Microsoft Windows SChannel Denial of Service Vulnerability (2207566)

# Copyright (C) 2010 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.901164");
  script_version("2021-09-01T09:31:49+0000");
  script_tag(name:"last_modification", value:"2021-09-01 09:31:49 +0000 (Wed, 01 Sep 2021)");
  script_tag(name:"creation_date", value:"2010-10-13 17:10:12 +0200 (Wed, 13 Oct 2010)");
  script_cve_id("CVE-2010-3229");
  script_tag(name:"cvss_base", value:"7.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:C");
  script_name("Microsoft Windows SChannel Denial of Service Vulnerability (2207566)");
  script_xref(name:"URL", value:"http://support.microsoft.com/kb/2207566");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2010/2632");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-085");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 Greenbone Networks GmbH");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_reg_enum.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/registry_enumerated");

  script_tag(name:"impact", value:"Successful exploits will allow attacker to execute arbitrary code in the
  context of the user running the application or cause a denial of service
  condition.");
  script_tag(name:"affected", value:"- Microsoft Windows Vista Service Pack 2 and prior

  - Microsoft Windows Server 2008 Service Pack 2 and prior

  - Microsoft Windows 7");
  script_tag(name:"insight", value:"The flaw is caused by an error in SChannel when processing client certificates
  in implementations of Internet Information Services, which could allow remote
  attackers to cause the LSASS service to stop responding and the system to
  restart by sending malformed packets to a server with SSL enabled.");
  script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");
  script_tag(name:"summary", value:"This host is missing a critical security update according to
  Microsoft Bulletin MS10-085.");
  script_tag(name:"qod_type", value:"registry");
  script_tag(name:"solution_type", value:"VendorFix");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-085");
  exit(0);
}

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

if(hotfix_check_sp(winVista:3, win2008:3, win7:1) <= 0){
  exit(0);
}

## MS10-085 Hotfix (2207566)
if(hotfix_missing(name:"2207566") == 0){
  exit(0);
}

sysPath = smb_get_systemroot();
if(!sysPath ){
  exit(0);
}

dllPath = sysPath + "\system32\Schannel.dll";
share = ereg_replace(pattern:"([A-Z]):.*", replace:"\1$", string:dllPath);
file = ereg_replace(pattern:"[A-Z]:(.*)", replace:"\1", string:dllPath);

dllVer = GetVer(file:file, share:share);
if(!dllVer){
  exit(0);
}

if(hotfix_check_sp(winVista:2, win2008:2) > 0)
{
  SP = get_kb_item("SMB/WinVista/ServicePack");

  if(!SP) {
    SP = get_kb_item("SMB/Win2008/ServicePack");
  }

  if("Service Pack 1" >< SP)
  {
    if(version_is_less(version:dllVer, test_version:"6.0.6001.18507")){
      report = report_fixed_ver(installed_version:dllVer, fixed_version:"6.0.6001.18507", install_path:dllPath);
      security_message(port: 0, data: report);
    }
    exit(0);
  }

  if("Service Pack 2" >< SP)
  {
    if(version_is_less(version:dllVer, test_version:"6.0.6002.18290")){
      report = report_fixed_ver(installed_version:dllVer, fixed_version:"6.0.6002.18290", install_path:dllPath);
      security_message(port: 0, data: report);
    }
    exit(0);
  }
  security_message( port: 0, data: "The target host was found to be vulnerable" );
}

else if(hotfix_check_sp(win7:1) > 0)
{
  if(version_is_less(version:dllVer, test_version:"6.1.7600.16661")){
    report = report_fixed_ver(installed_version:dllVer, fixed_version:"6.1.7600.16661", install_path:dllPath);
    security_message(port: 0, data: report);
  }
}