Pete FreitagIs your ColdFusion Administrator Actually Public?
By Pete Freitag
Every so often I get an email back from someone who ran HackMyCF.com saying something like this:
Your scanner says our ColdFusion Administrator is publicly accessible, but I don't think that's true. Am I missing something?
If you visit /CFIDE/administrator/ on their server you will get a 404. BUT if you visit /CFIDE/administrator/index.cfm on their server it resolves to the ColdFusion Administrator. Go ahead and take a minute to try this for yourself on your server, you may be surprised with the results.
This can happen when there is no /CFIDE folder in the given site's web root, and there is no virtual mapping for /CFIDE on the virtual host.
ColdFusion has setup itself with a wildcard mapping that allows it to inspect all requests and see if it want's to handle them, even if the given file does not exist. When you have the /CFIDE directory in the web root it will still serve CFM files under the /CFIDE directory.
So how do you prevent this?
There are a few ways to do this, the first way is to tell IIS to "Verify that file exists" before sending requests to JRun, though this option may interfere with other features in ColdFusion such as cfchart, flash remoting, etc.
Another way to block such requests is to setup an explicit block the /CFIDE/ or /CFIDE/administrator uri's in IIS. There are a few ways to do this, for IIS 7 the Request Filtering Plugin is a good choice, earlier versions might consider using UrlScan, or something like ISAPIRewrite.
You should also consider requiring HTTPS / SSL for ColdFusion Administrator.
There are probably a few more ways you can block this, and a few more reasons that cause this that are not outlined here, but the bottom line is to check it out, and make sure you have blocked it.
I haven't seen this issue on any of my Apache Linux installs but it doesn't mean it's not possible to show up there as well, it could just be a side effect of how I setup those servers.
Is your ColdFusion Administrator Actually Public? was first published on April 28, 2010.
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Comments
First, thank you very much for your work on HackMyCF.com.
Second, I just wanted to also note a couple IIS7 settings that I've used (for the CFIDE/administrator directory of each site):
1) Authentication > Anonymous Authentication > Disabled
2) IPv4 Address and Domain Restrictions > Edit Feature Settings > Access for unspecified clients > Deny
Thanks!,
-Aaron
My preferred method of resolving this is to disallow /CFIDE/administrator/ globally or in all Apache virtual hosts. I prefer to go around the Apache Web server and use the built-in Web server when accessing the CF Admin. Doing this means I need to know the IP of the server (usually a 10 dot or 192 dot IP) and the built-in Web server port (typically 8000 range) in order to log-in to the CF Admin.
If I do this I can still access CF resources through the Apache Web server, but not anything in the /CFIDE/administrator/ folder.
http://pastebin.com/raw.php?i=ZmrQLRH4
http://www.morgankelsey.com/post/how-to-lock-down-cfide-in-iis
I'll paste in a bit of the detail here as well:
-----------------------------------------------
- Open IIS, expand each site that has a virtual mapping to CFIDE.
- Right click CFIDE and click Properties.
- Go to the Directory Security Tab.
- Click the Edit button inside the "IP Address and domain name restrictions" section.
- Click the radio for "Denied access except for the following"
- Add your machine's internal IP, and add 127.0.0.1
Click OK, etc.
Now you need to allow access to /CFIDE/scripts/, or your cfforms won't work.
Right click /CFIDE/scripts/ and click Properties.
- Go to the Directory Security Tab.
- Click the Edit button inside the "IP Address and domain name restrictions" section.
- Click the radio for "Granted Acess"
Click OK, etc.
Go to the command prompt and issue the iisreset command.
Make sure you can still get to your CFAdmin while logged onto your box directly. Make sure you can't from the outside world.