The problem has been fixed in version 1.5.8 Cisco SSH Cisco SSH does not appear to be vulnerable. Contact your SSH vendor for a fix if source code is not available. This is the patch for ssh-1.2.31 package. Most SSH distributions incorporated the file deattack.c released by CORE SDI in 1998. The detection is done using a hash table that is dynamically allocated based on the size of the received packet.
Most modern systems implement the later behaviour and are thus vulnerable.
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