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Unlimited Upload Vulnerability and repair in the bington Document Management System

Source: Internet
Author: User
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Brief description: by default, the upload. asp file in the background is restricted only to asp | aspx | php | jsp | asa | shtml | html | htm | js | vbs.

Detailed description:

<! -- # Include file = "../inc/upload. asp" -->

 

<Html>

 

 

 

<Head>

 

<Meta http-equiv = "content-type" content = "text/html; charset = gb2312">

 

<Title> upload a file </title>

 

<Style>

 

* {Margin: 0px; padding: 0px ;}

 

Body {

 

Font-size: 12px;

 

}

 

. Border {

 

Font-size: 12px;

 

Border: #000 solid 1px;

 

}

 

</Style>

 

<Link rel = "stylesheet" rev = "stylesheet" href = "images/css.css" type = "text/css" media = "all"/>

 

 

 

</Head>

 

Www.2cto.com

 

<Body leftmargin = 0 topmargin = 0>

 

 

 

<%

 

Dim go: go = Request. QueryString ("go ")

 

If Request. QueryString ("action") = "upload" Then

 

Set upload = new my_upload

 

Dim filepath

 

Filepath = trim (upload. form ("filepath "))

 

For each formName in upload. File

 

Set file = upload. File (formName)

 

Dim o, txt, FileExt: FileExt = file. FileExt

 

 

 

Txt = Split ("asp | aspx | php | jsp | asa | shtml | html | htm | js | vbs", "| ")

 

For o = 0 To UBound (txt)

 

If InStr (LCase (FileExt), txt (o) <> 0 Then

 

Response. write "<script> alert ('your upload format is incorrect! '); Location. href = 'up. asp'; </script>"

 

Response. end

 

End if

 

Next

We can upload cer, ashx, and other files.

 

Solution: Modify the source code to only allow uploading images or adding vulnerability files

 

 

Author's dog-like man @ wooyun

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