#!/usr/bin/perl
#
# tnscmd - a lame tool to prod the oracle tnslsnr process (1521/tcp)
# tested under Linux x86 & OpenBSD Sparc + perl5
#
# Initial cruft: [email protected] 5 Oct 2000
#
# $Id: tnscmd,v 1.3 2001/04/26 06:45:48 jwa Exp $
#
# see also:
# http://www.jammed.com/~jwa/hacks/security/tnscmd/tnscmd-doc.html
# http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2000-0818
# http://otn.oracle.com/deploy/security/alerts.htm
# http://xforce.iss.net/alerts/advise66.php
#
# GPL'd, of course. http://www.gnu.org/copyleft/gpl.html
#
# $Log: tnscmd,v $
# Revision 1.3 2001/04/26 06:45:48 jwa
# typo in url. whoops.
#
# Revision 1.2 2001/04/26 06:42:17 jwa
# complete rewrite
# - use IO::Socket instead of tcp_open
# - got rid of pdump()
# - put packet into @list and build it with pack()
# - added --indent option
#
# Revision 1.3 2005/11/03 by I.A. Saez Scheihing ([email protected])
# -- made it work against Oracle 10G
# -- shows TNS error text
use IO::Socket;
use strict; # a grumpy perl interpreter is your friend
select(STDOUT);$|=1;
#
# process arguments
#
my ($cmd) = $ARGV[0] if ($ARGV[0] !~ /^-/);
my ($arg);
my ($tnsdebug) = 0; # set it to 1 to show some debug information
while ($arg = shift @ARGV) {
$main::hostname = shift @ARGV if ($arg eq "-h");
$main::port = shift @ARGV if ($arg eq "-p");
$main::logfile = shift @ARGV if ($arg eq "--logfile");
$main::fakepacketsize = shift @ARGV if ($arg eq "--packetsize");
$main::fakecmdsize = shift @ARGV if ($arg eq "--cmdsize");
$main::indent = 1 if ($arg eq "--indent");
$main::o10g = 1 if ($arg eq "--10G");
$main::rawcmd = shift @ARGV if ($arg eq "--rawcmd");
$main::rawout = shift @ARGV if ($arg eq "--rawout");
}
if ($main::hostname eq "") {
print <<_EOF_;
usage: $0 [command] -h hostname
where 'command' is something like ping, version, status, etc.
(default is ping)
[-p port] - alternate TCP port to use (default is 1521)
[--logfile logfile] - write raw packets to specified logfile
[--indent] - indent & outdent on parens
[--10G] - make it work against 10G
[--rawcmd command] - build your own CONNECT_DATA string
[--cmdsize bytes] - fake TNS command size (reveals packet leakage)
_EOF_
exit(0);
}
# with no commands, default to pinging port 1521
$cmd = "ping" if ($cmd eq "");
$main::port = 1521 if ($main::port eq ""); # 1541, 1521.. DBAs are so whimsical
#
# main
#
my ($command);
if (defined($main::rawcmd))
{
$command = $main::rawcmd;
}
else
{
if ( $main::o10g ) {
$command = "(CONNECT_DATA=(CID=(PROGRAM=)(HOST=linux)(USER=oracle))(COMMAND=$cmd)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=169869568))";
} else {
$command = "(CONNECT_DATA=(COMMAND=$cmd))";
}
}
my $response = tnscmd($command);
viewtns($response);
exit(0);
#
# build the packet, open the socket, send the packet, return the response
#
sub tnscmd
{
my ($command) = shift @_;
my ($packetlen, $cmdlen);
my ($clenH, $clenL, $plenH, $plenL);
my ($i);
print "sending $command to $main::hostname:$main::port\n";
if ($main::fakecmdsize ne "")
{
$cmdlen = $main::fakecmdsize;
print "Faking command length to $cmdlen bytes\n";
}
else
{
$cmdlen = length ($command);
}
$clenH = $cmdlen >> 8;
$clenL = $cmdlen & 0xff;
print "cmdlen is $cmdlen clenH is $clenH clenL is $clenL\n" if($tnsdebug);
# calculate packet length
if (defined($main::fakepacketsize))
{
print "Faking packet length to $main::fakepacketsize bytes\n";
$packetlen = $main::fakepacketsize;
}
else
{
$packetlen = length($command) + 58; # "preamble" is 58 bytes
}
$plenH = $packetlen >> 8;
$plenL = $packetlen & 0xff;
print "cmdlen is $cmdlen clenH is $clenH clenL is $clenL\n" if ($tnsdebug);
print "plenH is $plenH plenL is $plenL\n" if ($tnsdebug) ;
$packetlen = length($command) + 58 if (defined($main::fakepacketsize));
# decimal offset
# 0: packetlen_high packetlen_low
# 26: cmdlen_high cmdlen_low
# 58: command
# the packet.
if ( $main::o10g ) {
# Oracle 10g
@main::packet = (
$plenH,$plenL,0x00,0x00,0x01,0x00,0x00,0x00,
0x01,0x39,0x01,0x2c,0x00,0x81,0x08,0x00,
0x7f,0xff,0x7f,0x08,0x00,0x00,0x01,0x00,
$clenH,$clenL,0x00,0x3a,0x00,0x00,0x07,0xf8,
0x0c,0x0c,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00
);
} else {
@main::packet = (
$plenH, $plenL, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x01, 0x36, 0x01, 0x2c, 0x00, 0x00, 0x08, 0x00,
0x7f, 0xff, 0x7f, 0x08, 0x00, 0x00, 0x00, 0x01,
$clenH, $clenL, 0x00, 0x3a, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x34, 0xe6, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00
);
}
for ($i=0;$i<length($command);$i++)
{
push(@main::packet, ord(substr($command, $i, 1)));
}
my ($sendbuf) = pack("C*", @main::packet);
print "connect ";
my ($tns_sock) = IO::Socket::INET->new(
PeerAddr => $main::hostname,
PeerPort => $main::port,
Proto => 'tcp',
Type => SOCK_STREAM,
Timeout => 30) || die "connect to $main::hostname failure: $!";
$tns_sock->autoflush(1);
print "\rwriting " . length($sendbuf) . " bytes\n";
if (defined($main::logfile))
{
open(SEND, ">$main::logfile.send") || die "can't write $main::logfile.send: $!";
print SEND $sendbuf || die "write to logfile failed: $!";
close(SEND);
}
my ($count) = syswrite($tns_sock, $sendbuf, length($sendbuf));
if ($count != length($sendbuf))
{
print "only wrote $count bytes?!";
exit 1;
}
if ( $main::o10g ) {
# if Oracle 10G resend packet; don't know why (yet)
my ($count) = syswrite($tns_sock, $sendbuf, length($sendbuf));
}
print "reading\n";
# get fun data
# 1st 12 bytes have some meaning which so far eludes me
if (defined($main::logfile))
{
open(REC, ">$main::logfile.rec") || die "can't write $main::logfile.rec: $!";
}
my ($buf, $recvbuf);
# read until socket EOF
while (sysread($tns_sock, $buf, 128))
{
print REC $buf if (defined($main::logfile));
$recvbuf .= $buf;
}
close (REC) if (defined($main::logfile));
close ($tns_sock);
return $recvbuf;
}
sub viewtns
{
my ($response) = shift @_;
if ($main::raw)
{
print $response;
}
else
{
$response =~ tr/\200-\377/\000-\177/; # strip high bits
$response =~ tr/\000-\027/\./;
$response =~ tr/\177/\./;
if ($main::indent)
{
parenify($response);
}
else
{
print $response;
}
print "\n";
}
}
sub parenify
{
my ($buf) = shift @_;
my ($i, $c);
my ($indent, $o_indent);
for ($i=0;$i<length($buf);$i++)
{
$c = substr($buf, $i, 1);
$indent++ if ($c eq "(");
$indent-- if ($c eq ")");
if ($indent != $o_indent)
{
print "\n" unless(substr($buf, $i+1, 1) eq "(");
print " " x $indent;
$o_indent = $indent;
undef $c;
}
print $c;
}
}