Cisco ATA 187 Analog Telephone Adapter Unauthorized Access Security Bypass Vulnerability

# SPDX-FileCopyrightText: 2016 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

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140086");
  script_cve_id("CVE-2013-1111");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:C");
  script_version("2023-07-20T05:05:17+0000");

  script_name("Cisco ATA 187 Analog Telephone Adapter Unauthorized Access Security Bypass Vulnerability");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/57782");

  script_tag(name:"vuldetect", value:"Try to connect to TCP port 7870 and execute the `id` command.");

  script_tag(name:"insight", value:"The Cisco ATA 187 Analog Telephone Adaptor with firmware 9.2.1.0 and 9.2.3.1
  before ES build 4 does not properly implement access control, which allows remote attackers to execute
  operating-system commands via vectors involving a session on TCP port 7870");

  script_tag(name:"solution", value:"Updates are available.");

  script_tag(name:"summary", value:"Cisco ATA-187 is prone to a security-bypass vulnerability because it allows
  attackers to gain unauthorized access to the device.");

  script_tag(name:"affected", value:"An attacker can exploit this issue to view and modify the configuration of an
  affected device, thereby aiding in further attacks.");

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

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

  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"creation_date", value:"2016-12-01 14:36:57 +0100 (Thu, 01 Dec 2016)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_cisco_ata_consolidation.nasl");
  script_mandatory_keys("cisco/ata/detected");
  script_require_ports(7870);

  exit(0);
}

include("telnet_func.inc");

# nb: While the advisory says only ATA 187 is affected we still want to test
# all ATA devices to be sure that no other unknown devices are affected as well.
if( ! get_kb_item( "cisco/ata/detected" ) )
  exit( 0 );

port = 7870;
if( ! get_port_state( port ) ) exit( 0 );

soc = open_sock_tcp( port );
if( ! soc ) exit( 0 );

telnet_negotiate( socket:soc );

send( socket:soc, data:'id\n');

recv = recv( socket:soc, length:128 );

close( soc );

if( recv =~ "uid=[0-9]+.*gid=[0-9]+" )
{
  report = 'It was possible to execute the `id` command by connection to port `7870` of the remote device.\nResponse:\n' + recv + '\n';
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );