Vulnerabilities > CVE-2021-34793 - Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Cisco products

CVSS 8.6 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

NONE

Availability impact

HIGH

network

low complexity

cisco

CWE-924

NVD

Published: 2021-10-27

Updated: 2023-11-07

Summary

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.

Vulnerable Configurations

Part	Description	Count
Application	Cisco Cisco Firepower Threat Defense 6.7.0 Cisco Firepower Threat Defense 6.7.0.1 Cisco Firepower Threat Defense 6.7.0.2 Cisco Firepower Threat Defense 6.7.0.3 Cisco Firepower Threat Defense 6.5.0 Cisco Firepower Threat Defense 6.5.0.1 Cisco Firepower Threat Defense 6.5.0.2 Cisco Firepower Threat Defense 6.5.0.3 Cisco Firepower Threat Defense 6.5.0.4 Cisco Firepower Threat Defense 6.5.0.5 Cisco Firepower Threat Defense 6.6.0 Cisco Firepower Threat Defense 6.6.0.1 Cisco Firepower Threat Defense 6.6.1 Cisco Firepower Threat Defense 6.6.3 Cisco Firepower Threat Defense 6.6.4 Cisco Firepower Threat Defense - Cisco Firepower Threat Defense 5.3.0 Cisco Firepower Threat Defense 5.4.0 Cisco Firepower Threat Defense 6.0 Cisco Firepower Threat Defense 6.0.0 Cisco Firepower Threat Defense 6.0.0.1 Cisco Firepower Threat Defense 6.0.1 Cisco Firepower Threat Defense 6.0.1.1 Cisco Firepower Threat Defense 6.0.1.2 Cisco Firepower Threat Defense 6.0.1.3 Cisco Firepower Threat Defense 6.0.1.4 Cisco Firepower Threat Defense 6.1.0 Cisco Firepower Threat Defense 6.1.0.1 Cisco Firepower Threat Defense 6.1.0.2 Cisco Firepower Threat Defense 6.1.0.3 Cisco Firepower Threat Defense 6.1.0.4 Cisco Firepower Threat Defense 6.1.0.5 Cisco Firepower Threat Defense 6.1.0.6 Cisco Firepower Threat Defense 6.1.0.7 Cisco Firepower Threat Defense 6.2.0 Cisco Firepower Threat Defense 6.2.0.1 Cisco Firepower Threat Defense 6.2.0.2 Cisco Firepower Threat Defense 6.2.0.3 Cisco Firepower Threat Defense 6.2.0.4 Cisco Firepower Threat Defense 6.2.0.5 Cisco Firepower Threat Defense 6.2.0.6 Cisco Firepower Threat Defense 6.2.1 Cisco Firepower Threat Defense 6.2.2 Cisco Firepower Threat Defense 6.2.2.1 Cisco Firepower Threat Defense 6.2.2.2 Cisco Firepower Threat Defense 6.2.2.3 Cisco Firepower Threat Defense 6.2.2.4 Cisco Firepower Threat Defense 6.2.2.5 Cisco Firepower Threat Defense 6.2.3 Cisco Firepower Threat Defense 6.2.3.0 Cisco Firepower Threat Defense 6.2.3.1 Cisco Firepower Threat Defense 6.2.3.2 Cisco Firepower Threat Defense 6.2.3.3 Cisco Firepower Threat Defense 6.2.3.4 Cisco Firepower Threat Defense 6.2.3.5 Cisco Firepower Threat Defense 6.2.3.6 Cisco Firepower Threat Defense 6.2.3.7 Cisco Firepower Threat Defense 6.2.3.8 Cisco Firepower Threat Defense 6.2.3.9 Cisco Firepower Threat Defense 6.2.3.10 Cisco Firepower Threat Defense 6.2.3.11 Cisco Firepower Threat Defense 6.2.3.12 Cisco Firepower Threat Defense 6.2.3.13 Cisco Firepower Threat Defense 6.2.3.14 Cisco Firepower Threat Defense 6.2.3.15 Cisco Firepower Threat Defense 6.2.3.16 Cisco Firepower Threat Defense 6.2.3.17 Cisco Firepower Threat Defense 6.2.3.18 Cisco Firepower Threat Defense 6.3.0 Cisco Firepower Threat Defense 6.3.0.1 Cisco Firepower Threat Defense 6.3.0.2 Cisco Firepower Threat Defense 6.3.0.3 Cisco Firepower Threat Defense 6.3.0.4 Cisco Firepower Threat Defense 6.3.0.5 Cisco Firepower Threat Defense 6.3.0.6 Cisco Firepower Threat Defense 6.4.0 Cisco Firepower Threat Defense 6.4.0.1 Cisco Firepower Threat Defense 6.4.0.2 Cisco Firepower Threat Defense 6.4.0.3 Cisco Firepower Threat Defense 6.4.0.4 Cisco Firepower Threat Defense 6.4.0.5 Cisco Firepower Threat Defense 6.4.0.6 Cisco Firepower Threat Defense 6.4.0.7 Cisco Firepower Threat Defense 6.4.0.8 Cisco Firepower Threat Defense 6.4.0.9 Cisco Firepower Threat Defense 6.4.0.10 Cisco Firepower Threat Defense 6.4.0.11 Cisco Firepower Threat Defense 6.4.0.12 Cisco Adaptive Security Appliance 9.1.7.4 Cisco Adaptive Security Appliance 9.2 Cisco Adaptive Security Appliance 9.2.4.8 Cisco Adaptive Security Appliance 9.3 Cisco Adaptive Security Appliance 9.3.3.9 Cisco Adaptive Security Appliance 9.4 Cisco Adaptive Security Appliance 9.4.2.11 Cisco Adaptive Security Appliance 9.4.4.37 Cisco Adaptive Security Appliance 9.5 Cisco Adaptive Security Appliance 9.5.2.5 Cisco Adaptive Security Appliance 9.6 Cisco Adaptive Security Appliance 9.6.0 Cisco Adaptive Security Appliance 9.6.1 Cisco Adaptive Security Appliance 9.6.1.3 Cisco Adaptive Security Appliance 9.6.1.5 Cisco Adaptive Security Appliance 9.6.1.10 Cisco Adaptive Security Appliance 9.6.2 Cisco Adaptive Security Appliance 9.6.2.1 Cisco Adaptive Security Appliance 9.6.2.2 Cisco Adaptive Security Appliance 9.6.2.3 Cisco Adaptive Security Appliance 9.6.2.7 Cisco Adaptive Security Appliance 9.6.2.11 Cisco Adaptive Security Appliance 9.6.2.13 Cisco Adaptive Security Appliance 9.6.2.22 Cisco Adaptive Security Appliance 9.6.2.23 Cisco Adaptive Security Appliance 9.6.3 Cisco Adaptive Security Appliance 9.6.3.1 Cisco Adaptive Security Appliance 9.6.3.3 Cisco Adaptive Security Appliance 9.6.3.8 Cisco Adaptive Security Appliance 9.6.3.9 Cisco Adaptive Security Appliance 9.6.3.11 Cisco Adaptive Security Appliance 9.6.3.12 Cisco Adaptive Security Appliance 9.6.3.14 Cisco Adaptive Security Appliance 9.6.3.17 Cisco Adaptive Security Appliance 9.6.3.20 Cisco Adaptive Security Appliance 9.6.4 Cisco Adaptive Security Appliance 9.6.4.3 Cisco Adaptive Security Appliance 9.6.4.5 Cisco Adaptive Security Appliance 9.6.4.6 Cisco Adaptive Security Appliance 9.6.4.8 Cisco Adaptive Security Appliance 9.6.4.10 Cisco Adaptive Security Appliance 9.6.4.12 Cisco Adaptive Security Appliance 9.6.4.14 Cisco Adaptive Security Appliance 9.6.4.17 Cisco Adaptive Security Appliance 9.6.4.18 Cisco Adaptive Security Appliance 9.6.4.20 Cisco Adaptive Security Appliance 9.6.4.22 Cisco Adaptive Security Appliance 9.6.4.23 Cisco Adaptive Security Appliance 9.6.4.24 Cisco Adaptive Security Appliance 9.6.4.25 Cisco Adaptive Security Appliance 9.6.4.29 Cisco Adaptive Security Appliance 9.6.4.30 Cisco Adaptive Security Appliance 9.6.4.31 Cisco Adaptive Security Appliance 9.6.4.34 Cisco Adaptive Security Appliance 9.6.4.35 Cisco Adaptive Security Appliance 9.6.4.36 Cisco Adaptive Security Appliance 9.6.4.40 Cisco Adaptive Security Appliance 9.6.4.41 Cisco Adaptive Security Appliance 9.6.4.42 Cisco Adaptive Security Appliance 9.6.4.43 Cisco Adaptive Security Appliance 9.6.4.45 Cisco Adaptive Security Appliance 9.7 Cisco Adaptive Security Appliance 9.7.1 Cisco Adaptive Security Appliance 9.7.1.2 Cisco Adaptive Security Appliance 9.7.1.4 Cisco Adaptive Security Appliance 9.7.1.8 Cisco Adaptive Security Appliance 9.7.1.15 Cisco Adaptive Security Appliance 9.7.1.16 Cisco Adaptive Security Appliance 9.7.1.21 Cisco Adaptive Security Appliance 9.7.1.24 Cisco Adaptive Security Appliance 9.8 Cisco Adaptive Security Appliance 9.8.0 Cisco Adaptive Security Appliance 9.8.1 Cisco Adaptive Security Appliance 9.8.1.5 Cisco Adaptive Security Appliance 9.8.1.7 Cisco Adaptive Security Appliance 9.8.2 Cisco Adaptive Security Appliance 9.8.2.8 Cisco Adaptive Security Appliance 9.8.2.14 Cisco Adaptive Security Appliance 9.8.2.15 Cisco Adaptive Security Appliance 9.8.2.17 Cisco Adaptive Security Appliance 9.8.2.20 Cisco Adaptive Security Appliance 9.8.2.24 Cisco Adaptive Security Appliance 9.8.2.26 Cisco Adaptive Security Appliance 9.8.2.28 Cisco Adaptive Security Appliance 9.8.2.33 Cisco Adaptive Security Appliance 9.8.2.35 Cisco Adaptive Security Appliance 9.8.2.38 Cisco Adaptive Security Appliance 9.8.2.45 Cisco Adaptive Security Appliance 9.8.3 Cisco Adaptive Security Appliance 9.8.3.8 Cisco Adaptive Security Appliance 9.8.3.11 Cisco Adaptive Security Appliance 9.8.3.14 Cisco Adaptive Security Appliance 9.8.3.16 Cisco Adaptive Security Appliance 9.8.3.18 Cisco Adaptive Security Appliance 9.8.3.21 Cisco Adaptive Security Appliance 9.8.3.26 Cisco Adaptive Security Appliance 9.8.3.29 Cisco Adaptive Security Appliance 9.8.4 Cisco Adaptive Security Appliance 9.8.4.3 Cisco Adaptive Security Appliance 9.8.4.7 Cisco Adaptive Security Appliance 9.8.4.8 Cisco Adaptive Security Appliance 9.8.4.9 Cisco Adaptive Security Appliance 9.8.4.10 Cisco Adaptive Security Appliance 9.8.4.12 Cisco Adaptive Security Appliance 9.8.4.15 Cisco Adaptive Security Appliance 9.8.4.17 Cisco Adaptive Security Appliance 9.8.4.20 Cisco Adaptive Security Appliance 9.8.4.22 Cisco Adaptive Security Appliance 9.8.4.24 Cisco Adaptive Security Appliance 9.8.4.25 Cisco Adaptive Security Appliance 9.8.4.26 Cisco Adaptive Security Appliance 9.8.4.29 Cisco Adaptive Security Appliance 9.8.4.32 Cisco Adaptive Security Appliance 9.8.4.33 Cisco Adaptive Security Appliance 9.8.4.34 Cisco Adaptive Security Appliance 9.8.4.35 Cisco Adaptive Security Appliance 9.8.4.39	205
OS	Cisco Cisco Adaptive Security Appliance Software 9.9.0 Cisco Adaptive Security Appliance Software 9.9.0.0 Cisco Adaptive Security Appliance Software 9.9.1 Cisco Adaptive Security Appliance Software 9.9.1\(1\) Cisco Adaptive Security Appliance Software 9.9.1.2 Cisco Adaptive Security Appliance Software 9.9.1.3 Cisco Adaptive Security Appliance Software 9.9.1.4 Cisco Adaptive Security Appliance Software 9.9.1.5 Cisco Adaptive Security Appliance Software 9.9.2 Cisco Adaptive Security Appliance Software 9.9.2.1 Cisco Adaptive Security Appliance Software 9.9.2.9 Cisco Adaptive Security Appliance Software 9.9.2.14 Cisco Adaptive Security Appliance Software 9.9.2.18 Cisco Adaptive Security Appliance Software 9.9.2.25 Cisco Adaptive Security Appliance Software 9.9.2.27 Cisco Adaptive Security Appliance Software 9.9.2.32 Cisco Adaptive Security Appliance Software 9.9.2.36 Cisco Adaptive Security Appliance Software 9.9.2.40 Cisco Adaptive Security Appliance Software 9.9.2.47 Cisco Adaptive Security Appliance Software 9.9.2.50 Cisco Adaptive Security Appliance Software 9.9.2.52 Cisco Adaptive Security Appliance Software 9.9.2.56 Cisco Adaptive Security Appliance Software 9.9.2.59 Cisco Adaptive Security Appliance Software 9.9.2.61 Cisco Adaptive Security Appliance Software 9.9.2.66 Cisco Adaptive Security Appliance Software 9.9.2.67 Cisco Adaptive Security Appliance Software 9.9.2.74 Cisco Adaptive Security Appliance Software 9.9.2.80 Cisco Adaptive Security Appliance Software 9.9.2.83 Cisco Adaptive Security Appliance Software 9.9.2.85 Cisco Adaptive Security Appliance Software 9.9.2.235 Cisco Adaptive Security Appliance Software 9.10 Cisco Adaptive Security Appliance Software 9.10.0 Cisco Adaptive Security Appliance Software 9.10.1 Cisco Adaptive Security Appliance Software 9.10.1.2 Cisco Adaptive Security Appliance Software 9.10.1.7 Cisco Adaptive Security Appliance Software 9.10.1.10 Cisco Adaptive Security Appliance Software 9.10.1.11 Cisco Adaptive Security Appliance Software 9.10.1.17 Cisco Adaptive Security Appliance Software 9.10.1.22 Cisco Adaptive Security Appliance Software 9.10.1.27 Cisco Adaptive Security Appliance Software 9.10.1.30 Cisco Adaptive Security Appliance Software 9.10.1.32 Cisco Adaptive Security Appliance Software 9.10.1.37 Cisco Adaptive Security Appliance Software 9.10.1.40 Cisco Adaptive Security Appliance Software 9.10.1.42 Cisco Adaptive Security Appliance Software 9.10.1.43 Cisco Adaptive Security Appliance Software 9.10.1.44 Cisco Adaptive Security Appliance Software 9.11 Cisco Adaptive Security Appliance Software 9.12 Cisco Adaptive Security Appliance Software 9.12.0 Cisco Adaptive Security Appliance Software 9.12.1 Cisco Adaptive Security Appliance Software 9.12.1.2 Cisco Adaptive Security Appliance Software 9.12.1.3 Cisco Adaptive Security Appliance Software 9.12.2 Cisco Adaptive Security Appliance Software 9.12.2.1 Cisco Adaptive Security Appliance Software 9.12.2.4 Cisco Adaptive Security Appliance Software 9.12.2.5 Cisco Adaptive Security Appliance Software 9.12.2.9 Cisco Adaptive Security Appliance Software 9.12.3 Cisco Adaptive Security Appliance Software 9.12.3.2 Cisco Adaptive Security Appliance Software 9.12.3.6 Cisco Adaptive Security Appliance Software 9.12.3.7 Cisco Adaptive Security Appliance Software 9.12.3.9 Cisco Adaptive Security Appliance Software 9.12.3.12 Cisco Adaptive Security Appliance Software 9.12.4 Cisco Adaptive Security Appliance Software 9.12.4.2 Cisco Adaptive Security Appliance Software 9.12.4.3 Cisco Adaptive Security Appliance Software 9.12.4.4 Cisco Adaptive Security Appliance Software 9.12.4.7 Cisco Adaptive Security Appliance Software 9.12.4.8 Cisco Adaptive Security Appliance Software 9.12.4.10 Cisco Adaptive Security Appliance Software 9.12.4.13 Cisco Adaptive Security Appliance Software 9.12.4.18 Cisco Adaptive Security Appliance Software 9.12.4.24 Cisco Adaptive Security Appliance Software 9.12.4.25 Cisco Adaptive Security Appliance Software 9.12.4.26 Cisco Adaptive Security Appliance Software 9.15.1 Cisco Adaptive Security Appliance Software 9.15.1.1 Cisco Adaptive Security Appliance Software 9.15.1.4 Cisco Adaptive Security Appliance Software 9.15.1.7 Cisco Adaptive Security Appliance Software 9.15.1.10 Cisco Adaptive Security Appliance Software 9.15.1.15 Cisco Adaptive Security Appliance Software 9.15.1.16 Cisco Adaptive Security Appliance Software 9.16.1 Cisco Adaptive Security Appliance Software 9.16.1.28 Cisco Adaptive Security Appliance Software 9.16.2 Cisco Adaptive Security Appliance Software 9.13.1 Cisco Adaptive Security Appliance Software 9.13.1.2 Cisco Adaptive Security Appliance Software 9.13.1.4 Cisco Adaptive Security Appliance Software 9.13.1.5 Cisco Adaptive Security Appliance Software 9.13.1.7 Cisco Adaptive Security Appliance Software 9.13.1.10 Cisco Adaptive Security Appliance Software 9.13.1.12 Cisco Adaptive Security Appliance Software 9.13.1.13 Cisco Adaptive Security Appliance Software 9.13.1.16 Cisco Adaptive Security Appliance Software 9.13.1.19 Cisco Adaptive Security Appliance Software 9.13.1.21 Cisco Adaptive Security Appliance Software 9.14 Cisco Adaptive Security Appliance Software 9.14.1 Cisco Adaptive Security Appliance Software 9.14.1.6 Cisco Adaptive Security Appliance Software 9.14.1.10 Cisco Adaptive Security Appliance Software 9.14.1.15 Cisco Adaptive Security Appliance Software 9.14.1.19 Cisco Adaptive Security Appliance Software 9.14.1.29 Cisco Adaptive Security Appliance Software 9.14.1.30 Cisco Adaptive Security Appliance Software 9.14.2 Cisco Adaptive Security Appliance Software 9.14.2.4 Cisco Adaptive Security Appliance Software 9.14.2.7 Cisco Adaptive Security Appliance Software 9.14.2.8 Cisco Adaptive Security Appliance Software 9.14.2.13 Cisco Adaptive Security Appliance Software 9.14.2.15 Cisco Adaptive Security Appliance Software 9.14.3 Cisco Adaptive Security Appliance Software 9.14.3.1 Cisco ASA 5512 X Firmware 009.008\(004.025\) Cisco ASA 5505 Firmware 009.008\(004.025\) Cisco ASA 5515 X Firmware 009.008\(004.025\) Cisco ASA 5525 X Firmware 009.008\(004.025\) Cisco ASA 5545 X Firmware 009.008\(004.025\) Cisco ASA 5555 X Firmware 009.008\(004.025\) Cisco ASA 5580 Firmware 009.008\(004.025\) Cisco ASA 5585 X Firmware 009.008\(004.025\)	122
Hardware	Cisco Cisco ASA 5512 X - Cisco ASA 5505 - Cisco ASA 5515 X - Cisco ASA 5525 X - Cisco ASA 5545 X - Cisco ASA 5555 X - Cisco ASA 5580 - Cisco ASA 5585 X -	8

Common Weakness Enumeration (CWE)

CWE-924 - Improper Enforcement of Message Integrity During Transmission in a Communication Channel

References

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