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Cisco Bug: CSCun45520 - Cisco ASA DHCPv6 Denial of Service Vulnerability

Last Modified

Apr 16, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

9.1(4)

Description (partial)

Symptom:
ASA crash in Thread Name: DHCPv6 Relay when processing a DHCPv6 packet

Conditions:
DHCPv6 relay should be enabled. To verify if this feature is enabled use the show run ipv6 dhcprelay and verify that it is enabled at least on
one interface

ipv6 dhcprelay enable <if name> 

DHCPv4 relay is not affected by this issue.
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