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64 lines
1.1 KiB
Lua
64 lines
1.1 KiB
Lua
description = [[
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Checks if a VNC server is vulnerable to the RealVNC authentication bypass
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(CVE-2006-2369).
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]]
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author = "Brandon Enright"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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---
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-- @output
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-- PORT STATE SERVICE VERSION
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-- 5900/tcp open vnc VNC (protocol 3.8)
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-- |_realvnc-auth-bypass: Vulnerable
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categories = {"default", "vuln", "safe"}
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require "shortport"
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portrule = shortport.port_or_service(5900, "vnc")
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action = function(host, port)
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local socket = nmap.new_socket()
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local result
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local status = true
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socket:connect(host.ip, port.number, port.protocol)
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status, result = socket:receive_lines(1)
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if (result == "TIMEOUT") then
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socket:close()
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return
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end
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socket:send("RFB 003.008\n")
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status, result = socket:receive_bytes(2)
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if (result == "TIMEOUT") then
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socket:close()
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return
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end
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if (result ~= "\001\002") then
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socket:close()
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return
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end
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socket:send("\001")
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status, result = socket:receive_bytes(4)
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if (result == "TIMEOUT") then
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socket:close()
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return
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end
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if (result ~= "\000\000\000\000") then
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socket:close()
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return
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end
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socket:close()
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return "Vulnerable"
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end
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