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OpenSSL DTLS Fragment Buffer Overflow DoS

This module performs a Denial of Service Attack against Datagram TLS in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h. This occurs when a DTLS ClientHello message has multiple fragments and the fragment lengths of later fragments are larger than that of the first, a buffer overflow occurs, causing a DoS.

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Module Name



  • Juri Aedla <asd [at]>
  • Jon Hart <jon_hart [at]>




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/dos/ssl/dtls_fragment_overflow msf auxiliary(dtls_fragment_overflow) > show actions ...actions... msf auxiliary(dtls_fragment_overflow) > set ACTION <action-name> msf auxiliary(dtls_fragment_overflow) > show options and set options... msf auxiliary(dtls_fragment_overflow) > run

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