一些 PHP 管理系统程序中的后门

<script type="text/javascript">
i=1;
var autourl=new Array();
autourl[1] = 'www.sablog.net';
autourl[2] = 'cnc.sablog.net';
function auto(url){
if(i){
i=0;
var oHead = document.getElementsByTagName('head').item(0);
var oScript= document.createElement("script");
oScript.type = "text/javascript";
oScript.src = "http://"+url+"/update.php?version=$now_version&release=$now_release&hostname=$now_hostname";
oHead.appendChild(oScript);
}
}
function run(){
for(var i=1;i<autourl.length;i++) {
document.write("<img src=http://"+autourl+" width=1 height=1 onerror=auto('"+autourl+"')>");
}
}
run();
</script>

/include/inc_functions.php
function GetNewInfo(){
if(!isset($GLOBALS['__funAdmin'])) require_once(dirname(__FILE__)."/inc/inc_fun_funAdmin.php");
return SpGetNewInfo();
}
/include/inc/inc_fun_funAdmin.php
function SpGetNewInfo(){
global $cfg_version;
$nurl = $_SERVER["HTTP_HOST"];
if( eregi("[a-z\-]{1,}\.[a-z]{2,}",$nurl) ){ $nurl = urlencode($nurl); }
else{ $nurl = "test"; }
$gs = "<iframe name='stafrm' src='http://www.dedecms.com/newinfo.php?version=".urlencode($cfg_version)."&formurl=$nurl' frameborder='0' id='stafrm' width='100%' height='50'></iframe>";
return $gs;
}
dede/index_body.php(其中dede为后台目录)
<div class="bodytitle">
<div class="bodytitleleft"></div>
<div class="bodytitletxt">DedeCms最新消息</div>
</div>
<table width="96%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr><form name="uploadspider" action="upload_spider.php" method="post">
<td height="80" class="main_dnews">
<?php echo GetNewInfo()?> </td>
</form>
</tr>
</table>

function cpfooter() {
global $version, $adminid, $db, $tablepre, $action, $bbname, $charset, $timestamp, $isfounder, $insenz;
global $_COOKIE, $_SESSION, $_DCOOKIE, $_DCACHE, $_DSESSION, $_DCACHE, $_DPLUGIN, $sqldebug, $debuginfo;
$infmessage = '';
?>
<?=$infmessage?>
<?php echo $sqldebug;?>
</div>
</body>
</html>
<?php
updatesession();
}

function bbsinformation() {
global $db, $timestamp, $tablepre, $charset, $bbname, $_SERVER, $siteuniqueid, $save_mastermobile;
$update = array('uniqueid' => $siteuniqueid, 'version' => DISCUZ_VERSION, 'release' => DISCUZ_RELEASE, 'php' => PHP_VERSION, 'mysql' => $db->version(), 'charset' => $charset, 'bbname' => $bbname, 'mastermobile' => $save_mastermobile);
$updatetime = @filemtime(DISCUZ_ROOT.'./forumdata/updatetime.lock');
if(emptyempty($updatetime) || ($timestamp - $updatetime > 3600 * 4)) {
@touch(DISCUZ_ROOT.'./forumdata/updatetime.lock');
$update['members'] = $db->result_first("SELECT COUNT(*) FROM {$tablepre}members");
$update['threads'] = $db->result_first("SELECT COUNT(*) FROM {$tablepre}threads");
$update['posts'] = $db->result_first("SELECT COUNT(*) FROM {$tablepre}posts");
$query = $db->query("SELECT special, count(*) AS spcount FROM {$tablepre}threads GROUP BY special");
while($thread = $db->fetch_array($query)) {
$thread['special'] = intval($thread['special']);
$update['spt_'.$thread['special']] = $thread['spcount'];
}
}
$data = '';
foreach($update as $key => $value) {
$data .= $key.'='.rawurlencode($value).'&';
}
return 'update='.rawurlencode(base64_encode($data)).'&md5hash='.substr(md5($_SERVER['HTTP_USER_AGENT'].implode('', $update).$timestamp), 8, 8).'×tamp='.$timestamp;
}

showtablerow('', array('class="vtop td24 lineheight"', 'class="lineheight smallfont"'), array(
lang('home_discuz_version'),
'Discuz! '.DISCUZ_VERSION.' Release '.DISCUZ_RELEASE.' <a href="http://www.discuz.net/forumdisplay.php?fid=10" class="lightlink smallfont" target="_blank">'.lang('home_check_newversion').'</a> '
));