7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
51.4%
This host is missing an important security
update according to Microsoft KB5021085
# Copyright (C) 2022 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("1.3.6.1.4.1.25623.1.0.826736");
script_version("2023-11-21T05:05:52+0000");
script_cve_id("CVE-2022-41089");
script_tag(name:"cvss_base", value:"7.2");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_tag(name:"last_modification", value:"2023-11-21 05:05:52 +0000 (Tue, 21 Nov 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2023-11-17 17:39:00 +0000 (Fri, 17 Nov 2023)");
script_tag(name:"creation_date", value:"2022-12-14 09:40:30 +0530 (Wed, 14 Dec 2022)");
script_name("Microsoft .NET Framework Remote Code Execution Vulnerability (KB5021085)");
script_tag(name:"summary", value:"This host is missing an important security
update according to Microsoft KB5021085");
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 insufficient validation
of user-supplied input in the .NET Framework.");
script_tag(name:"impact", value:"Successful exploitation will allow an attacker
to execute arbitrary code on the target system.");
script_tag(name:"affected", value:"Microsoft .NET Framework 3.5, 4.7.2 and 4.8 on Microsoft Windows 10 version 1809 32-bit/x64-based Systems and Microsoft Windows Server 2019.");
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/5021085");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2022 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(win10:1, win10x64:1) <= 0){
exit(0);
}
sysPath = smb_get_system32root();
if(!sysPath ){
exit(0);
}
edgeVer = fetch_file_version(sysPath:sysPath, file_name:"edgehtml.dll");
if(!edgeVer){
exit(0);
}
if(edgeVer =~ "^11\.0\.17763")
{
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;
dllVer1 = fetch_file_version(sysPath:dotPath, file_name:"System.core.dll");
dllVer2 = fetch_file_version(sysPath:dotPath, file_name:"System.printing.dll");
if(dllVer1 || dllVer2)
{
if(dllVer2 && version_in_range(version:dllVer2, test_version:"3.0.6920.8600", test_version2:"3.0.6920.9053"))
{
VULN1 = TRUE ;
vulnerable_range1 = "3.0.6920.8600 - 3.0.6920.9053";
break;
}
else if(dllVer1 && version_in_range(version:dllVer1, test_version:"4.7", test_version2:"4.7.4009"))
{
VULN2 = TRUE ;
vulnerable_range2 = "4.7 - 4.7.4009" ;
break;
}
else if(version_in_range(version:dllVer1, test_version:"4.8", test_version2:"4.8.4589"))
{
VULN2 = TRUE ;
vulnerable_range2 = "4.8 - 4.8.4589" ;
break;
}
}
}
}
}
}
if((!vulnerable_range1 || !vulnerable_range2) && "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)
{
dllVer1 = fetch_file_version(sysPath:dotPath, file_name:"System.core.dll");
dllVer2 = fetch_file_version(sysPath:dotPath, file_name:"System.printing.dll");
if(dllVer1 || dllVer2)
{
if(dllVer2 && version_in_range(version:dllVer2, test_version:"3.0.6920.8600", test_version2:"3.0.6920.9053"))
{
VULN1 = TRUE ;
vulnerable_range1 = "3.0.6920.8600 - 3.0.6920.9053";
break;
}
else if(dllVer1 && version_in_range(version:dllVer1, test_version:"4.7", test_version2:"4.7.4009"))
{
VULN2 = TRUE ;
vulnerable_range2 = "4.7 - 4.7.4009" ;
break;
}
else if(version_in_range(version:dllVer1, test_version:"4.8", test_version2:"4.8.4589"))
{
VULN2 = TRUE ;
vulnerable_range2 = "4.8 - 4.8.4589" ;
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_range1 || !vulnerable_range2) && "NET Framework Setup" >< key)
{
dotPath = registry_get_sz(key:key, item:"InstallPath");
if(dotPath && "\Microsoft.NET\Framework" >< dotPath)
{
dllVer1 = fetch_file_version(sysPath:dotPath, file_name:"System.core.dll");
dllVer2 = fetch_file_version(sysPath:dotPath, file_name:"System.printing.dll");
if(dllVer1 || dllVer2)
{
if(dllVer2 && version_in_range(version:dllVer2, test_version:"3.0.6920.8600", test_version2:"3.0.6920.9053"))
{
VULN1 = TRUE ;
vulnerable_range1 = "3.0.6920.8600 - 3.0.6920.9053";
break;
}
else if(dllVer1 && version_in_range(version:dllVer1, test_version:"4.7", test_version2:"4.7.4009"))
{
VULN2 = TRUE ;
vulnerable_range2 = "4.7 - 4.7.4009" ;
break;
}
else if(version_in_range(version:dllVer1, test_version:"4.8", test_version2:"4.8.4589"))
{
VULN2 = TRUE ;
vulnerable_range2 = "4.8 - 4.8.4493" ;
break;
}
}
}
}
if(VULN1)
{
report = report_fixed_ver(file_checked:dotPath + "\System.printing.dll",
file_version:dllVer2, vulnerable_range:vulnerable_range1);
security_message(data:report);
exit(0);
}
if(VULN2)
{
report = report_fixed_ver(file_checked:dotPath + "\System.core.dll",
file_version:dllVer1, vulnerable_range:vulnerable_range2);
security_message(data:report);
exit(0);
}
}
}
exit(99);
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
51.4%