A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2021-10-27T18:56:26.248036Z

Updated: 2024-09-17T01:10:35.509Z

Reserved: 2021-06-15T00:00:00

Link: CVE-2021-34793

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-10-27T19:15:08.563

Modified: 2023-11-07T03:36:26.283

Link: CVE-2021-34793

cve-icon Redhat

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