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%
Apache Log4j is prone to a remote code execution (RCE)
vulnerability in JMSAppender.
# 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:apache:log4j";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.147345");
script_version("2022-01-10T03:03:27+0000");
script_tag(name:"last_modification", value:"2022-01-10 03:03:27 +0000 (Mon, 10 Jan 2022)");
script_tag(name:"creation_date", value:"2021-12-16 06:59:43 +0000 (Thu, 16 Dec 2021)");
script_tag(name:"cvss_base", value:"6.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:P/I:P/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/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:"2022-01-06 13:45:00 +0000 (Thu, 06 Jan 2022)");
script_cve_id("CVE-2021-4104");
script_tag(name:"qod_type", value:"executable_version_unreliable");
script_tag(name:"solution_type", value:"WillNotFix");
script_name("Apache Log4j 1.2.x RCE Vulnerability (Linux/Unix, Dec 2021) - Version Check");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
script_family("General");
script_dependencies("gb_apache_log4j_consolidation.nasl", "os_detection.nasl");
script_mandatory_keys("apache/log4j/detected", "Host/runs_unixoide");
script_tag(name:"summary", value:"Apache Log4j is prone to a remote code execution (RCE)
vulnerability in JMSAppender.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"JMSAppender in Log4j 1.2 is vulnerable to deserialization of
untrusted data when the attacker has write access to the Log4j configuration. The attacker can
provide TopicBindingName and TopicConnectionFactoryBindingName configurations causing JMSAppender
to perform JNDI requests that result in remote code execution in a similar fashion to
CVE-2021-44228.
Note this issue only affects Log4j 1.2 when specifically configured to use JMSAppender, which is
not the default.");
script_tag(name:"affected", value:"Apache Log4j version 1.2.x.");
script_tag(name:"solution", value:"No solution was made available by the vendor.
Note: Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it
addresses numerous other issues from the previous versions.");
script_xref(name:"URL", value:"https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126");
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 =~ "^1\.2") {
report = report_fixed_ver(installed_version: version, fixed_version: "None", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
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%