| Popis: |
This paper presents two novel methods for hiding data in Cisco switches as intermediate innocent devices, from the entire VTP domain. New steganographic methods affect the switches in the distribution and access layer of the three - tier hierarchical network model. They are using a combination of Switched spoofing VLAN attack (a kind of VLAN hopping), and a version of “VTP bomb” attack, to trigger the cover storage and transfer. An experimental testbed was created for a proof-of-concept and a steganographic analysis of the newly created covert channels is performed. At the end, proper countermeasures are suggested. |
