Apache Log4j 2.x < 2.3.2, 2.4.x < 2.12.4, 2.13.x < 2.17.1 RCE Vulnerability (Dec 2021) - Linux

# SPDX-FileCopyrightText: 2022 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

CPE = "cpe:/a:apache:log4j";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.147377");
  script_version("2025-09-04T05:39:49+0000");
  script_tag(name:"last_modification", value:"2025-09-04 05:39:49 +0000 (Thu, 04 Sep 2025)");
  script_tag(name:"creation_date", value:"2022-01-10 07:09:53 +0000 (Mon, 10 Jan 2022)");
  script_tag(name:"cvss_base", value:"8.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-07-01 18:34:00 +0000 (Fri, 01 Jul 2022)");

  script_cve_id("CVE-2021-44832");

  script_tag(name:"qod_type", value:"executable_version_unreliable");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Apache Log4j 2.x < 2.3.2, 2.4.x < 2.12.4, 2.13.x < 2.17.1 RCE Vulnerability (Dec 2021) - Linux");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("General");
  script_dependencies("gb_apache_log4j_consolidation.nasl");
  script_mandatory_keys("apache/log4j/ssh-login/detected");

  script_tag(name:"summary", value:"Apache Log4j is prone to a remote code execution (RCE)
  vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"Apache Log4j2 is vulnerable to a remote code execution (RCE)
  attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an
  attacker has control of the target LDAP server.");

  script_tag(name:"affected", value:"Apache Log4j versions 2.0.x through 2.3.1, 2.4.x through
  2.12.3 and 2.13.x through 2.17.0.");

  script_tag(name:"solution", value:"Update to version 2.3.2, 2.12.4, 2.17.1 or later.");

  script_xref(name:"URL", value:"https://issues.apache.org/jira/browse/LOG4J2-3293");
  script_xref(name:"URL", value:"https://logging.apache.org/log4j/2.x/security.html");

  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: "2.0", test_version2: "2.3.1" ) ) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.3.2", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "2.4.0", test_version2: "2.12.3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.12.4", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "2.13.0", test_version2: "2.17.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.17.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);