Microsoft Windows SChannel Denial of Service Vulnerability (2207566)

# SPDX-FileCopyrightText: 2010 Greenbone AG
# 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-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.901164");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  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 AG");
  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);
  }
}