PHP/FI php.cgi Traversal Arbitrary File Access

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(10177);
  script_version("1.41");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id("CVE-1999-0238");
  script_bugtraq_id(2250);

  script_name(english:"PHP/FI php.cgi Traversal Arbitrary File Access");

  script_set_attribute(attribute:"synopsis", value:
"Arbitrary files can be read on the remote server.");
  script_set_attribute(attribute:"description", value:
"'php.cgi' is installed. This CGI has a well known security flaw that 
lets an attacker read arbitrary files with the privileges of the HTTP
server.");
  script_set_attribute(attribute:"solution", value:
"Remove it from /cgi-bin.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"1997/09/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"1999/06/22");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:php:php");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 1999-2022 Tenable Network Security, Inc.");

  script_dependencies("http_version.nasl", "webmirror.nasl", "no404.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);

  exit(0);
}

#
# The script code starts here
#
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");


port = get_http_port(default:80);

foreach dir (cgi_dirs())
{
  u = string(dir, "/php.cgi?/etc/passwd");
  r = http_send_recv3(method:"GET", item: u, port:port);
  if (isnull(r)) exit(0);
  buf = strcat(r[0], r[1], '\r\n', r[2]);
  if(egrep(pattern:".*root:.*:0:[01]:.*", string:buf))
    security_warning(port, extra: strcat('The following URL will exhibit the flaw :\n\n', build_url(port: port, qs: u), '\n'));
}