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IT Security and Insecurity Portal |
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Change extension |
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 Posted: Thu Mar 06, 2008 11:24 am |
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| Nial |
| Advanced user |
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| Joined: Feb 29, 2008 |
| Posts: 103 |
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Hello !
I was wondering if there were a way to change the extension of a file without changing his execution like for exemple exemple.php to exemple.php.jpg or naming the php file exemple.php?id=jpg to be able to upload is a a jpg file... |
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Last edited by Nial on Mon Mar 24, 2008 10:37 pm; edited 1 time in total |
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| Posted: Thu Mar 06, 2008 12:56 pm |
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| pexli |
| Valuable expert |
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| Joined: May 24, 2007 |
| Posts: 665 |
| Location: Bulgaria |
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| Posted: Fri Mar 07, 2008 4:36 pm |
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| Nial |
| Advanced user |
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| Joined: Feb 29, 2008 |
| Posts: 103 |
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It doesnt seem to work... I've named my file exemple.php%00 and when i want to reach it (in local) on my local server, it doesnt find it...
And is %00 for jpg file or just to change the name of the file? |
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| Posted: Fri Mar 07, 2008 7:18 pm |
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| pexli |
| Valuable expert |
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| Joined: May 24, 2007 |
| Posts: 665 |
| Location: Bulgaria |
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| Try on target server to upload shell.php%00 then search shell.php |
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| Posted: Sat Mar 08, 2008 4:38 am |
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| Nial |
| Advanced user |
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| Joined: Feb 29, 2008 |
| Posts: 103 |
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| Posted: Mon Mar 24, 2008 10:37 pm |
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| Nial |
| Advanced user |
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| Joined: Feb 29, 2008 |
| Posts: 103 |
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I come back :p
There is something i missed with your method. There is an upload script which test if the extension of the file uploaded is .jpg
If i rename my file shell.php%00 it isnt detected as jpg extension. So is there another way to bypass this security?
It doesnt check if the content file is jpg, just the extension. |
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