A vulnerability in the TCP/IP traffic handling function of the Snort Detection Engine of Cisco Firepower Threat Defense (FTD) Software and Cisco FirePOWER Services could allow an unauthenticated, remote attacker to cause legitimate network traffic to be dropped, resulting in a denial of service (DoS) condition.
This vulnerability is due to the improper handling of TCP/IP network traffic. An attacker could exploit this vulnerability by sending a large amount of TCP/IP network traffic through the affected device. A successful exploit could allow the attacker to cause the Cisco FTD device to drop network traffic, resulting in a DoS condition. The affected device must be rebooted to resolve the DoS condition.
The product does not properly control the allocation and maintenance of a limited resource.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firepower_threat_defense_software | Cisco | 6.2.3 (including) | 6.2.3 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.1 (including) | 6.2.3.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.2 (including) | 6.2.3.2 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.3 (including) | 6.2.3.3 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.4 (including) | 6.2.3.4 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.5 (including) | 6.2.3.5 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.6 (including) | 6.2.3.6 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.7 (including) | 6.2.3.7 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.8 (including) | 6.2.3.8 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.9 (including) | 6.2.3.9 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.10 (including) | 6.2.3.10 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.11 (including) | 6.2.3.11 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.12 (including) | 6.2.3.12 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.13 (including) | 6.2.3.13 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.14 (including) | 6.2.3.14 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.15 (including) | 6.2.3.15 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.16 (including) | 6.2.3.16 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.17 (including) | 6.2.3.17 (including) |
| Firepower_threat_defense_software | Cisco | 6.2.3.18 (including) | 6.2.3.18 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0 (including) | 6.4.0 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.1 (including) | 6.4.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.2 (including) | 6.4.0.2 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.3 (including) | 6.4.0.3 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.4 (including) | 6.4.0.4 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.5 (including) | 6.4.0.5 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.6 (including) | 6.4.0.6 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.7 (including) | 6.4.0.7 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.8 (including) | 6.4.0.8 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.9 (including) | 6.4.0.9 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.10 (including) | 6.4.0.10 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.11 (including) | 6.4.0.11 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.12 (including) | 6.4.0.12 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.13 (including) | 6.4.0.13 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.14 (including) | 6.4.0.14 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.15 (including) | 6.4.0.15 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.16 (including) | 6.4.0.16 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.17 (including) | 6.4.0.17 (including) |
| Firepower_threat_defense_software | Cisco | 6.4.0.18 (including) | 6.4.0.18 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.0 (including) | 6.6.0 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.0.1 (including) | 6.6.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.1 (including) | 6.6.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.3 (including) | 6.6.3 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.4 (including) | 6.6.4 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.5 (including) | 6.6.5 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.5.1 (including) | 6.6.5.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.5.2 (including) | 6.6.5.2 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.7 (including) | 6.6.7 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.7.1 (including) | 6.6.7.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.6.7.2 (including) | 6.6.7.2 (including) |
| Firepower_threat_defense_software | Cisco | 6.7.0 (including) | 6.7.0 (including) |
| Firepower_threat_defense_software | Cisco | 6.7.0.1 (including) | 6.7.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 6.7.0.2 (including) | 6.7.0.2 (including) |
| Firepower_threat_defense_software | Cisco | 6.7.0.3 (including) | 6.7.0.3 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.0 (including) | 7.0.0 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.0.1 (including) | 7.0.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.1 (including) | 7.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.1.1 (including) | 7.0.1.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.2 (including) | 7.0.2 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.2.1 (including) | 7.0.2.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.3 (including) | 7.0.3 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.4 (including) | 7.0.4 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.5 (including) | 7.0.5 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.6 (including) | 7.0.6 (including) |
| Firepower_threat_defense_software | Cisco | 7.0.6.1 (including) | 7.0.6.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.1.0 (including) | 7.1.0 (including) |
| Firepower_threat_defense_software | Cisco | 7.1.0.1 (including) | 7.1.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.1.0.2 (including) | 7.1.0.2 (including) |
| Firepower_threat_defense_software | Cisco | 7.1.0.3 (including) | 7.1.0.3 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.0 (including) | 7.2.0 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.0.1 (including) | 7.2.0.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.1 (including) | 7.2.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.2 (including) | 7.2.2 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.3 (including) | 7.2.3 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.4 (including) | 7.2.4 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.4.1 (including) | 7.2.4.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.5 (including) | 7.2.5 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.5.1 (including) | 7.2.5.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.2.5.2 (including) | 7.2.5.2 (including) |
| Firepower_threat_defense_software | Cisco | 7.3.0 (including) | 7.3.0 (including) |
| Firepower_threat_defense_software | Cisco | 7.3.1 (including) | 7.3.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.3.1.1 (including) | 7.3.1.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.3.1.2 (including) | 7.3.1.2 (including) |
| Firepower_threat_defense_software | Cisco | 7.4.0 (including) | 7.4.0 (including) |
| Firepower_threat_defense_software | Cisco | 7.4.1 (including) | 7.4.1 (including) |
| Firepower_threat_defense_software | Cisco | 7.4.1.1 (including) | 7.4.1.1 (including) |
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.