Microsoft Windows TLS Protocol Information Disclosure Vulnerability (2655992)

# SPDX-FileCopyrightText: 2012 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("1.3.6.1.4.1.25623.1.0.902846");
  script_version("2026-04-28T06:28:06+0000");
  script_cve_id("CVE-2012-1870");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2012-07-11 10:10:10 +0530 (Wed, 11 Jul 2012)");
  script_name("Microsoft Windows TLS Protocol Information Disclosure Vulnerability (2655992)");
  script_xref(name:"URL", value:"http://support.microsoft.com/kb/2655992");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/54304");
  script_xref(name:"URL", value:"http://www.securitytracker.com/id/1027233");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-049");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2012 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/WindowsVersion");

  script_tag(name:"impact", value:"Successful exploitation could allow an attacker to gain access to sensitive
  information that may aid in further attacks.");
  script_tag(name:"affected", value:"- Microsoft Windows XP x32 Edition Service Pack 3 and prior

  - Microsoft Windows XP x64 Edition Service Pack 2 and prior

  - Microsoft Windows 7 x32/x64 Edition Service Pack 1 and prior

  - Microsoft Windows 2003 x32/x64 Edition Service Pack 2 and prior

  - Microsoft Windows Vista x32/x64 Edition Service Pack 2 and prior

  - Microsoft Windows Server 2008 R2 x64 Edition Service Pack 1 and prior

  - Microsoft Windows Server 2008 x32/x64 Edition Service Pack 2 and prior");
  script_tag(name:"insight", value:"Microsoft Windows contains a flaw related to the Transport Layer Security
  (TLS) Handshake Protocol when the Cipher-block chaining (CBC) mode of
  operation is used. This flaw may allow a remote attacker to gain access to
  decrypted traffic.");
  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 an important security update according to
  Microsoft Bulletin MS12-049.");
  script_tag(name:"qod_type", value:"executable_version");
  script_tag(name:"solution_type", value:"VendorFix");
  exit(0);
}


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

if(hotfix_check_sp(xp:4, xpx64:3, win2003:3, win2003x64:3, winVista:3, win7:2,
                   win7x64:2, win2008:3, win2008r2:2) <= 0){
  exit(0);
}

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

dllVer = fetch_file_version(sysPath:sysPath, file_name:"system32\Schannel.dll");
if(! dllVer){
  exit(0);
}

if(hotfix_check_sp(xp:4) > 0)
{
  if(version_is_less(version:dllVer, test_version:"5.1.2600.6239")){
    security_message( port: 0, data: "The target host was found to be vulnerable" );
  }
  exit(0);
}

else if(hotfix_check_sp(win2003:3, xpx64:3, win2003x64:3) > 0)
{
  if(version_is_less(version:dllVer, test_version:"5.2.3790.5014")){
    security_message( port: 0, data: "The target host was found to be vulnerable" );
  }
  exit(0);
}

## Currently not supporting for Vista and Windows Server 2008 64 bit
else if(hotfix_check_sp(winVista:3, win2008:3) > 0)
{
  if(version_is_less(version:dllVer, test_version:"6.0.6002.18643") ||
     version_in_range(version:dllVer, test_version:"6.0.6002.22000", test_version2:"6.0.6002.22868")){
    security_message( port: 0, data: "The target host was found to be vulnerable" );
  }
  exit(0);
}

else if(hotfix_check_sp(win7:2, win7x64:2, win2008r2:2) > 0)
{
  if(version_is_less(version:dllVer, test_version:"6.1.7600.17035") ||
     version_in_range(version:dllVer, test_version:"6.1.7600.20000", test_version2:"6.1.7600.21224")||
     version_in_range(version:dllVer, test_version:"6.1.7601.17000", test_version2:"6.1.7601.17855")||
     version_in_range(version:dllVer, test_version:"6.1.7601.21000", test_version2:"6.1.7601.22009")){
    security_message( port: 0, data: "The target host was found to be vulnerable" );
  }
}