Description
A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could exploit this vulnerability by sending a crafted DNS query over IPv6, which traverses the affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to DNS over IPv6 traffic only.
CVSS breakdown
CVSS 3.0
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_appliance_software9.6 – 9.6.4.36
- Cisco / asa_5505_firmware9.4(1) – 9.4(1)
- Cisco / asa_5505_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5510_firmware9.4(1) – 9.4(1)
- Cisco / asa_5510_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5512-x_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5512-x_firmware9.4(1) – 9.4(1)
- Cisco / asa_5515-x_firmware9.4(1) – 9.4(1)
- Cisco / asa_5515-x_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5520_firmware9.4(1) – 9.4(1)
- Cisco / asa_5520_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5525-x_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5525-x_firmware9.4(1) – 9.4(1)
- Cisco / asa_5540_firmware9.4(1) – 9.4(1)
- Cisco / asa_5540_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5545-x_firmware9.4(1) – 9.4(1)
- Cisco / asa_5545-x_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5550_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5550_firmware9.4(1) – 9.4(1)
- Cisco / asa_5555-x_firmware9.4(1) – 9.4(1)
- Cisco / asa_5555-x_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5580_firmware9.4(1) – 9.4(1)
- Cisco / asa_5580_firmware96.4(0.42) – 96.4(0.42)
- Cisco / asa_5585-x_firmware9.4(1) – 9.4(1)
- Cisco / asa_5585-x_firmware96.4(0.42) – 96.4(0.42)
- Cisco / Cisco Adaptive Security Appliance (ASA) Softwaren/a – n/a
- Cisco / secure_firewall_threat_defense6.2.3 – 6.2.3.16
References
Updated 20m ago · 8 sources