CVE-2022-20915 HIGH

CVE-2022-20915: Cisco IOS XE Software IPv6 VPN over MPLS Denial of Service Vulnerability

Vendor Cisco
Product Cisco IOS XE Software
Weakness CWE-115
Published October 10, 2022
Last update November 1, 2024
View on NVD All CVEs

CVSS base score

7.4/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A vulnerability in the implementation of IPv6 VPN over MPLS (6VPE) with Zone-Based Firewall (ZBFW) of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling of an IPv6 packet that is forwarded from an MPLS and ZBFW-enabled interface in a 6VPE deployment. An attacker could exploit this vulnerability by sending a crafted IPv6 packet sourced from a device on the IPv6-enabled virtual routing and forwarding (VRF) interface through the affected device. A successful exploit could allow the attacker to reload the device, resulting in a DoS condition.

Key dates

02Disclosure timeline

October 10, 2022 CVE published
November 1, 2024 Record updated