### 简要描述：
74CMS 最新版二次SQL注入多出可越权操作
### 详细说明：
74CMS最新版：74cms_v3.4.20140820 官方8.20号更新
文件：/user/personal/personal_resume.php
```
//保存-求职意向
elseif ($act=='make2_save')
{
$resumeuid=intval($_SESSION['uid']);
$resumepid=intval($_REQUEST['pid']);
if ($resumeuid==0 || $resumepid==0 ) showmsg('参数错误！',1);
$resumearr['recentjobs']=trim($_POST['recentjobs']);
$resumearr['nature']=intval($_POST['nature'])?intval($_POST['nature']):showmsg('请选择期望岗位性质！',1);
$resumearr['nature_cn']=trim($_POST['nature_cn']);
$resumearr['district']=trim($_POST['district'])?intval($_POST['district']):showmsg('请选择期望工作地！',1);
$resumearr['sdistrict']=intval($_POST['sdistrict']);
$resumearr['district_cn']=trim($_POST['district_cn']);
$resumearr['wage']=intval($_POST['wage'])?intval($_POST['wage']):showmsg('请选择期望月薪！',1);
$resumearr['wage_cn']=trim($_POST['wage_cn']);
$resumearr['trade']=$_POST['trade']?trim($_POST['trade']):showmsg('请选择期望从事的行业！',1);
$resumearr['trade_cn']=trim($_POST['trade_cn']);
$resumearr['intention_jobs']=trim($_POST['intention_jobs']);
if ($_CFG['audit_edit_resume']!="-1")
{
$resumearr['audit']=$_CFG['audit_edit_resume'];
}
add_resume_jobs($resumepid,$_SESSION['uid'],$_POST['intention_jobs_id'])?"":showmsg('更新失败！',0);
updatetable(table('resume'),$resumearr," id='{$resumepid}' AND uid='{$resumeuid}'");
updatetable(table('resume_tmp'),$resumearr," id='{$resumepid}' AND uid='{$resumeuid}'");
check_resume($_SESSION['uid'],intval($_REQUEST['pid']));
if ($_POST['go_resume_show'])
{
header("Location: ?act=resume_show&pid={$resumepid}");
}
else
{
header("Location: ?act=make3&pid=".intval($_POST['pid']));
}
}
```
这里插入了求职意向，主要这里的职位信息：recentjobs
```
//创建简历-技能特行
elseif ($act=='make3_save')
{
if (intval($_POST['pid'])==0 ) showmsg('参数错误！',1);
$setsqlarrspecialty['specialty']=!empty($_POST['specialty'])?$_POST['specialty']:showmsg('请填写您的技能特长！',1);
$_CFG['audit_edit_resume']!="-1"?$setsqlarrspecialty['audit']=intval($_CFG['audit_edit_resume']):"";
updatetable(table('resume'),$setsqlarrspecialty," id='".intval($_POST['pid'])."' AND uid='".intval($_SESSION['uid'])."'");
updatetable(table('resume_tmp'),$setsqlarrspecialty," id='".intval($_POST['pid'])."' AND uid='".intval($_SESSION['uid'])."'");
check_resume($_SESSION['uid'],intval($_REQUEST['pid']));
if ($_POST['go_resume_show'])
{
header("Location: ?act=resume_show&pid={$_POST['pid']}");
}
else
{
header("Location: ?act=make4&pid=".intval($_POST['pid']));
}
}
```
这里更新了技能特长：specialty
最后在文件：/include/fun_personal.php
```
//检查简历的完成程度
function check_resume($uid,$pid)
{
global $db,$timestamp,$_CFG;
$uid=intval($uid);
$pid=intval($pid);
$percent=0;
......省略
if ($percent>=60)
{
$j=get_resume_basic($uid,$pid);
$searchtab['sex']=$j['sex'];
$searchtab['nature']=$j['nature'];
$searchtab['marriage']=$j['marriage'];
$searchtab['experience']=$j['experience'];
$searchtab['district']=$j['district'];
$searchtab['sdistrict']=$j['sdistrict'];
$searchtab['wage']=$j['wage'];
$searchtab['education']=$j['education'];
$searchtab['photo']=$j['photo'];
$searchtab['refreshtime']=$j['refreshtime'];
$searchtab['talent']=$j['talent'];
updatetable(table('resume_search_rtime'),$searchtab,"uid='{$uid}' AND id='{$pid}'");
$searchtab['key']=$j['key'];
$searchtab['likekey']=$j['intention_jobs'].','.$j['recentjobs'].','.$j['specialty'].','.$j['fullname'];
updatetable(table('resume_search_key'),$searchtab,"uid='{$uid}' AND id='{$pid}'");
unset($searchtab);
```
这里从简历信息里取出来了信息
注意这里：
```
$searchtab['likekey']=$j['intention_jobs'].','.$j['recentjobs'].','.$j['specialty'].','.$j['fullname'];
```
这里的recentjobs，specialty，就是上面插入简历信息里面的recentjobs，specialty，这里取出来后，有进入了updatetable：
```
updatetable(table('resume_search_key'),$searchtab,"uid='{$uid}' AND id='{$pid}'");
```
这里是更新搜索关键字的
最后来看看updatetable函数：
```
function updatetable($tablename, $setsqlarr, $wheresqlarr, $silent=0) {
global $db;
$setsql = $comma = '';
foreach ($setsqlarr as $set_key => $set_value) {
if(is_array($set_value)) {
$setsql .= $comma.'`'.$set_key.'`'.'='.$set_value[0];
} else {
$setsql .= $comma.'`'.$set_key.'`'.'=\''.$set_value.'\'';
}
$comma = ', ';
}
$where = $comma = '';
if(empty($wheresqlarr)) {
$where = '1';
} elseif(is_array($wheresqlarr)) {
foreach ($wheresqlarr as $key => $value) {
$where .= $comma.'`'.$key.'`'.'=\''.$value.'\'';
$comma = ' AND ';
}
} else {
$where = $wheresqlarr;
}
//echo "UPDATE ".($tablename)." SET ".$setsql." WHERE ".$where, $silent?"SILENT":"";
return $db->query("UPDATE ".($tablename)." SET ".$setsql." WHERE ".$where, $silent?"SILENT":"");
}
```
将参数直接进入SQL语句，没有经过过滤。
总结：
1、求职职位和技能特长进入数据库，可带入恶意sql语句
2、从简历信息里取出来职位及特长
3、再次进入数据库，没有过滤，恶意SQL语句进入数据库
4、导致二次sql注入
这里的求职职位，技能特长，姓名三处都存在二次注入
这里通过截断即可更新任意用户的信息了
### 漏洞证明：
1、在求职职位中输入
[<img src="https://images.seebug.org/upload/201408/31133313a920cb073596f1398f36810be0239b94.png" alt="444.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201408/31133313a920cb073596f1398f36810be0239b94.png)
2、在技能特长处输入
[<img src="https://images.seebug.org/upload/201408/31133348f805490927e7032abe335ae52812bfa9.png" alt="555.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201408/31133348f805490927e7032abe335ae52812bfa9.png)
3、最后看看是否执行成功：
[<img src="https://images.seebug.org/upload/201408/31133421bd113420faf5a88c1a4669979d16ed3e.png" alt="666.png" width="600" onerror="javascript:errimg(this);">](https://images.seebug.org/upload/201408/31133421bd113420faf5a88c1a4669979d16ed3e.png)
数据库中likekey成功被修改，恶意sql语句成功执行
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