Android Debug Bridge (ADB) Accessible Without Authentication

# Copyright (C) 2018 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:/o:google:android";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108450");
  script_version("2022-12-02T10:11:16+0000");
  script_tag(name:"last_modification", value:"2022-12-02 10:11:16 +0000 (Fri, 02 Dec 2022)");
  script_tag(name:"creation_date", value:"2018-07-06 14:37:42 +0200 (Fri, 06 Jul 2018)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_name("Android Debug Bridge (ADB) Accessible Without Authentication");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone Networks GmbH");
  script_family("Gain a shell remotely");
  script_dependencies("gb_android_adb_detect.nasl");
  script_mandatory_keys("adb/noauth");

  script_xref(name:"URL", value:"https://doublepulsar.com/root-bridge-how-thousands-of-internet-connected-android-devices-now-have-no-security-and-are-b46a68cb0f20");
  script_xref(name:"URL", value:"https://nelenkov.blogspot.com/2013/02/secure-usb-debugging-in-android-422.html");

  script_tag(name:"summary", value:"The script checks if the target host is running a service supporting the
  Android Debug Bridge (ADB) protocol without an enabled authentication.");

  script_tag(name:"impact", value:"This issue may be exploited by a remote attacker to gain
  access to sensitive information or modify system configuration.");

  script_tag(name:"vuldetect", value:"Evaluate if the target host is running a service supporting the
  Android Debug Bridge (ADB) protocol without an enabled authentication.");

  script_tag(name:"solution", value:"Disable the Android Debug Bridge (ADB)protocol within the
  device setting or enable authentication. See the references for more information.");

  script_tag(name:"qod_type", value:"remote_banner");
  script_tag(name:"solution_type", value:"Mitigation");

  exit(0);
}

include("host_details.inc");

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

if( ! get_app_location( cpe:CPE, port:port, nofork:TRUE ) ) # nb: To have a reference to the Detection-VT
  exit( 0 );

if( ! get_kb_item( "adb/" + port + "/noauth" ) )
  exit( 99 );

security_message( port:port );
exit( 0 );