Vulnerability Bulletins

Cisco IOS XE Software Layer 2 Tunneling Protocol Denial of Service Vulnerability

System information

Affected software Cisco


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.

More info:

Standar resources

Property Value
CVE CVE-2023-20227.

Version history

Version Comments Date
Ministerio de Defensa