Cannot use a leading ../ to exit above the top directory

43

I have a asp.net web site with it we have admin area with login page for admin only and all site is allowed for all - i need to ask how to define the right security configuration for it as i get this error

Cannot use a leading .. to exit above the top directory. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Web.HttpException: Cannot use a leading .. to exit above the top directory.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 


[HttpException (0x80004005): Cannot use a leading .. to exit above the top directory.]
   System.Web.Util.UrlPath.ReduceVirtualPath(String path) +8862087
   System.Web.Util.UrlPath.Reduce(String path) +52
   System.Web.Util.UrlPath.Combine(String appPath, String basepath, String relative) +214
   System.Web.UI.Control.ResolveClientUrl(String relativeUrl) +180
   System.Web.UI.WebControls.Image.AddAttributesToRender(HtmlTextWriter writer) +68
   System.Web.UI.WebControls.WebControl.RenderBeginTag(HtmlTextWriter writer) +20
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +20
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +163
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +51
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +40
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Control.Render(HtmlTextWriter writer) +10
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266

my configuration file :

 <authentication mode="Forms">
  <forms name=".ASPXFORMSAUTH" protection="All" loginUrl="Admin/LoginPage.aspx" path="/" enableCrossAppRedirects="true">
  </forms>
</authentication>
<authorization>
  <deny users="*" />
</authorization>

asp.net
.net
security
url
configuration
asked on Stack Overflow Feb 14, 2010 by (unknown user) • edited Jul 18, 2015 by Majid

10 Answers

59

What this means is that your web page is referring to content which is in the folder one level up from your page, but your page is already in the website's root folder, so the relative path is invalid. Judging by your exception message it looks like an image control is causing the problem.

You must have something like:

<asp:Image ImageUrl="..\foo.jpg" />

But since the page itself is in the root folder of the website, it cannot refer to content one level up, which is what the leading ..\ is doing.

answered on Stack Overflow Feb 14, 2010 by Adam Ralph • edited Jan 19, 2014 by Majid
16

You can use ~/img/myImage.png instead of ../img/myImage.png to avoid this error in ASP.NET pages.

answered on Stack Overflow Aug 20, 2013 by Majid • edited Feb 28, 2017 by Majid
9

You have an image or a favicon link of the style ="../" somewhere, that if the "../" were valid, would go beyond the top of the site, like this:

Image:

http://example.com/Images/test.jpg

Page

http://example.com/Pages/test.aspx

Valid on that page: ../Images/test.jpg
Would throw an error: ../../Images/test.jpg

answered on Stack Overflow Feb 14, 2010 by Nick Craver • edited Oct 5, 2017 by Matthew Lock
2

It means that one of the paths has a ".." at the beginning of it that would result in exiting the web site's root folder hierarchy. You need to google "asp.net relative paths" or something like that to help you with your problem.

BTW, a hint to where the problem is is included in the exception page that you saw. It will actually tell you what file it found the problem in.

To head off future occurences of this exception, do a search in the entire solution for this string: "../". If you find any of those in files in the root path of your web site, address them.

answered on Stack Overflow Mar 12, 2014 by user3409893
2

In my case it turned out to be commented out HTML in a master page!

Who knew that commented out HTML such as this were actually interpreted by ASP.NET!

<!--
<link rel="icon" href="../../favicon.ico">
-->
answered on Stack Overflow Oct 5, 2017 by Matthew Lock
0

I moved my project from "standard" hosting to Azure and get the same error when I try to open page with url-rewrite. I.e. rule is :

<add key="/iPod-eBook-Creator.html" value="/Product/ProductDetail?PRODUCT_UID=IPOD_EBOOK_CREATOR" />

try to open my_site/iPod-eBook-Creator.html and get this error (page my_site/Product/ProductDetail?PRODUCT_UID=IPOD_EBOOK_CREATOR can be opened without any problem).

I checked the fully site - never used .. to "level up"

answered on Stack Overflow Nov 10, 2014 by Oleg Sh
0

I had such a problem and the answer, although frustrating to find, was solved by doing a search on the offending page for the ".." in the error message. I am using Visual Studio Express and the solution was changing "../../Images/" to "~/Images/" . Hopefully this will help someone.

answered on Stack Overflow Aug 26, 2015 by user1830924
0

I had the problem occur on my system in a very strange way. In my system customers create products that sit inside a directory structure of product categories. So ProductA might sit in the folder CategoryInner inside the folder CategoryOuter. I had just added a feature where my URL would show the category nesting on the URL thusly:

http://www.somedomain.com/product/CategoryOuter/CategoryInner/ProductA.aspx

Obviously the nesting on the URL was just for SEO purposes (and to show the user what category their product was sitting in. But when I used ResolveClientUrl on some URLs that used to work, it must've been confused by the extra fake pathing. The error message was popping up in the debugger on some line that was never the problem so it took me quite some time to figure out what was going on. I wnet through and removed all of my ResolveClientUrl calls that acted on anything that didn't start with a ~ and made the rest of the paths absolute paths.

answered on Stack Overflow Nov 13, 2016 by Brett
0

I got same problem... and I did it.

My code before :

<link rel="stylesheet" href="../css/style.default.css" type="text/css" />

and the problem solved after i changed my code into this :

<link rel="stylesheet" href="css/style.default.css" type="text/css" />

so i think "href=../" is not allowed, cause i dont have problem when i use "../" in "src=../"

Thanks in advance

answered on Stack Overflow Apr 16, 2019 by kho dir • edited Apr 29, 2019 by marc_s
0

I know these answers are enough, but I'll show the place that's throwing an error.

If you have the structure like the below:

  • ./Src/Master.cs - (Master Form Page)
  • ./Invoice/SubFolder/InvoiceEdit.aspx - (Sub Form Page)

If you enter the sub form page, you'll get an error when you use similar like that you've used in master page: Page.ResolveClientUrl("~/Style/img/logo_small.png").

Now ResolveClientUrl is situated in the master page and trying to serve the root folder. But since you are in the subfolder, the function returns something like ../../Style/img/logo_small.png. This is the wrong way.

Because when you're up two levels, you are not in the right place; you need to go up only one level, so something like ../.

answered on Stack Overflow Oct 29, 2019 by mdora7 • edited Oct 29, 2019 by Das_Geek

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