Precondition Failed

User8472

• February 26, 2019 17:14

Hi, I've got a perl script I've been using for years for file uploads and it has been working great. Had a customer use it last week. Now I'm getting the following error (script hasn't been changed): Precondition Failed The precondition on the request for the URL /upload/file-upload.cgi evaluated to false. Additionally, a 412 Precondition Failed error was encountered while trying to use an ErrorDocument to handle the request. -------------------- After doing some investigating, it seems that Apache doesn't want to accept a form input type of "file". Any test form that has a "file" input type is getting the above error. It's accepting regular "text" input types in forms with no issue. Any ideas what's happening/where I can look to fix this? Thanks in advance!

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  User8472

  • February 27, 2019 22:01

  Just a quick update. When this error occurs the script isn't executed. I can run the script directly with no errors (in this case it doesn't really do anything since it's not getting inputs from a form). Only when the script is called via the submission of a form with a "file" input type the error happens.

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  cPanelMichael

  • February 28, 2019 16:51

  Hello @User8472, Can you check if your Mod_Security rules are blocking requests to that script? You can review recent ModSecurity hits via WHM >> ModSecurity Tools. Thank you.

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  User8472

  • February 28, 2019 17:37

  Looks like that was it! Not sure how it got in there. I'll ask around, there's a couple people with whm access but they shouldn't be playing around with such things! Thank you.

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