This script attempts to check a DNS server for the predictable-TXID
DNS recursion vulnerability.
This is a wrapper on the Nmap Security Scanner’s (http://nmap.org) dns-random-txid.nse.
###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_nmap_dns_random_txid.nasl 7006 2017-08-25 11:51:20Z teissa $
#
# Wrapper for Nmap DNS Random TXID NSE script.
#
# Authors:
# NSE-Script: Brandon Enright <[email protected]>
# NASL-Wrapper: Sooraj KS <[email protected]>
#
# Copyright:
# NSE-Script: The Nmap Security Scanner (http://nmap.org)
# NASL-Wrapper: Copyright (c) 2010 Greenbone Networks GmbH (http://www.greenbone.net)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################
tag_summary = "This script attempts to check a DNS server for the predictable-TXID
DNS recursion vulnerability.
This is a wrapper on the Nmap Security Scanner's (http://nmap.org) dns-random-txid.nse.";
if(description)
{
script_id(801689);
script_version("$Revision: 7006 $");
script_cve_id("CVE-2008-1447");
script_bugtraq_id(30131);
script_tag(name:"last_modification", value:"$Date: 2017-08-25 13:51:20 +0200 (Fri, 25 Aug 2017) $");
script_tag(name:"creation_date", value:"2011-01-06 14:34:14 +0100 (Thu, 06 Jan 2011)");
script_tag(name:"cvss_base", value:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
script_name("Nmap NSE: DNS Random TXID");
script_category(ACT_GATHER_INFO);
script_tag(name:"qod_type", value:"remote_analysis");
script_copyright("NSE-Script: The Nmap Security Scanner; NASL-Wrapper: Greenbone Networks GmbH");
script_family("Nmap NSE");
script_mandatory_keys("Tools/Present/nmap");
script_mandatory_keys("Tools/Launch/nmap_nse");
script_tag(name : "summary" , value : tag_summary);
exit(0);
}
## Required Keys
if((! get_kb_item("Tools/Present/nmap5.21") &&
! get_kb_item("Tools/Present/nmap5.51")) ||
! get_kb_item("Tools/Launch/nmap_nse")) {
exit(0);
}
## DNS Port
port = 53;
if(! get_udp_port_state(port)){
exit(0);
}
## Run nmap and Get the result
res = pread(cmd: "nmap", argv: make_list("nmap", "-sU", "--script=dns-random-txid.nse",
"-p", port, get_host_ip()));
if(res)
{
foreach line (split(res))
{
if(ereg(pattern:"^\|",string:line)) {
result += substr(chomp(line),2) + '\n';
}
error = eregmatch(string:line, pattern:"^nmap: (.*)$");
if (error) {
msg = string('Nmap command failed with following error message:\n', line);
log_message(data : msg, port:port);
}
}
if("dns-random-txid" >< result) {
msg = string('Result found by Nmap Security Scanner (dns-random-txid.nse) ',
'http://nmap.org:\n\n', result);
security_message(data : msg, port:port);
}
}
else
{
msg = string('Nmap command failed entirely:\n');
log_message(data : msg, port:port);
}