Kanboard Default Credentials (HTTP)

# SPDX-FileCopyrightText: 2015 SCHUTZWERK 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

CPE = "cpe:/a:kanboard:kanboard";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.111064");
  script_version("2023-07-11T05:06:07+0000");
  script_tag(name:"last_modification", value:"2023-07-11 05:06:07 +0000 (Tue, 11 Jul 2023)");
  script_tag(name:"creation_date", value:"2015-12-04 13:00:00 +0100 (Fri, 04 Dec 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_name("Kanboard Default Credentials (HTTP)");

  script_category(ACT_ATTACK);

  script_family("Default Accounts");
  script_copyright("Copyright (C) 2015 SCHUTZWERK GmbH");
  script_dependencies("sw_kanboard_http_detect.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("kanboard/http/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"The remote Kanboard web interface is using known default
  credentials.");

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

  script_tag(name:"vuldetect", value:"Try to login with default credentials.");

  script_tag(name:"insight", value:"It was possible to login with default credentials: admin/admin");

  script_tag(name:"solution", value:"Change the password.");

  script_tag(name:"solution_type", value:"Workaround");
  script_tag(name:"qod_type", value:"remote_app");
  exit(0);
}

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

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

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

if( ! dir = get_app_location( cpe:CPE, port:port ) )
  exit( 0 );

if( dir == "/" )
  dir = "";

controllers = make_list( dir + "/?controller=auth",
                         dir + "/?controller=user" );

foreach controller( controllers ) {

  req = http_get( item:controller + "&action=login", port:port );
  res = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

  cookie = eregmatch( pattern:"KB_SID=([0-9a-zA-Z%-]+);", string:res );
  if( isnull( cookie[1] ) ) {
    cookie = eregmatch( pattern:"__S=([0-9a-zA-Z%-]+);.*__S=([0-9a-zA-Z%-]+);", string:res );
    # nb: some versions are sending two same named cookies so choosing the second one
    if( ! isnull( cookie[2] ) ) {
      cookie[0] = "__S=" + cookie[2];
    } else {
      cookie = eregmatch( pattern:"__S=([0-9a-zA-Z%-]+);", string:res );
    }
  }

  csrftoken = eregmatch( pattern:'name="csrf_token" value="([0-9a-z]+)"', string:res );

  host = http_host_name( port:port );
  useragent = http_get_user_agent();

  if( isnull( csrftoken[1] ) ) {
    data = string( "username=admin&password=admin&remember_me=0" );
  } else {
    data = string( "csrf_token=" + csrftoken[1] + "&username=admin&password=admin&remember_me=0" );
  }

  len = strlen( data );

  req = "POST " + controller + '&action=check 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' +
        'Accept-Language: en-US,en;q=0.5\r\n' +
        "Cookie: " + cookie[0] + '\r\n' +
        'Content-Type: application/x-www-form-urlencoded\r\n' +
        "Content-Length: " + len + '\r\n' +
        '\r\n' +
        data;
  res = http_keepalive_send_recv( port:port, data:req );

  req = "GET " + dir + '/?controller=config&action=index 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' +
        'Accept-Language: en-US,en;q=0.5\r\n' +
        "Cookie: " + cookie[0] + '\r\n' +
        'Content-Type: application/x-www-form-urlencoded\r\n' +
        '\r\n';
  res = http_keepalive_send_recv( port:port, data:req );

  if( "<title>Settings" >< res || "Logout</a>" >< res ) {
    report = 'It was possible to login at "' + dir + '" using the following credentials:\n\nadmin:admin\n';
    security_message( port:port, data:report );
    exit( 0 );
  }
}

exit( 99 );