Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities

Overview

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine.

This vulnerability is due to improper handling of nested GRE traffic. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. A successful exploit could allow the attacker to trigger an unexpected reload of the Snort 3 Detection Engine, resulting in either a bypass or denial of service (DoS) condition, depending on device configuration. For more information, see the section of this advisory. The Snort 3 Detection Engine will restart automatically. No manual intervention is required.

Affected

• cyber_vision 3.0.0
• cyber_vision 3.0.2
• cyber_vision 3.0.3
• cyber_vision 3.0.1
• cyber_vision 3.1.0
• cyber_vision 3.0.4
• cyber_vision 3.1.1
• cyber_vision 3.1.2
• cyber_vision 3.2.0
• cyber_vision 3.0.5
• cyber_vision 3.2.1
• cyber_vision 3.0.6
• cyber_vision 3.2.2
• cyber_vision 3.2.3
• cyber_vision 3.2.4
• cyber_vision 4.0.0
• cyber_vision 4.0.1
• cyber_vision 4.0.2
• cyber_vision 4.0.3
• cyber_vision 4.1.0
• cyber_vision 4.1.1
• cyber_vision 4.1.2
• cyber_vision 4.1.3
• cyber_vision 4.1.4
• cyber_vision 4.2.0
• cyber_vision 4.2.1
• cyber_vision 4.1.5
• cyber_vision 4.2.2
• cyber_vision 4.2.X
• cyber_vision 4.2.3
• cyber_vision 4.2.4
• cyber_vision 4.2.6
• cyber_vision 4.1.6
• cyber_vision 4.3.0
• cyber_vision 4.3.1
• cyber_vision 4.3.2
• cyber_vision 4.3.3
• cyber_vision 4.4.0
• cyber_vision 4.4.1
• cyber_vision 4.4.2
• cyber_vision 4.4.3
• cyber_vision 4.1.7
• cyber_vision 5.0.0
• cyber_vision 5.0.1
• cyber_vision 5.0.2
• cyber_vision 5.1.0
• cyber_vision 5.1.1
• cyber_vision 5.1.2
• cyber_vision 5.1.3
• cyber_vision 5.2.0

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.