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OpenSSL < 0.9.8i DTLS ChangeCipherSpec Remote DoS

This module performs a Denial of Service Attack against Datagram TLS in OpenSSL version 0.9.8i and earlier. OpenSSL crashes under these versions when it recieves a ChangeCipherspec Datagram before a ClientHello.


Rank

  • Normal

Authors

  • Jon Oberheide < jon [at] oberheide.org >
  • TheLightCosine < thelightcosine [at] gmail.com >

References


Development


Similar Modules


Usage Information

$ msfconsole

                ##                          ###           ##    ##
 ##  ##  #### ###### ####  #####   #####    ##    ####        ######
####### ##  ##  ##  ##         ## ##  ##    ##   ##  ##   ###   ##
####### ######  ##  #####   ####  ##  ##    ##   ##  ##   ##    ##
## # ##     ##  ##  ##  ## ##      #####    ##   ##  ##   ##    ##
##   ##  #### ###   #####   #####     ##   ####   ####   #### ###
                                      ##

msf > use auxiliary/dos/ssl/dtls_changecipherspec
msf auxiliary(dtls_changecipherspec) > set RHOST [TARGET IP]
msf auxiliary(dtls_changecipherspec) > set RPORT [TARGET PORT]
msf auxiliary(dtls_changecipherspec) > run


Module Options

RHOST The target address
RPORT The target port
CHOST The local client address
CPORT The local client port
ConnectTimeout Maximum number of seconds to establish a TCP connection
GATEWAY The gateway IP address. This will be used rather than a random remote address for the UDP probe, if set.
NETMASK The local network mask. This is used to decide if an address is in the local network.
Proxies Use a proxy chain
SSL Negotiate SSL for outgoing connections
SSLVersion Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1)
UDP_SECRET The 32-bit cookie for UDP probe requests.
VERBOSE Enable detailed status messages
WORKSPACE Specify the workspace for this module
TCP::max_send_size Maxiumum tcp segment size. (0 = disable)
TCP::send_delay Delays inserted before every send. (0 = disable)