Preventing Reply Attacks In C#.net?

Mar 25, 2011

I am using c#.net web application.I will not allow reply attacks in my application.How do i prevent from the same.

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Preventing Cookie Replay Attacks In MVC

Jan 22, 2010

This involves using the Membership provider to add a comment to users server side records when they log in and out, and then confirming that when a cookie is used to authenticate, that the user hasn't logged out. This makes perfect sense to me. Where this starts to fall apart is that we do not currently use a membership provider, and so it seems like I face reimplementing all our authentication code to use a membership provider. We currently check authentication in a controller, and make a call to FormsAuthentication.SetAuthCookie() once we know the user exists. It would be a lot of work to force a membership provider in.

Is all this work really neccesary. Can I roll my own key value store of cookie values to logged in users and just make sure I clear this when a user hits the logout button. If this seems unsafe is there a way of implementing a minimal Membership provider in order to make these checks without handing off all authentication code to it?

I guess my main problem here is that we decided a long time ago that the membership provider model doesnt fit with the model we use for locking and unlocking accounts, and chose not to use it. Now we find that the MS recommendations specifically mention a membership provider, and as this is security I need to be sure that not using it as they recommend isn't going to cause troubles.

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Request Validation - Preventing Script Attacks?

Jan 21, 2010

When a user presses Button1 on the Webpage, I would like to copy slightly modified string from txt1 (Text) into txt2 (Text).
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Now it works and allows to take any data from txt1, slightly modify it and put into txt2.So, my question is: Did a level of security was reduced after I wrote validateRequest="false" ? Any code should be added to keep the good level of security? Or, I'd better use another way to copy txt1 to txt2?

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SMS (send And Reply) With Asp?

Aug 9, 2010

i know how to receive a data.. from sms.. using the service provider gateway.. but my problem is the reply of message from the source..the instruction says

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Is it possible to send it using asp.net alone?

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Replay Attacks For HTTPS Requests?

May 5, 2010

Let's say a security tester uses a proxy, say Fiddler, and records an HTTPS request using the administrator's credentials-- on replay of the entire request (including session and auth cookies) the security tester is able to succesfully (re)record transactions. The claim is that this is a sign of a CSRF vulnerability.

What would a malicious user have to do to intercept the HTTPS request and replay it? It this a task for script kiddies, well funded military hacking teams or time-traveling-alien technology? Is it really so easy to record the SSL sessions of users and replay them before the tickets expire?

No code in the application currently does anything interesting on HTTP GET, so AFAIK, tricking the admin into clicking a link or loading a image with a malicious URL isn't an issue.

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SQL Queries Open To Injection Attacks?

Jan 29, 2010

I would now like to check if my code is still open to SQL Injections after this work. I believe the code is now working as it should, but any blinding errors that you see i'd love to hear about too. My code is now looking like:

-code removed-

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Disable Reply In Email?

Aug 31, 2010

I am using smtp to send email messages through our asp.net aplication.

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DataSource Controls :: Vulnerable To Sql Injection Attacks?

Jan 23, 2011

using a linqDataSource control... in the selecting event I have code like the following for a simple search feature:

[Code]....

In general, would dynamically building the 'Where' property of a linqDataSource be vulnerable to sql injection? Or does the control protect against this internally?

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

Mar 9, 2011

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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Security :: How To Prevent ASMX (web Service) Replay Attacks

Jan 20, 2011

I have a ASP.NET XML web service (asmx) running on .NET 3.5. I am trying to figure out how best to prevent replay attacks. Is there any inherent security by .NET 3.5 that should mitigate this issue, or do I need some kind of SOAP header token value?

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Web Forms :: Reply Address Should Be Different In SMTP Client?

Mar 4, 2010

I am creating a windows service to send automatic mails for the consumers, that are referred by our web site professional users to register in our site.

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Recreate Facebook Like Reply Posting Wall?

Jan 17, 2011

I'm trying to recreate a facebook-like reply posting Wall with multiple users; 'm pretty new to the web environment but I have many years of development expierence so I should understand most of what you throw at me aanyone can put me in the right direction what type of script/lib/classes I should check. or even better some example code.

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VS 2008 - How To Create Reply Options On Comments

Dec 12, 2013

I have tried creating a comment section page using data controls like listview and repeater control to display comments and I was wondering how to add reply options on it. I want to create a comment section page with reply option and the users are able to delete its comment as well by hovering the mouse where the close button will show just like any popular websites we've known.

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AJAX :: How To Configure WCF To Accept & Reply To JQuery Post

Jan 11, 2010

I have a WCF web service and jQuery AJAX implementation that appears to be working perfectly, save for a single line of code: the AJAX calls to the WCF service only have the correct HTTP header & content information if I use GET in my AJAX calls. Once I choose to use POST, the WCF service response with "Method Not Allowed". The calls are coming from domains such as sub1.domain.com, and calling svc.domain.com. How can I configure WCF to allow the cross domain AJAX POSTs?

[Code]....

Here's the relevant section of the web.config:

[Code]....

Here's the AJAX code:

[Code]....

I have indeed tried these changes to my interface:

[Code]....

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Web Forms :: Displaying Remote Computer Reply In Window?

Jan 13, 2010

i have to make a login page where user has to enter username & password to get message from remote server. actually its a API, where user send his username and password and get the reply. i have done the login page coding. but i don know how to catch the reply and disply it in window.

note that there is now database or connection string where we have to compare username & password. its simple url as:-

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as soon as we click it. it replies as "invalid User Name or Password".

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Feb 23, 2011

I would like to ask for any suggestion how to let user to leave a short - limited reply on comment....

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Aug 17, 2010

I am using microsoft visual web developer 2010 to build and publish my website, I am facing a security problem. My website has authentication service for my clients, each one he has his own user name and password. After I introduced a new member, my database collapsed, may be this last member is a hacker. Is their a way to improve security vulnerabilities to prevent future attacks. May be through web.config, could be encrypted.

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Nov 24, 2010

I'm using the "cache tecnique" to prevent multiple logins. Reading in this forum I have read the following code:

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Preventing Fullpostback & Reg Ajax?

Jun 28, 2010

i have used ajax , but i am not very clear of its concepts

i just knw that it prevents full post back

1) frm where can i get a very clear concept for the use and purpose of ajax and how its to be used

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3) on the same button click at the end of the click process(ie after adding to grid)i need the autocomplete extetender text box shld be blank

i used textbox1.text="" but its nt working

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MVC :: Preventing URL Browsing Without ChildActionOnly?

Dec 30, 2010

there any way where i can make a page only accessible through a RedirectToAction? It's a bit dumb of a question given a redirect writes a URL.. I know it might sound a bit silly, but i really don't like the fact i have to be 'forced' to create a partial view to be able to make the page i want to redirect to. What i want to do is quite simply, after deleting a user account, redirecting to a page where it says, account deleted (with a bunch of other stuff), so its quite a simple task. I have no problem making a partial view here and there, but if i want to make many pages unaccessible, i think i would have to make most of the website in partial views haha. Maybe i'm getting it wrong though, i've read a couple of posts about it, including Phil Haack's ->http://haacked.com/archive/2009/11/18/aspnetmvc2-render-action.aspx But i'm still very confused about this subject,

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Preventing New Line In A Multiline Text Box?

Mar 16, 2010

How to prevent the new line character at the beginning of the text entering in a multiline text box? Now, I already trimmed the white space at the beginning of the text. but i can't prevent the new line character that has to be occurred by entering the enter key on the most beginning of the text box.

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Web Forms :: Preventing Caching Of Web Pages?

Jan 28, 2011

I am relatively new to ASP.NET and have searched the Internet to find guidance in preventing caching of web pages (in the latest versions of IE, Firefox, Chrome and Safari). Based on my search, I found a lot of conflicting/confusing info. As best as I can tell, it appears that I need to add the following 3 lines to the <head> section of my .aspx files:

[Code]....

if the aforementioned lines are correct and if all 3 lines are necessary? I have tried using different combinations of the 3 lines, but I get conflicting results (i.e., sometimes the page is cached and sometimes it's not).

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MVC :: Preventing Access To Parts Of Website?

Feb 22, 2011

I am developing a registration process which consists of 4 steps. Each step has its own action method. As such a user could type the url for each step as follows: bogusURL/Step1 //returns the View Step1 bogusURL/Step2 //returns the View Step2 etc... I would like to prevent users from gaining access to a step unless they have completed the previous steps. i.e. If they typed in bogusURL/Step2 without having completed Step 1 they should be redirected to the first step.

What is the best way to implement this?

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Preventing Page Lifecycle For One Control?

Dec 16, 2010

I'm using a file manager-type WebControl that does lots of postbacks. It's placed inside a Page that is relatively complex. I would like to prevent the WebControl from causing the whole Page to go through the lifecycle.

Is there any way to isolate the WebControl from the rest of the Page? The only way I can think of is sticking the WebControl in a separate Page and creating an iframe in the original Page. Unfortunately that also means my WebControl properties/settings are no longer in the original Page. If I want two instances of the WebControl with different settings, then I have to create a Page for each setting and reference the correct one in my iframes. Not quite as "drag & drop" as I would like.

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Preventing AutoPostBack According To Confirmation Dialog

Aug 5, 2010

I want to show a confirmation dialog when a specific value is selected in an asp:DropDownList. If the confirmation dialog returns false (cancel) then I want to prevent the AutoPostBack.

<asp:DropDownList id="theDropDownID" onchange="foo()"></asp:DropDownList>

However, it ignores the returned value from foo() and actually does the postback. The generated code of the onchange event is:

foo();
setTimeout("__doPostBack('theDropDownID','')", 0);

so basically controlling the setTimeout that the .net adds, will do the job.

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