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

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: cisco

Published: 2021-10-27T00:00:00

Updated: 2021-10-27T18:56:26

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


Link: CVE-2021-34793

JSON object: View

cve-icon NVD Information

Status : Modified

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

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


Link: CVE-2021-34793

JSON object: View

cve-icon Redhat Information

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CWE