SerVision HVG Default Credentials (HTTP)

# 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("1.3.6.1.4.1.25623.1.0.807072");
  script_version("2023-07-20T05:05:17+0000");
  script_cve_id("CVE-2015-0930");
  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:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"creation_date", value:"2016-02-16 16:15:07 +0530 (Tue, 16 Feb 2016)");
  script_tag(name:"qod_type", value:"remote_vul");
  script_name("SerVision HVG Default Credentials (HTTP)");

  script_tag(name:"summary", value:"SerVision HVG is using known default credentials.");

  script_tag(name:"vuldetect", value:"Send a crafted request via HTTP POST and
  check whether it is able to bypass authentication or not.");

  script_tag(name:"insight", value:"The flaw is due to SerVision HVG contains
  a hardcoded password that enables a user to log into the web interface with
  administrative rights.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  unauthenticated users to log into the web interface with administrative
  rights and gain administrative privileges on the device.");

  script_tag(name:"affected", value:"SerVision HVG400 Video Gateway devices with
  firmware before 2.2.26a100");

  script_tag(name:"solution", value:"Upgrade to SerVision HVG Video Gateway
  devices with firmware 2.2.26a100 or later.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_xref(name:"URL", value:"https://www.kb.cert.org/vuls/id/522460");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/72433");
  script_xref(name:"URL", value:"http://seclists.org/fulldisclosure/2016/Feb/57");

  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Default Accounts");
  script_dependencies("find_service.nasl", "httpver.nasl", "gb_default_credentials_options.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 8080);
  script_exclude_keys("Settings/disable_cgi_scanning", "default_credentials/disable_default_account_checks");

  exit(0);
}

if(get_kb_item("default_credentials/disable_default_account_checks"))
  exit(0);

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

hvgPort = http_get_port(default:8080);

url = "/index.htm";
buf = http_get_cache(item:url, port:hvgPort);

if('user_username' >< buf && 'user_password' >< buf)
{

  host = http_host_name(port:hvgPort);

  postData = string('user_username=admin&user_password=Bantham&LOADED=1&TO_LOAD=index.htm');

  req = string("POST ", url, " HTTP/1.1\r\n",
               "Host: ", host, "\r\n",
               "Content-Type: application/x-www-form-urlencoded\r\n",
               "Content-Length: ", strlen(postData), "\r\n",
               "\r\n", postData, "\r\n");
  res = http_send_recv(port:hvgPort, data:req);

  cookie = eregmatch( pattern:"Set-Cookie: ([0-9a-zA-Z=]+);", string:res );
  if(!cookie[1]){
    exit(0);
  }

  if (res && res =~ "^HTTP\/1\.[01] 201")
  {
    req = string("GET /top.htm HTTP/1.1\r\n",
                 "Host: ", host, "\r\n",
                 "Cookie: ", cookie[1], "\r\n",
                 "Connection: keep-alive\r\n\r\n");
    res = http_keepalive_send_recv(port:hvgPort, data:req);

    if(res =~ "^HTTP\/1\.[01] 200" && "Logout" >< res)
    {
      report = http_report_vuln_url( port:hvgPort, url:url );
      security_message(port:hvgPort, data:report);
      exit(0);
    }
  }
}