cross site scripting (XSS) attacks. We managed to manipulate our inputs to produce the following HTML:

[Code]....


Which executes an alert window when clicked.

After HTMLEncoding using the AntiXSS the web app successfully encodes the output to look like this:
<a href="javascript:__doPostBack('ctl00$ContentPlaceHolder1$CtlSearchList1$CtlListView1$DataGrid1$ctl03$ctl00','')">'); onclick=alert('This
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but the alert window still fires! What am I doing wrong?

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Site Security/Access Management For Mvc Application

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I am trying to find a good pattern to use for user access validation.

Basically on a webforms application I had a framework which used user roles to define access, ie, users were assigned into roles, and "pages" were granted access to a page. I had a table in the database with all the pages listed in it. Pages could have child pages that got their access inherited from the parent.

When defining access, I assigned the roles access to the pages. Users in the role then had access to the pages. It is fairly simple to manage as well. The way I implemented this was on a base class that every page inherited. On pageload/init I would check the page url and validate access and act appropriately.

However I am now working on a MVC application and need to implement something similar, however I can't find a good way to make my previous solution work. Purely because I don't have static pages as url paths. Also I am not sure how best to approach this as I now have controllers rather then aspx pages.

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Cross Browser - Site Mobile Phone Support?

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Response.Write("bb.css");
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This will work fine, but i feel like there is a better method, i'm sure i've read about something in the past but i can't seem to recall.I'm also considering a response.redirect to a differant page for a blackberry, which at the moment i would implemenet in a similar way.

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WIF Cross-domain On One IIS Site/ Dynamically Setting Of Realm?

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We have a lot of domains running on one IIS WebSite/AppPool.

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<wsFederation passiveRedirectEnabled="true" issuer="http://issuer.com" realm="http://realm.com" requireHttps="false" />

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User A loads the page and the realm get set to domain.a.com.

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This all works great, except when I try to use this search capability from the search.aspx page, itself. I figure this is because I am using the Page.PreviousPage object and since a postback from the search.aspx page, itself will result in the Page.PreviousPage being Nothing, it is not performing the proper action.

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Due To The Presence Of Characters Known To Be Used In Cross Site Scripting Attacks?

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where does following HTTP error message come from:

Due to the presence of characters known to be used in Cross Site Scripting attacks, access is forbidden. This web site does not allow Urls which might include embedded HTML tags.

We're using dynamically generated URLs and in this specific case the URL contains the characters '<' or '>'. We do URL encode the generated URL (so '%3C' appeary instead of '<') but it doesn't Our setup is ASP.NET MVC / IIS 7.5 / IE8. It's strange but it looks like the error appears only on some machines. So it could be that the IE internet zone settings are playing a role.

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Web Forms :: HttpRequestValidationException - Handling Cross Site Scripting (XSS)?

Oct 25, 2010

this exception is caused by entering scripts or disallowed text as "<script>", "<h1>" by the user. This exception will be thrown while processing the request.

After searching and trying, most of the solutions were to:

1- disable request validation in the page header (validateRequest="false") or in the pages section in web.config.

I dont see this is a solution, the XSS problem is still there, it just does not throw the exception.

2- To encode the text and decode it using Server.HtmlEncode and Server.HtmlDecode.

This is a good one, but have to go every single textbox and call this method (Server.Encode(txtAddress.Text)), but this require alot of effort to change the whole site, and some of them may be forgotten.

I was thinking of creating a new TextBox control (MyTextBox) to inherit from System.Web.UI.WebControls.TextBox and override the Text property, then Encode base.Text in the get accessor, and Decode base.Text in the set accessor.

This will also require to change the whole site, to use MyTextBox instead of TextBox.

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Web Forms :: How To Prevent Cross Site Scripting In Bll Layer

Jan 21, 2010

To have a better secure application, we have to prevent cross site scripting.

I have application that use a bll.

All inputs have to pass bll before they were pass to database.

To prevent cross site scripting, is bll the correct place to validate the input?

To be exact, are all the properties of object should be validated?

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Code Analysis Tool To Check Cross Site Scripting?

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I am aware of a tool which MS has provided which tells you about coss site scripting attack etc.
The tool is [

But are there tools which you have used for ASP .NET applications which do similar to this and which one is widely used in ASP .Net applications ?

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How can I test an application that I am publishing to a remote provider's IIS7 hosted site, with the VS2008 development server that is built in with VS2008 on an XP Machine?

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I am running XP, and local IIS version installed is 5.1.

My guess is what is happening is that the new format required in the web.config is configured properly for IIS7 deployment, which is why it works remotely, but when running locally through VS2008/XP it is running with an older version on IIS and does not recoginize the new tags.

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I want to be able to (in code) tell the page to refresh at that point ignoring anything else it was going to do.

Explanation:

I have a property lets call it AllUsers

AllUsers
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e.g. something like this

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but how can I abort all code? because if I use this where I have placed my method the code will run and then reload on the next page load.

Should I change by property design? I wanted to have a property which would always be valid and up to date so any code using it wouldn't have to worrie

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give some insights on using RESTful webservices to implement this, or else, using some HttpModule to intercept requests at App1 and modify redirect response to app2 or any other approach that you might find fit for the purpose.

Edit: Using querystring isnt an option for me.

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How can I get a user's geolocation information (City and Country - internet service provider and internet speed would also be great) based on their IP address?

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I wont to restrict my web service only for few domains.

I wont to have access to web service from using ajax and my page, and I don't want that anybody can create client to my WebService and view my web service methods.

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Security :: Cannot Redirect To The Home Page When Logout From Cross Domain

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I am browsing the page (http://jessie.mydomain.com/), then i click the Logout button in this page, it will be logout successful but it will not redirect to the page (http://www.mydomain.com/Default.aspx), it will show (http://jessie.mydomain.com/Default.aspx).

(1) In master page,

[Code]....

[Code]....

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