Microsoft Internet Explorer 'findText()' Unicode Parsing DoS Vulnerability

###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_ms_ie_findtext_dos_vuln_aug09.nasl 6527 2017-07-05 05:56:34Z cfischer $
#
# Microsoft Internet Explorer 'findText()' Unicode Parsing DoS Vulnerability
#
# Authors:
# Sharath S <[email protected]>
#
# Copyright:
# Copyright (c) 2009 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

tag_impact = "Successful exploitation could allow remote attackers to cause
the application to crash.

Impact Level: Application";

tag_affected = "Microsoft, Internet Explorer version 7.x/8.x";

tag_insight = "The flaw is due to error in mshtml.dll file and it can causes
while calling the JavaScript findText method with a crafted Unicode string in
the first argument, and only one additional argument, as demonstrated by a
second argument of -1.";

tag_solution = "No solution or patch was made available for at least one year
since disclosure of this vulnerability. Likely none will be provided anymore.
General solution options are to upgrade to a newer release, disable respective
features, remove the product or replace the product by another one.";

tag_summary = "This host has Internet Explorer installed and is prone to Denial
of Service vulnerability.";

if(description)
{
  script_id(800861);
  script_version("$Revision: 6527 $");
  script_tag(name:"last_modification", value:"$Date: 2017-07-05 07:56:34 +0200 (Wed, 05 Jul 2017) $");
  script_tag(name:"creation_date", value:"2009-08-07 07:29:21 +0200 (Fri, 07 Aug 2009)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_cve_id("CVE-2009-2655");
  script_bugtraq_id(35799);
  script_name("Microsoft Internet Explorer 'findText()' Unicode Parsing DoS Vulnerability");
  script_xref(name : "URL" , value : "http://www.milw0rm.com/exploits/9253");

  script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"executable_version");
  script_copyright("Copyright (C) 2009 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_ms_ie_detect.nasl");
  script_mandatory_keys("MS/IE/Version", "SMB/WinXP/ServicePack");
  script_require_ports(139, 445);
  script_tag(name : "impact" , value : tag_impact);
  script_tag(name : "affected" , value : tag_affected);
  script_tag(name : "insight" , value : tag_insight);
  script_tag(name : "solution" , value : tag_solution);
  script_tag(name : "summary" , value : tag_summary);
  script_tag(name:"solution_type", value:"WillNotFix");
  exit(0);
}


include("smb_nt.inc");
include("version_func.inc");
include("secpod_smb_func.inc");

# Check for XP SP3
SP = get_kb_item("SMB/WinXP/ServicePack");
if("Service Pack 3" >< SP)
{
  # Get for Internet Explorer Version
  ieVer = get_kb_item("MS/IE/Version");
  # Check for IE 7/8
  if(ieVer =~ "^[7|8]\..*")
  {
    dllPath = registry_get_sz(item:"Install Path",
                              key:"SOFTWARE\Microsoft\COM3\Setup");
    dllPath += "\mshtml.dll";
    share = ereg_replace(pattern:"([A-Z]):.*", replace:"\1$", string:dllPath);
    file = ereg_replace(pattern:"[A-Z]:(.*)", replace:"\1", string:dllPath);

    # Get for mshtml.dll Version
    mshtmlVer = GetVer(file:file, share:share);
    if(isnull(mshtmlVer))
      exit(0);

    # Check for DLL version 7.0 <= 7.0.6000.16890 or 8.0 <= 8.0.6001.18812
    if(version_in_range(version:mshtmlVer, test_version:"7.0",
                                          test_version2:"7.0.6000.16890")||
       version_in_range(version:mshtmlVer, test_version:"8.0",
                                          test_version2:"8.0.6001.18812")){
      security_message(0);
    }
  }
}