7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.146 Low
EPSS
Percentile
95.7%
This host is missing a critical security
update according to Microsoft Security Updates released for Microsoft Security
Essentials Protection Engine dated 12-01-2021
# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.817658");
script_version("2024-02-20T05:05:48+0000");
script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
script_cve_id("CVE-2021-1647");
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:"2024-02-20 05:05:48 +0000 (Tue, 20 Feb 2024)");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-01-14 19:28:00 +0000 (Thu, 14 Jan 2021)");
script_tag(name:"creation_date", value:"2021-01-13 08:24:09 +0530 (Wed, 13 Jan 2021)");
script_name("Microsoft Security Essentials Remote Code Execution Vulnerability (Jan 2021)");
script_tag(name:"summary", value:"This host is missing a critical security
update according to Microsoft Security Updates released for Microsoft Security
Essentials Protection Engine dated 12-01-2021");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present
on the target host");
script_tag(name:"insight", value:"The flaw exists while opening a malicious
document on a system where Microsoft Security Essentials is installed");
script_tag(name:"impact", value:"Successful exploitation will allow an attacker
to execute arbitrary code on affected system.");
script_tag(name:"affected", value:"Microsoft Security Essentials.");
script_tag(name:"solution", value:"Run the Windows Update to update the malware
protection engine to the latest version available. Typically, no action is
required as the built-in mechanism for the automatic detection and deployment
of updates will apply the update itself.");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"executable_version");
script_xref(name:"URL", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1647");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("Windows");
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");
key = "SOFTWARE\Microsoft\Microsoft Antimalware";
if(!registry_key_exists(key:key)){
exit(0);
}
def_version = registry_get_sz(key:"SOFTWARE\Microsoft\Microsoft Antimalware\Signature Updates",
item:"EngineVersion");
if(!def_version){
exit(0);
}
##First version of the Microsoft Malware Protection Engine with this vulnerability addressed 1.1.17700.4
if(version_is_less(version:def_version, test_version:"1.1.17700.4"))
{
report = report_fixed_ver(installed_version:def_version, fixed_version: "1.1.17700.4 or higher");
security_message(data:report);
exit(0);
}
exit(0);
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.146 Low
EPSS
Percentile
95.7%