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CVE-2023-20227

HIGH CVSS: 8.6 Published: 2023-09-27 Modified: 2026-06-17

Description

A vulnerability in the Layer 2 Tunneling Protocol (L2TP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain L2TP packets. An attacker could exploit this vulnerability by sending crafted L2TP packets to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. Note: Only traffic directed to the affected system can be used to exploit this vulnerability.

Affected Platforms

Cisco 4321\/K9-Ws Integrated Services RouterCisco Catalyst 8300-2N2S-6TCisco 1100-4Gltena Integrated Services RouterCisco 4331\/K9 Integrated Services RouterCisco 4321\/K9 Integrated Services RouterCisco 4351\/K9 Integrated Services RouterCisco C8200-1N-4TCisco 1100-6G Integrated Services RouterCisco Catalyst 8300-1N1S-4T2XCisco 4431 Integrated Services Router

Weakness Type

CWE-388, NVD-CWE-noinfo

References