OTRS 4.x < 4.0.27, 5.x < 5.0.24, 6.x < 6.0.2 RCE Vulnerability (Dec 2017)

# SPDX-FileCopyrightText: 2017 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:otrs:otrs";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.112152");
  script_version("2025-07-17T05:43:33+0000");
  script_tag(name:"last_modification", value:"2025-07-17 05:43:33 +0000 (Thu, 17 Jul 2025)");
  script_tag(name:"creation_date", value:"2017-12-11 11:50:38 +0100 (Mon, 11 Dec 2017)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/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:"2021-04-22 18:15:00 +0000 (Thu, 22 Apr 2021)");

  script_cve_id("CVE-2017-16921");

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

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

  script_name("OTRS 4.x < 4.0.27, 5.x < 5.0.24, 6.x < 6.0.2 RCE Vulnerability (Dec 2017)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_otrs_http_detect.nasl");
  script_mandatory_keys("otrs/detected");

  script_tag(name:"summary", value:"OTRS 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:"An attacker who is logged into OTRS as an agent can manipulate
  form parameters and execute arbitrary shell commands with the permissions of the OTRS or web
  server user.");

  script_tag(name:"affected", value:"OTRS version 4.x through 4.0.26, 5.x through 5.0.24 and 6.x
  through 6.0.1.");

  script_tag(name:"solution", value:"Update to version 4.0.27, 5.0.25, 6.0.2 or later.");

  script_xref(name:"URL", value:"https://www.otrs.com/security-advisory-2017-09-security-update-otrs-framework/");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!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: "4.0.0", test_version2: "4.0.26")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.0.27", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "5.0.0", test_version2: "5.0.24")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.25", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "6.0.0", test_version2: "6.0.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.0.2", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);