Asp.net Error Aspxerrorpath
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Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping aspxerrorpath c# each other. Join them; it only takes a minute: Sign up ASP.NET aspxerrorpath in URL up vote 14 down vote favorite 1 I have a site where I use CustomErrors in the web.config to specify a custom error page, and that's working just fine. The custom 404 page is also specified in the IIS configuration (because if iis aspxerrorpath it's not, I don't get my custom 404 page). But I have some logic that kicks in if a user gets a 404 that looks at their requested URL and make a navigation suggestion, if appropriate. This logic relies on the aspxerrorpath value. On my development PC, the aspxerrorpath is correctly appended to the URL, like so: http://localhost:3092/FileNotFound.aspx?aspxerrorpath=/badpage.aspx, but on my test site, there's no aspxerrorpath appended to the URL, so all of my custom logic is bypassed and my suggestions don't work. I'm not sure if this is an IIS config issue or something else. The web server is Windows Server 2008 with IIS 7. Any thoughts? Many Thanks. .net asp.net iis .net-3.5 iis-7 share|improve this question asked Nov 5 '08 at 23:27 theog 66511330 On the server, does it get redirected to FileNotFound.aspx or does the url stay the same when the error occurs? Is there a value for defaultRedirect in the web.config? If you remove the values in that element, does the behavior change? –John
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Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. http://stackoverflow.com/questions/267138/asp-net-aspxerrorpath-in-url Join them; it only takes a minute: Sign up aspxerrorpath=/ in url causes custom error page to not work up vote 1 down vote favorite I'm trying to get a site pci compliant. If you visit (dummy ip): http:someipaddress/ZNYTMHXO.ashx Then the user correctly sees the html from the page I have stated in my web config: However if you http://stackoverflow.com/questions/15959432/aspxerrorpath-in-url-causes-custom-error-page-to-not-work use the same url but with ?aspxerrorpath=/ in the query string: http:someipaddress/ZNYTMHXO.ashx?aspxerrorpath=/ Then the page displays a Server Error in '/' Application. runtime error. This is failing the pci scan. Why is this variable causing an issue? Sorry I should state that ZNYTMHXO.ashx does not exist. 404 redirect works when asperrorpath is not in the querystring. -----UPDATE----- Just to help, this is the html of the page that shows, very limited.
Server Error in '/' Application.
Runtime Error
another blog post that covers some Frequently Asked Questions about it. We are actively working on releasing a security update that fix the issues, and our http://weblogs.asp.net/scottgu/update-on-asp-net-vulnerability teams have been working around the clock to develop and test a http://www.technologytoolbox.com/blog/jjameson/archive/2012/01/22/building-technologytoolbox-com-part-14.aspx fix that is ready for broad distribution across all Windows platforms via Windows Update. I’ll post details about this once it is available. Important Update: You can now download the official security patch update here. Please install it ASAP on your servers – it is the only way asp.net error to protect against the vulnerability. Revised Workaround and Additional URLScan Step In my first blog post I covered a workaround you can apply immediately on your sites and applications to prevent attackers from exploiting it. Today, we are revising it to include an additional defensive measure. This additional step can be done at a server-wide level, and should take less than asp.net error aspxerrorpath 5 minutes to implement. Importantly, this step does not replace the other steps in the original workaround, rather it should be done in addition to the steps already in it. Below are instructions on how to enable it. Install and Enable IIS URLScan with a Custom Rule If you do not already have the IIS URLScan module installed on your IIS web server, please download and install it: x86 Version x64 Version It takes less than a minute to install on your server. Add an Addition URL Scan Rule Once URLScan is installed, please open and modify the UrlScan.ini file in this location: %windir%\system32\inetsrv\urlscan\UrlScan.ini Near the bottom of the UrlScan.ini file you’ll find a [DenyQueryStringSequences] section. Add an additional “aspxerrorpath=” entry immediately below it and then save the file: [DenyQueryStringSequences] aspxerrorpath= The above entry disallows URLs that have an “aspxerrorpath=” querystring attribute from making their way to ASP.NET applications, and will instead cause the web-server to return an HTTP error. Adding this rule prevents attackers from distinguishing between the different types of errors occurring on a server – which helps block
Building TechnologyToolbox.com, part 14) Published January 22, 2012 at 10:15 AM by Jeremy Jameson Comments: 2 Categories: Development My System Software is never perfect. Errors will occur in your code. Don't fret, they occur in my code, too. There are nasty little errors in everyone's code -- idly biding their time until they can spring out and aggravate your users. Some errors might be expected, such as HTTP 404 errors when someone mistypes a URL -- or when hackers maliciously try to find vulnerabilities in your application. Other errors might be completely unexpected (e.g. "What do you mean the database transaction log is full? Isn't someone supposed to be monitoring that?"). Many errors are avoidable, but you will inevitably encounter some situations where the best thing your site can do is cough up a decent "mea maxima culpa" message and try to avoid showing users the infamous Yellow Page of Death. Last year, I blogged my recommendations for error handling in SharePoint applications, but what if you aren't using SharePoint? What if you working in plain ol' ASP.NET-land? In that case, you might already have specified a custom error page in the Web.config file and considered it done -- but are you sure that all the bases are covered? Let's examine a few scenarios... Unhandled Exceptions Unless you are writing sample code to demonstrate something as simple as basic calculator functions, you can't possibly expect your code to gracefully handle the multitude of exceptions that might occur at runtime. Therefore, the fewer try/catch blocks you add to your code, the better. Instead you should only catch an exception when you are absolutely sure you can do something useful. If you have catch blocks in your code that do nothing more than log the exception and then re-throw it up the call stack, then...well, I'll just say it, your code blows. Okay, maybe that's a little harsh, but you wouldn't believe how often I've seen this in the past. Even worse, though, are catch blocks that "swallow" the exceptions. If you think there's even a remote chance you might have these in your solution, then you should stop reading this post immediately and instead go do a search in Visual Studio for the word "catch" and scan through the results one-by-one. I'm certainly not saying that you should never use try/catch blocks in your code. There are times when these are very useful. For example, when developing a Web Part (regardless of whether it be for ASP.NET or SharePoint), should an unexpected exception in the Web Part cause the entire page to "blow chunks" or should an error message prominently appear