CVE-2021-34793

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.

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL	Vendor Advisory

Configuration 1

cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*

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Published : 2021-10-27 07:15

Updated : 2021-10-29 02:12

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NVD link : CVE-2021-34793

Mitre link : CVE-2021-34793

Asa 5585-x

Cisco

CWE-924

Improper Enforcement of Message Integrity During Transmission in a Communication Channel