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Java Secure Socket Extension (JSSE) SKIP-TLS MITM Proxy

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Java Secure Socket Extension (JSSE) SKIP-TLS MITM Proxy

Disclosed
01/20/2015
Created
05/30/2018

Description

This module exploits an incomplete internal state distinction in Java Secure Socket Extension (JSSE) by impersonating the server and finishing the handshake before the peers have authenticated themselves and instantiated negotiated security parameters, resulting in a plaintext SSL/TLS session with the client. This plaintext SSL/TLS session is then proxied to the server using a second SSL/TLS session from the proxy to the server (or an alternate fake server) allowing the session to continue normally and plaintext application data transmitted between the peers to be saved. This module requires an active man-in-the-middle attack.

Author(s)

  • Ramon de C Valle <rcvalle@metasploit.com>

Development

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/server/jsse_skiptls_mitm_proxy
msf auxiliary(jsse_skiptls_mitm_proxy) > show actions
    ...actions...
msf auxiliary(jsse_skiptls_mitm_proxy) > set ACTION < action-name >
msf auxiliary(jsse_skiptls_mitm_proxy) > show options
    ...show and set options...
msf auxiliary(jsse_skiptls_mitm_proxy) > run 

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security

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