Questions tagged [asp.net]

ASP.NET is a Web application framework developed and marketed by Microsoft to allow programmers to build dynamic Web sites, Web applications and Web services.

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Prevent CSRF using ViewState?

According to OWASP you can prevent CSRF in a ASP.NET application if you include the SessionID in the ViewState. From the article: Viewstate can be used as a CSRF defense, as it is difficult for an ...
3
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1answer
717 views

Uploading Executable Files

Using proxy software, I was able to bypass a file upload control file-checking for an asp.net system I am pen testing. I noticed they are saving the file into the database as bytes, and it is ...
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0answers
43 views

SQL Injection via Unicode [duplicate]

My team currently uses ASP.NET with MS SQL Server for our software. Security has only become important since I started, in which there is injection vulnerabilities everywhere. Due to current ...
4
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4answers
13k views

SQL Injection via Unicode

My team currently uses ASP.NET with MS SQL Server for our software. Security has only become important since I started, in which there is injection vulnerabilities everywhere. Due to current ...
1
vote
1answer
490 views

IIS 7.5 WebDav Security Issues with Students

Hello Currently I am setting up a server for college students (this includes tech-savy IT students as well) and I will be using IIS 7.5 with Webdav for the students to access their files from home. ...
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3answers
651 views

Restrict request to Android and Iphone App only?

I have a ASP.NET/IIS server. I want to restrict my server to only accept request from Android and Iphone(IOS) applications. I have heard about HMAC. Can HMAC help me?
2
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1answer
2k views

.NET provides 8+ ways to encode data to prevent XSS attacks. Which one should I use when? [closed]

I'm looking at ways to use .NET to prevent XSS attacks and have come across the following methods to encode data: string asdf = WebUtility.UrlEncode(code); string asdf1 = HttpUtility....
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1answer
2k views

How are .NET websites hacked? [closed]

I have heard many times that hacking .NET websites is different from others. What's the technique used by hackers to hack .NET websites, and how can we secure .NET websites?
8
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2answers
2k views

Are userid and password needed in order to pentest a website?

We are a company that has many web applications developed in ASP.NET. Our Internet service provider (Telefonica) wants to test our web sites looking for vulnerabilities. For that, they are asking us ...
2
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1answer
2k views

Security implications of granting IIS user group folder modify permissions

I have an Application Pool in IIS running under the standard AppPoolIdentity as part of the IIS_IUSRS group. What are the security implications of granting AppPoolIdentity modify and create ...
4
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1answer
1k views

Should we bother with cell-level encryption for an ASP.NET/SQL Server web application?

(Cross-posting this here on the advice of a user at stackoverflow...) Got a philosophical security question for everyone. I'm sketching out an ASP.NET web application design where sensitive data for ...
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2answers
22k views

Missing Secure Attribute in Encrypted Session (SSL) Cookie Recheck

I tested a web application with a commercial tool (IBM AppScan) for penetration test. I found a bug which is related to Missing Secure Attribute in Encrypted Session (SSL) Cookie. The web ...
4
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3answers
490 views

Can a mismatched server encoding on HTTP POST or GET result in a security issue?

It is possible for a server to parse HTTP POST and GET data with a fixed encoding or one that is dynamic with the client's response. Consider the situation where a client uses UTF7,32 or any other ...
2
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1answer
2k views

What method for CSRF token generation should I use in my scenario?

I'm working on a RESTful API to work with my AngularJS application. Authenticating works by generating an ASP.NET FormsAuthenticationTicket. It is stored in a cookie using FormsAuthentication.Encrypt....
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4answers
1k views

Shared hosting vs VPS

I have an Asp.net site. Which hosting system do I need to secure it adequately* against anyone reading private information that's on the server? This is assuming I'm not worried about the sysadmins ...
3
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4answers
3k views

Is replacing all apostrophes with two apostrophes sufficient to prevent SQL-injection on MSSQL?

I'm working in a web site that doesn't use parameters on SQL queries. All the queries are adhoc and the way they are doing the input validation seems good to me, I'm not able to break it to do SQL ...
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3answers
240 views

How to be secure your page from Zeus Trojan?

How can I prevent from an attack like this? http://www.youtube.com/watch?v=bgt98VajOv4 Edit: Sorry guys, I think I can't explain my question well. I don't want to secure myself from that trojan. I ...
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1answer
2k views

Web Applications terminate strings on null-byte

I have just been doing some penetration testing on a site, and I have noticed (and I have noticed before but now seems like a good point to bring it up) that putting a null byte in the search string ...
17
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5answers
5k views

Is it possible to inject values in a drop down list?

Say a ASP.NET page, or any html page for that matter, has a drop down list with a bunch of prices. On posting the page, the code looks at the selection of the drop down list for a computation. Is it ...
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2answers
1k views

IIS 7.5 impersonation threat?

I am using IIS 7.5 and I want to impersonate users for my different applications in an intranet environnement. To do so, I am considering using the asp.net mechanism with the user/password in the web....
2
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2answers
1k views

Web Services and WSDL Documentation Protocol

Let us assume that I have a web service in an ASP.NET project. If I turn off the WSDL documentation protocol, will other users be able to: add a service reference to the web service? discover the ...
4
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3answers
512 views

Understanding JVM zero day in relationship with other runtimes

I am a .net and php developer and since java has been in the news recently thanks to the string of zero days, I decided to brush up on security. In regards to the java zero days, this question has ...
4
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1answer
2k views

Encrypted view state vulnerable?

While reading up on view state as a possible means to prevent CSRF, I came across this Microsoft Security Bulletin which states: An attacker who successfully exploited this vulnerability could read ...
4
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2answers
6k views

How to determine if ViewState has MAC enabled when crawling a page?

I was using Burp Suite to do some security testing on a site and I noticed that when it detects ViewState it will automatically tell you whether it has MAC enabled. I'm curious if anyone know of a ...
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1answer
255 views

Using Old version of mysql connector's security issue [closed]

I'm using asp.net 4.0 and MySQL. Last week my hosting firm changed security level of from full to medium. MySQL connector doesn't work correctly anymore. For this reason I'm using old version of ADO....
6
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1answer
4k views

Pen Testing ASP.NET application with Backtrack

We have developed an ASP.NET Based Enterprise Application which is is soon to be released. Now, we are concerned about the security aspects of the application. I've been looking into Backtrack 5 and ...
1
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1answer
91 views

Password Verification Server

I posted a question here... Protecting Password Hashes with Store Procedures? ...where I asked about denying a website's database user CRUD access to the tables that store password hashes except ...
1
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1answer
5k views

ASP.net vs PHP security? [closed]

I have been told that generally speaking, asp.net web apps tend to be more secure than php, since asp.net has some automatic security measures, for example, by default it doesn't allow remote file ...
7
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2answers
15k views

ASP.NET vulnerability CVE-2008-5100 (assembly signing bypass): is there a fix?

The short version of this question is:  Is there a fix or mitigation for the ASP.NET vulnerability CVE-2008-5100, which allows attackers to bypass assembly digital signature checking? I'll ...
1
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2answers
537 views

What is a better practice - RSA Encryption vs Windows authentication

I have two machines running windows OS with IIS and window OS with MS SQL. In the production web.config file I configure the IIS to use a user name and password when connecting to the DB and then I ...
1
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1answer
796 views

Setting up ASP.NET web application on internet for first time; Are these security measures enough?

I have a web application running on IIS 7 in offices on LAN and I wish to upload it to hosting space on (Godaddy) because I like it to be used in my other offices (other cities). This application ...
2
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1answer
402 views

Accessing encrypted data with multiple users

I'm building a web based, LDAP authenticated password manager for internal use. We don't want to store the passwords in plain-text in the database, and we want multiple users to be able to access the ...
8
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1answer
3k views

ASP.NET HTTP Response Splitting Attack

By default ASP.NET checks for HTTP Response Splitting attack when you do Response.Redirect: Response.Redirect("/MySite/Default.aspx?lang=foobar%0d%0aContentLength:%200%0d%0a%0d%0aHTTP/1.1%20200%20OK%...
6
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1answer
2k views

Secure query string parameters

I have an application which use the Thick box jQuery component to open a popup page . And I pass my parameters in query string like this : <a id="btnShowPopup6" runat="server" class="thickbox" ...
0
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1answer
414 views

My website keeps getting infected [closed]

I recently started getting this really weird problem where a virus seems to pop up as frequently as once a week in my site. It is running on BlogEngine and basically what happens is this: A bunch of ....
0
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1answer
214 views

Comparison between Data Encryption Tools and Data Sanitization Tools [closed]

What are the famous Data Sanitization Tools for languages such as ASP/PHP/Html Web Sites? Which Data Sanitization tools have the best results? Difference between Data encryption and Data ...
8
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1answer
2k views

How secure are the default ASP.NET membership and role providers for Sql Server?

I have a very basic idea of how these work. I've used them many times when I needed a user management system rather then writing my own. But should I use these for a production system? Would ...
2
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3answers
5k views

Potential consequences of using “Everyone” to manage permissions?

If a web application is set to run using a specific account, could a malicious user do something they shouldn't if I use the "Everyone" account to manage permissions on a folder on the server? The ...
4
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1answer
3k views

Is ASP.NET Event Validation completely secure?

I am currently testing a ASP.NET web application for its security. Doing so I came across the event validation mechanism. Is there some way to bypass it? How much assurance is there that it cannot be ...
3
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1answer
902 views

Backdoor.ASP.Ace.C keeps showing up and being removed by f-secure

Backdoor.ASP.Ace.C is being found and removed from: C:\Users[username]\AppData\Local\Temp[randomstring] We have recently found some malicious aspx files on our IIS server that we have studied and ...
4
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1answer
378 views

Payment security on Android App

I am developing an application from which users browse and buy books. The client can be Android ,iOS, Mac. The server is ASP.net Web APIs. I know there are many payment services available. One of ...
2
votes
3answers
2k views

How to do a virus scan before post attachments in asp.net application

How to do a virus scan before post attachments in asp.net application,when they find a virus on to give up post attachments,otherwise proceed to upload. I wonder if there are any APIs out there where ...
4
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1answer
2k views

Encrypt Medicare card numer in C# in ASP.NET

I am giving a free consultation for a non profit organisation that wants a simple system to manage multiple groups with a schedule component, etc. and also manage the medical informations of the kids. ...
2
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2answers
8k views

How does ViewState protect against CSRF?

According to the OWASP CSRF Cheat Sheet viewStateUserKey for ASP.NET ViewState is acceptable to prevent csrf attacks, but I really don't get how. I get that this makes it hard for an attacker to ...
5
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2answers
1k views

Security web scanner tool for IIS/SQL Server

I'm trying to do penetration testing of our ASP.NET web-site to check for security loopholes (specifically for SQL injections). We bought a commercial web scanner tool (IBM Rational AppScan), however ...
1
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2answers
703 views

AntiXSS for ASP.NET 1.1

Unfortunately, a client of mine still has an application based on ASP.NET 1.1. Yes yes, I know - horribly insecure, support ending, and on and on... I've already been through that with them. ...
4
votes
3answers
537 views

Possible holes in this ASP.NET security design?

So I plan on updating some data via an ASMX web service on a web server via .NET programs running elsewhere. The primary security concern is that this web service needs to spawn a process to handle ...
1
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2answers
630 views

Our company needs to conduct an audit of a large ASP.NET solution that was developed for us by a development company. [closed]

What professional standards and practices are recommended for guiding such an effort?
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2answers
1k views

How do I find .asmx files?

I have a web service (ASP.NET) running on my application server. It can be reached via http://xxxxxx/Servercomponents/servercomp.asmx Is possible to find this even if you don't know the file name ...
1
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3answers
293 views

Is a web application being built on an open-source platform less secure because it is open-source?

With the recent news that microsoft are releasing the source code for their ASP.NET Web API and web pages 1 I'm wondering, Does having access to the source code of the underlying libraries a web ...