module

SMBLoris NBSS Denial of Service

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Disclosed
2017-06-29
Created
2018-05-30

Description

The SMBLoris attack consumes large chunks of memory in the target by sending
SMB requests with the NetBios Session Service(NBSS) Length Header value set
to the maximum possible value. By keeping these connections open and initiating
large numbers of these sessions, the memory does not get freed, and the server
grinds to a halt. This vulnerability was originally disclosed by Sean Dillon
and Zach Harding.

DISCLAIMER: This module opens a lot of simultaneous connections. Please check
your system's ULIMIT to make sure it can handle it. This module will also run
continuously until stopped.

Authors

thelightcosine
Adam Cammack adam_cammack@rapid7.com

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