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
9.7 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 Elasticsearch is prone to multiple vulnerabilities in
the Apache Log4j library.
# 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-or-later
CPE = "cpe:/a:elastic:elasticsearch";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.117851");
script_version("2023-05-18T09:08:59+0000");
script_tag(name:"last_modification", value:"2023-05-18 09:08:59 +0000 (Thu, 18 May 2023)");
script_tag(name:"creation_date", value:"2021-12-20 11:29:44 +0000 (Mon, 20 Dec 2021)");
script_tag(name:"cvss_base", value:"5.1");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:P/I:P/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/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:"2021-12-21 00:15:00 +0000 (Tue, 21 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-2021-45046", "CVE-2021-45105");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Elastic Elasticsearch Multiple Log4j Vulnerabilities (Dec 2021)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("General");
script_dependencies("gb_elastic_elasticsearch_detect_http.nasl");
script_mandatory_keys("elastic/elasticsearch/detected");
script_tag(name:"summary", value:"Elastic Elasticsearch 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-2021-45046: Denial of Service (DoS) and a possible remote code execution (RCE) in certain
non-default configurations.
CVE-2021-45105: Apache Log4j2 did not protect from uncontrolled recursion from self-referential
lookups. When the logging configuration uses a non-default Pattern Layout with a Context Lookup
(for example, $${ctx:loginId}), attackers with control over Thread Context Map (MDC) input data
can craft malicious input data that contains a recursive lookup, resulting in a StackOverflowError
that will terminate the process.");
script_tag(name:"impact", value:"The vendor states that there is no impact in all currently
supported versions with default configurations. To avoid unknown risks it is still recommended to
apply the updates or workarounds provided by the vendor.");
script_tag(name:"affected", value:"Elastic Elasticsearch version 5.x through 7.x.");
script_tag(name:"solution", value:"Update to version 6.8.22, 7.16.2 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/elasticsearch-5-0-0-5-6-10-and-6-0-0-6-3-2-log4j-cve-2021-44228-cve-2021-45046-remediation/292054");
script_xref(name:"URL", value:"https://logging.apache.org/log4j/2.x/security.html");
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: "6.8.21")) {
report = report_fixed_ver(installed_version: version, fixed_version: "6.8.22", install_path: location);
security_message(port: port, data: report);
exit(0);
}
if (version_in_range(version: version, test_version: "7.0", test_version2: "7.16.1")) {
report = report_fixed_ver(installed_version: version, fixed_version: "7.16.2", 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/elasticsearch-5-0-0-5-6-10-and-6-0-0-6-3-2-log4j-cve-2021-44228-cve-2021-45046-remediation/292054
logging.apache.org/log4j/2.x/security.html
www.cisa.gov/known-exploited-vulnerabilities-catalog
www.lunasec.io/docs/blog/log4j-zero-day-update-on-cve-2021-45046/
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
9.7 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%