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[FD] Kaspersky Company Account - FileManager Vulnerability
- To: fulldisclosure@xxxxxxxxxxxx
- Subject: [FD] Kaspersky Company Account - FileManager Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 2 Sep 2016 15:30:45 +0200
Document Title:
===============
Kaspersky Company Account - FileManager Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1924
Release Date:
=============
2016-08-30
Vulnerability Laboratory ID (VL-ID):
====================================
1924
Common Vulnerability Scoring System:
====================================
3.5
Product & Service Introduction:
===============================
Kaspersky Lab is an international software security group operating in almost
200 countries and territories worldwide. The company is
headquartered in Moscow, Russia, with its holding company registered in the
United Kingdom. Kaspersky Lab currently employs over 2,850
qualified specialists. It has 31 representative territory offices in 30
countries and its products and technologies provide service
for over 300 million users and over 250,000 corporate clients worldwide. The
company is specially focused on large enterprises, and
small- and medium-sized businesses.
(Copy of the Homepage: https://en.wikipedia.org/wiki/Kaspersky_Lab )
Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered an application-side
input validation vulnerability in the official Kaspersky company account
FileManager application.
Vulnerability Disclosure Timeline:
==================================
2016-08-30: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Kaspersky Labs
Product: Filemanager (Company Account) - Online Service (Web-Application) 2016
Q3
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
Remote attackers are able to inject malicious java script code in the search
query into the main module of file manager in the
kaspersky company account online web application . The vulnerable module Manage
FTP attachment Tool suffer from persistent cross
site scripting vulnerability that occurs when processing to search or save
queries in the application. The request method to
inject is POST and the attack vector is located on the application-side. Due to
our investigation we discovered that attackers
are able to save and bookmark the malicious java script code by usage of the
current option to save the queries on default.
Vulnerable Module(s):
[+] /arsys/forms/cssapp/SRS:Attachments/attachments/
Vulnerable Request(s):
[+] POST / GET
Proof of Concept (PoC):
=======================
The application-side web vulnerabilities can be exploited by remote attackers
with low privileged application user account and low or medium user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.
Manual steps to reproduce the vulnerability ...
1. User register at kaspersky company account .
2. User goes to vulnerable module to inject own code :
https://companyaccount.kaspersky.com/arsys/forms/cssapp/SRS:Attachments/attachments/?format=html&cacheid=d700a495
3. Click on advanced search then type this payload : $"><img src="c"
onerror="alert(1)"><script>alert(1)</script> "><img src="c"
onerror="alert(1)"><script>alert(1)</script>$
4. Attacker make a search query . and execution of XSS occurs .
5. Attacker then goes to searches and save it to bookmark it.
6. Successfully reproduce of the vulnerability!
PoC: Video
https://youtu.be/Qfmg4KrXTdg
Solution - Fix & Patch:
=======================
The vulnerability has been patched two days after the report has been arrived
by the kaspersky service developer group in coordination with the official apt
team.
Security Risk:
==============
The security risk of the application-side input validation web vulnerabilities
in the kaspersky customer filemanager is estimated as medium. (CVSS 3.5)
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Lawrence Amer
(http://www.vulnerability-lab.com/show.php?user=Lawrence%20Amer)
Disclaimer & Information:
=========================
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