CVE-2022-20678 HIGH

CVE-2022-20678: Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability

Vendor Cisco
Product Cisco IOS XE Software
Weakness CWE-413
Published April 15, 2022
Last update November 6, 2024

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

A vulnerability in the AppNav-XE feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of certain TCP segments. An attacker could exploit this vulnerability by sending a stream of crafted TCP traffic at a high rate through an interface of an affected device. That interface would need to have AppNav interception enabled. A successful exploit could allow the attacker to cause the device to reload.

Key dates

02Disclosure timeline

April 15, 2022 CVE published
November 6, 2024 Record updated