APC / APCu INFO Page Accessible (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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.111025");
  script_version("2023-12-14T05:05:32+0000");
  script_tag(name:"last_modification", value:"2023-12-14 05:05:32 +0000 (Thu, 14 Dec 2023)");
  script_tag(name:"creation_date", value:"2015-07-27 16:00:00 +0200 (Mon, 27 Jul 2015)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_name("APC / APCu INFO Page Accessible (HTTP)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2015 SCHUTZWERK GmbH");
  script_family("Web application abuses");
  # nb: Don't add a dependency to "gb_php_http_detect.nasl" as this would cause a dependency cycle
  # because that VT has a dependency to this one.
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"summary", value:"HTTP based detection of an exposed APC / APCu INFO page.");

  script_tag(name:"insight", value:"The APC / APCu INFO page is providing internal information
  about the system.");

  script_tag(name:"impact", value:"Some of the information that could be gathered from this file
  includes: The running APC/APCu version, the PHP version, the webserver version.");

  script_tag(name:"solution", value:"Delete them or restrict access to the listened files.");

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

  exit(0);
}

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

global_var isvuln, report;

function check_and_set_phpinfo( url, host, port ) {

  local_var url, host, port, res;

  res = http_get_cache( item:url, port:port );
  if( ! res ) return;

  if( res =~ "^HTTP/1\.[01] 200" && ( "<title>APC INFO" >< res || "<title>APCu INFO" >< res ) ) {
    isvuln  = TRUE;
    report += '\n' + http_report_vuln_url( port:port, url:url, url_only:TRUE );

    # <tr class=tr-1><td class=td-0>PHP Version</td><td>7.0.30-0+deb9u1</td></tr>
    vers = eregmatch( pattern:">PHP Version</td><td>([.0-9A-Za-z]+).*</td></tr>", string:res );
    if( ! isnull( vers[1] ) ) {
      # nb: For later use/evaluation in gb_php_detect.nasl in the case no PHP or its version was detected from the banner
      set_kb_item( name:"php/banner/from_scripts/" + host + "/" + port + "/urls", value:url );
      replace_kb_item( name:"php/banner/from_scripts/" + host + "/" + port + "/short_versions/" + url, value:vers[1] );
      vers = eregmatch( pattern:">PHP Version</td><td>([^<]+)</td></tr>", string:res );
      if( ! isnull( vers[1] ) )
        replace_kb_item( name:"php/banner/from_scripts/" + host + "/" + port + "/full_versions/" + url, value:vers[1] );
    }
  }
  return;
}

report = 'The following files are providing a APC / APCu INFO page which disclose potentially sensitive information:\n';
files  = make_list( "/index.php", "/apc.php", "/apcu.php", "/apcinfo.php" );

port = http_get_port( default:80 );

# nb: Don't use http_can_host_php() here as this VT is reporting PHP as well
# and http_can_host_php() could fail if no PHP was detected before...

host = http_host_name( dont_add_port:TRUE );

foreach dir( make_list_unique( "/", "/apc", "/cache", http_cgi_dirs( port:port ) ) ) {

  if( dir == "/" ) dir = "";
  foreach file( files ) {
    url = dir + file;
    check_and_set_phpinfo( url:url, host:host, port:port );
  }
}

if( isvuln ) {
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );