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Cisco Bug: CSCum91247 - ARP Cache storm locks up switch - power cycle required to recover

Last Modified

Aug 06, 2018

Products (1)

  • Cisco Catalyst 3750-E Series Switches

Known Affected Releases

15.2(1)T1.11 15.2(2)TST

Description (partial)

Symptoms:
A vulnerability in ARP module of Cisco switches could allow an unauthenticated, adjacent attacker to overfill switch's ARP table and cause high CPU 
utilization.

The vulnerability is due to ip device tracking setting configured by default on a device. An attacker could exploit this vulnerability by sending a large 
number of ARP packets to an affected device.

Conditions:
Large number of differing ARP requests processed by the switch.
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Bug Details Include

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  • Status
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  • Known Fixed Releases
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