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3com switch2hub

Information

Severity

Severity

High

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

7.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Solution Type

Solution Type

Workaround

Created

Created

14 years ago

Modified

Modified

5 years ago

Summary

The remote host is subject to the switch to hub flood attack.

Insight

Insight

The remote host on the local network seems to be connected through a switch which can be turned into a hub when flooded by different mac addresses. The theory is to send a lot of packets (> 1000000) to the port of the switch we are connected to, with random mac addresses. This turns the switch into learning mode, where traffic goes everywhere.

Solution

Solution

Lock Mac addresses on each port of the remote switch or buy newer switch.