sub checkForOpenProxy { my($self, $ip) = @_; # If we weren't passed an IP address, default to whatever # the current IP address is. if (!$ip && $ENV{GATEWAY_INTERFACE}) { my $r = Apache->request; $ip = $r->connection->remote_ip if $r; } # If we don't have an IP address, it can't be an open proxy. return 0 if !$ip; # Known secure IPs also don't count as open proxies. my $constants = getCurrentStatic(); my $gSkin = getCurrentSkin(); my $secure_ip_regex = $constants->{admin_secure_ip_regex}; return 0 if $secure_ip_regex && $ip =~ /$secure_ip_regex/; # If the IP address is already one we have listed, use the # existing listing. my $port = $self->getKnownOpenProxy($ip); if (defined $port) { #print STDERR scalar(localtime) . " cfop no need to check ip '$ip', port is '$port'\n"; return $port; } #print STDERR scalar(localtime) . " cfop ip '$ip' not known, checking\n"; # No known answer; probe the IP address and get an answer. my $ports = $constants->{comments_portscan_ports} || '80 8080 8000 3128'; my @ports = grep /^\d+$/, split / /, $ports; return 0 if !@ports; my $timeout = $constants->{comments_portscan_timeout} || 5; my $connect_timeout = int($timeout/scalar(@ports)+0.2); my $ok_url = "$gSkin->{absolutedir}/ok.txt"; my $pua = Slash::Custom::ParUserAgent->new(); $pua->redirect(1); $pua->max_redirect(3); $pua->max_hosts(scalar(@ports)); $pua->max_req(scalar(@ports)); $pua->timeout($connect_timeout); #use LWP::Debug; #use Data::Dumper; #LWP::Debug::level("+trace"); LWP::Debug::level("+debug"); my $start_time = Time::HiRes::time; local $_proxy_port = undef; sub _cfop_callback { my($data, $response, $protocol) = @_; #print STDERR scalar(localtime) . " _cfop_callback protocol '$protocol' port '$_proxy_port' succ '" . ($response->is_success()) . "' data '$data' content '" . ($response->is_success() ? $response->content() : "(fail)") . "'\n"; if ($response->is_success() && $data eq "ok\n") { # We got a success, so the IP is a proxy. # We should know the proxy's port at this # point; if not, that's remarkable, so # print an error. my $orig_req = $response->request(); $_proxy_port = $orig_req->{_slash_proxytest_port}; if (!$_proxy_port) { print STDERR scalar(localtime) . " _cfop_callback got data but no port, protocol '$protocol' port '$_proxy_port' succ '" . ($response->is_success()) . "' data '$data' content '" . $response->content() . "'\n"; } $_proxy_port ||= 1; # We can quit listening on any of the # other ports that may have connected, # returning immediately from the wait(). # So we want to return C_ENDALL. Except # C_ENDALL doesn't seem to _work_, it # crashes in _remove_current_connection. # Argh. So we use C_LASTCON. return LWP::Parallel::UserAgent::C_LASTCON; } #print STDERR scalar(localtime) . " _cfop_callback protocol '$protocol' succ '0'\n"; } #print STDERR scalar(localtime) . " cfop beginning registering\n"; for my $port (@ports) { # We switch to a new proxy every time thru. $pua->proxy('http', "http://$ip:$port/"); my $req = HTTP::Request->new(GET => $ok_url); $req->{_slash_proxytest_port} = $port; #print STDERR scalar(localtime) . " cfop registering for proxy '$pua->{proxy}{http}'\n"; $pua->register($req, \&_cfop_callback); } #print STDERR scalar(localtime) . "pua: " . Dumper($pua); my $elapsed = Time::HiRes::time - $start_time; my $wait_timeout = int($timeout - $elapsed + 0.5); $wait_timeout = 1 if $wait_timeout wait($wait_timeout); #print STDERR scalar(localtime) . " cfop done with wait, returning " . (defined $_proxy_port ? 'undef' : "'$port'") . "\n"; $_proxy_port = 0 if !$_proxy_port; $elapsed = Time::HiRes::time - $start_time; # Store this value so we don't keep probing the IP. $self->setKnownOpenProxy($ip, $_proxy_port, $elapsed); return $_proxy_port; }
(Score: 2) by NCommander on Wednesday April 09 2014, @11:49PM
You're right, it isn't an attack, but its bad practice to do it and not notify anyone you're doing it. It also triggers aggressive firewalls that detect it as an intrusion attempt (which is what the original reporter ran into). For a standard web application to be auto-scanning with no notification what so ever is a different beast, especially if it causes corporate firewalls to flag this site as malicious.
Still always moving