10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.4 High
AI Score
Confidence
High
0.373 Low
EPSS
Percentile
97.2%
This host is missing a critical security
update according to Microsoft KB4457034.
# SPDX-FileCopyrightText: 2018 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("1.3.6.1.4.1.25623.1.0.814201");
script_version("2023-07-20T05:05:17+0000");
script_cve_id("CVE-2018-8421");
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:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2018-11-05 15:46:00 +0000 (Mon, 05 Nov 2018)");
script_tag(name:"creation_date", value:"2018-09-12 10:20:22 +0530 (Wed, 12 Sep 2018)");
script_tag(name:"qod_type", value:"executable_version");
script_name("Microsoft .NET Framework RCE Vulnerability (KB4457034)");
script_tag(name:"summary", value:"This host is missing a critical security
update according to Microsoft KB4457034.");
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 within the
application when Microsoft .NET Framework processes untrusted input.");
script_tag(name:"impact", value:"Successful exploitation will allow remote
attackers to take control of an affected system. An attacker could then install
programs, view, change, delete data or create new accounts with full user rights.");
script_tag(name:"affected", value:"Microsoft .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Microsoft Windows 8.1 and Microsoft Windows Server 2012 R2.");
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_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/4457034");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/105222");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2018 Greenbone AG");
script_family("Windows : Microsoft Bulletins");
script_dependencies("smb_reg_service_pack.nasl");
script_mandatory_keys("SMB/WindowsVersion");
script_require_ports(139, 445);
exit(0);
}
include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");
include("secpod_smb_func.inc");
if(hotfix_check_sp(win8_1:1, win8_1x64:1, win2012R2:1) <= 0)
exit(0);
key = "SOFTWARE\Microsoft\.NETFramework";
if(!registry_key_exists(key:key))
exit(0);
NetPath = registry_get_sz(key:key, 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.workflow.runtime.dll");
if(!dllVer || dllVer !~ "^4\.[67]\.")
continue;
if(version_is_less(version:dllVer, test_version:"4.7.3180.0")) {
report = report_fixed_ver(file_checked:dotPath + "\system.workflow.runtime.dll",
file_version:dllVer, vulnerable_range:"4.6 - 4.7.3180.0");
security_message(port:0, data:report);
exit(0);
}
}
exit(99);
}
exit(0);
10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.4 High
AI Score
Confidence
High
0.373 Low
EPSS
Percentile
97.2%