Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Cisco / adaptive_security_appliance9.8.4.40
- Cisco / adaptive_security_appliance_software9.9.0 – 9.12.4.29
- Cisco / asa_5505_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5512-x_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5515-x_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5525-x_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5545-x_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5555-x_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5580_firmware009.008(004.025) – 009.008(004.025)
- Cisco / asa_5585-x_firmware009.008(004.025) – 009.008(004.025)
- Cisco / Cisco Adaptive Security Appliance (ASA) Softwaren/a – n/a
- Cisco / secure_firewall_threat_defense6.4.0.13
References
Updated 12m ago · 8 sources