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Normalize whitespace in x11-access.nse.

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david
2009-08-08 20:02:47 +00:00
parent 1df23cd859
commit 7002052746
1 changed files with 30 additions and 36 deletions
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66
scripts/x11-access.nse
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@@ -1,14 +1,14 @@
-- NSE x11-access v1.3
description = [[
description = [[
Checks if you're allowed to connect to the X server
If the X server is listening on TCP port 6000+n (where n is the display
number), it is possible to check if you're able to get connected to the
number), it is possible to check if you're able to get connected to the
remote display by sending a X11 initial connection request.
In reply, the success byte (0x00 or 0x01) will determine if you are in
the "xhost +" list. In this case, script will display the message: "X
In reply, the success byte (0x00 or 0x01) will determine if you are in
the "xhost +" list. In this case, script will display the message: "X
server access is granted".
]]
@@ -21,53 +21,47 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "safe"}
portrule = function( host, port )
return ((port.number >= 6000 and port.number <= 6009)
return ((port.number >= 6000 and port.number <= 6009)
or string.match(port.service, "^X11"))
-- If port.version.product is not equal to nil, version
-- detection "-sV" has already done this X server test.
and port.version.product == nil
-- If port.version.product is not equal to nil, version
-- detection "-sV" has already done this X server test.
and port.version.product == nil
end
action = function(host, port)
local result, socket, try, catch
socket = nmap.new_socket()
catch = function()
socket:close()
end
local result, socket, try, catch
socket = nmap.new_socket()
catch = function()
socket:close()
end
try = nmap.new_try(catch)
try(socket:connect(host.ip, port.number))
try = nmap.new_try(catch)
try(socket:connect(host.ip, port.number))
-- Sending the network dump of a x11 connection request (captured
-- from the XOpenDisplay() function):
--
-- 0x6c 0x00 0x0b 0x00 0x00 0x00 0x00
-- Sending the network dump of a x11 connection request (captured
-- from the XOpenDisplay() function):
--
-- 0x6c 0x00 0x0b 0x00 0x00 0x00 0x00
-- 0x00 0x00 0x00 0x00 0x00 0x00
try(socket:send("\108\000\011\000\000\000\000\000\000\000\000\000"))
try(socket:send("\108\000\011\000\000\000\000\000\000\000\000\000"))
-- According to the XOpenDisplay() sources, server answer is
-- stored in a xConnSetupPrefix structure [1]. The function
-- returns NULL if it does not succeed, and more precisely: When
-- the success field of this structure (stored on 1 byte) is not
-- equal to xTrue [2]. For more information, see the Xlib
-- According to the XOpenDisplay() sources, server answer is
-- stored in a xConnSetupPrefix structure [1]. The function
-- returns NULL if it does not succeed, and more precisely: When
-- the success field of this structure (stored on 1 byte) is not
-- equal to xTrue [2]. For more information, see the Xlib
-- programming Manual [3].
--
-- [1] xConnSetupPrefix structure is defined in X11/Xproto.h.
-- [2] xTrue = 0x01 according to X11/Xproto.h.
--
-- [1] xConnSetupPrefix structure is defined in X11/Xproto.h.
-- [2] xTrue = 0x01 according to X11/Xproto.h.
-- [3] http://www.sbin.org/doc/Xlib
result = try(socket:receive_bytes(1))
result = try(socket:receive_bytes(1))
socket:close()
-- Check if first byte received is 0x01 (xTrue: succeed).
if
string.match(result, "^\001")
then
if string.match(result, "^\001") then
return "X server access is granted"
end
return
end