This host is missing a critical security
update according to Microsoft KB4566517
# Copyright (C) 2020 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("1.3.6.1.4.1.25623.1.0.817308");
script_version("2020-07-15T19:15:26+0000");
script_cve_id("CVE-2020-1147");
script_tag(name:"cvss_base", value:"10.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
script_tag(name:"last_modification", value:"2020-07-15 19:15:26 +0000 (Wed, 15 Jul 2020)");
script_tag(name:"creation_date", value:"2020-07-15 10:20:15 +0530 (Wed, 15 Jul 2020)");
script_name("Microsoft .NET Framework Remote Code Execution Vulnerability (KB4566517)");
script_tag(name:"summary", value:"This host is missing a critical security
update according to Microsoft KB4566517");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The flaw exists due to an error in .NET
Framework when the software fails to check the source markup of XML file input.");
script_tag(name:"impact", value:"Successful exploitation will allow an attacker
to run arbitrary code in the context of the process responsible for deserialization
of the XML content.");
script_tag(name:"affected", value:"Microsoft .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Microsoft Windows 7 SP1 and Microsoft Windows Server 2008 R2 SP1.");
script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"executable_version");
script_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/4566517");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
script_family("Windows : Microsoft Bulletins");
script_dependencies("smb_reg_service_pack.nasl");
script_require_ports(139, 445);
script_mandatory_keys("SMB/WindowsVersion");
exit(0);
}
include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");
include("secpod_smb_func.inc");
if(hotfix_check_sp(win7:2, win7x64:2, win2008r2:2) <= 0){
exit(0);
}
sysPath = smb_get_system32root();
if(!sysPath ){
exit(0);
}
if(!registry_key_exists(key:"SOFTWARE\Microsoft\.NETFramework")){
if(!registry_key_exists(key:"SOFTWARE\Microsoft\ASP.NET")){
if(!registry_key_exists(key:"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\")){
exit(0);
}
}
}
key_list = make_list("SOFTWARE\Microsoft\.NETFramework\", "SOFTWARE\Microsoft\ASP.NET\", "SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\");
foreach key(key_list)
{
if(".NETFramework" >< key)
{
foreach item (registry_enum_keys(key:key))
{
NetPath = registry_get_sz(key:key + item, item:"InstallRoot");
if(NetPath && "\Microsoft.NET\Framework" >< NetPath)
{
foreach item (registry_enum_keys(key:key))
{
dotPath = NetPath + item;
dllVer = fetch_file_version(sysPath:dotPath, file_name:"System.data.dll");
if(dllVer)
{
if(version_in_range(version:dllVer, test_version:"2.0.50727", test_version2:"2.0.50727.8948"))
{
vulnerable_range = "2.0.50727 - 2.0.50727.8948" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.0", test_version2:"4.0.30319.36644"))
{
vulnerable_range = "4.0 - 4.0.30319.36644" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.6", test_version2:"4.7.3629"))
{
vulnerable_range = "4.6 - 4.7.3629" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.8", test_version2:"4.8.4189"))
{
vulnerable_range = "4.8 - 4.8.4189" ;
break;
}
}
}
}
}
}
if((!vulnerable_range) && "ASP.NET" >< key)
{
foreach item (registry_enum_keys(key:key))
{
dotPath = registry_get_sz(key:key + item, item:"Path");
if(dotPath && "\Microsoft.NET\Framework" >< dotPath)
{
dllVer = fetch_file_version(sysPath:dotPath, file_name:"System.data.dll");
if(dllVer)
{
if(version_in_range(version:dllVer, test_version:"2.0.50727", test_version2:"2.0.50727.8948"))
{
vulnerable_range = "2.0.50727 - 2.0.50727.8948" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.0", test_version2:"4.0.30319.36644"))
{
vulnerable_range = "4.0 - 4.0.30319.36644" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.6", test_version2:"4.7.3629"))
{
vulnerable_range = "4.6 - 4.7.3629" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.8", test_version2:"4.8.4189"))
{
vulnerable_range = "4.8 - 4.8.4189" ;
break;
}
}
}
}
}
## For versions greater than 4.5 (https://docs.microsoft.com/en-us/dotnet/framework/migration-guide/how-to-determine-which-versions-are-installed#net_b)
if((!vulnerable_range) && "NET Framework Setup" >< key)
{
dotPath = registry_get_sz(key:key, item:"InstallPath");
if(dotPath && "\Microsoft.NET\Framework" >< dotPath)
{
dllVer = fetch_file_version(sysPath:dotPath, file_name:"System.data.dll");
if(dllVer)
{
if(version_in_range(version:dllVer, test_version:"2.0.50727", test_version2:"2.0.50727.8948"))
{
vulnerable_range = "2.0.50727 - 2.0.50727.8948" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.0", test_version2:"4.0.30319.36644"))
{
vulnerable_range = "4.0 - 4.0.30319.36644" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.6", test_version2:"4.7.3629"))
{
vulnerable_range = "4.6 - 4.7.3629" ;
break;
}
else if(version_in_range(version:dllVer, test_version:"4.8", test_version2:"4.8.4189"))
{
vulnerable_range = "4.8 - 4.8.4189" ;
break;
}
}
}
}
if(vulnerable_range)
{
report = report_fixed_ver(file_checked:dotPath + "System.data.dll",
file_version:dllVer, vulnerable_range:vulnerable_range);
security_message(data:report);
exit(0);
}
}
exit(99);