10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10 High
AI Score
Confidence
High
9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.976 High
EPSS
Percentile
100.0%
Elastic Logstash is prone to multiple vulnerabilities in
the Apache Log4j library.
# Copyright (C) 2021 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.
CPE = "cpe:/a:elastic:logstash";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.147312");
script_version("2022-08-09T10:11:17+0000");
script_tag(name:"last_modification", value:"2022-08-09 10:11:17 +0000 (Tue, 09 Aug 2022)");
script_tag(name:"creation_date", value:"2021-12-13 05:03:51 +0000 (Mon, 13 Dec 2021)");
script_tag(name:"cvss_base", value:"9.3");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-12-14 01:15:00 +0000 (Tue, 14 Dec 2021)");
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-2021-44228", "CVE-2021-45046");
# The Logstash version might differ from the Elasticsearch version detected
# by gb_elastic_elasticsearch_detect_http.nasl
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Elastic Logstash Multiple Log4j Vulnerabilities (ESA-2021-31, Log4Shell)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
script_family("Web application abuses");
script_dependencies("gb_elastic_elasticsearch_detect_http.nasl");
script_mandatory_keys("elastic/logstash/detected");
script_tag(name:"summary", value:"Elastic Logstash is prone to multiple vulnerabilities in
the Apache Log4j library.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The following vulnerabilities exist:
CVE-2021-44228: Apache Log4j2 JNDI features used in configuration, log messages, and parameters do
not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can
control log messages or log message parameters can execute arbitrary code loaded from LDAP servers
when message lookup substitution is enabled. This vulnerability is dubbed 'Log4Shell'.
CVE-2021-45046: Denial of Service (DoS) and a possible remote code execution (RCE) in certain
non-default configurations.");
script_tag(name:"impact", value:"The vendor states that there is no impact for CVE-2021-45046 in
all currently supported versions with default configurations. To avoid unknown risks it is still
recommended to apply the update provided by the vendor.");
script_tag(name:"affected", value:"Elastic Logstash version 5.x through 7.x.");
script_tag(name:"solution", value:"Update to version 6.8.21, 7.16.1 or later.");
script_xref(name:"URL", value:"https://discuss.elastic.co/t/apache-log4j2-remote-code-execution-rce-vulnerability-cve-2021-44228-esa-2021-31/291476");
script_xref(name:"URL", value:"https://discuss.elastic.co/t/logstash-5-0-0-6-8-20-and-7-0-0-7-16-0-log4j-cve-2021-44228-cve-2021-45046-remediation/292343");
script_xref(name:"URL", value:"https://github.com/advisories/GHSA-jfh8-c2jp-5v3q");
script_xref(name:"URL", value:"https://www.openwall.com/lists/oss-security/2021/12/10/1");
script_xref(name:"URL", value:"https://www.lunasec.io/docs/blog/log4j-zero-day/");
script_xref(name:"URL", value:"https://www.lunasec.io/docs/blog/log4j-zero-day-update-on-cve-2021-45046/");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if (isnull(port = get_app_port(cpe: CPE)))
exit(0);
if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
exit(0);
version = infos["version"];
location = infos["location"];
if (version_in_range(version: version, test_version: "5.0", test_version2: "6.8.20")) {
report = report_fixed_ver(installed_version: version, fixed_version: "6.8.21", install_path: location);
security_message(port: port, data: report);
exit(0);
}
if (version_in_range(version: version, test_version: "7.0", test_version2: "7.16.0")) {
report = report_fixed_ver(installed_version: version, fixed_version: "7.16.1", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
discuss.elastic.co/t/apache-log4j2-remote-code-execution-rce-vulnerability-cve-2021-44228-esa-2021-31/291476
discuss.elastic.co/t/logstash-5-0-0-6-8-20-and-7-0-0-7-16-0-log4j-cve-2021-44228-cve-2021-45046-remediation/292343
github.com/advisories/GHSA-jfh8-c2jp-5v3q
www.cisa.gov/known-exploited-vulnerabilities-catalog
www.lunasec.io/docs/blog/log4j-zero-day-update-on-cve-2021-45046/
www.lunasec.io/docs/blog/log4j-zero-day/
www.openwall.com/lists/oss-security/2021/12/10/1
Known Exploited Vulnerability (KEV) catalog
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10 High
AI Score
Confidence
High
9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.976 High
EPSS
Percentile
100.0%