CVE-2022-20870: Cisco IOS XE Software for Catalyst Switches MPLS Denial of Service Vulnerability

Published Oct 10, 2022

Updated

A vulnerability in the egress MPLS packet processing function of Cisco IOS XE Software for Cisco Catalyst 3650, Catalyst 3850, and Catalyst 9000 Family Switches could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient input validation of IPv4 traffic. An attacker could exploit this vulnerability by sending a malformed packet out of an affected MPLS-enabled interface. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Affected Software

193 affected components

Cisco IOS XE

Cisco Catalyst 3650

Cisco Catalyst 3650-12x48fd-e

Cisco Catalyst 3650-12x48fd-l

Cisco Catalyst 3650-12x48fd-s

Cisco Catalyst 3650-12x48uq

Cisco Catalyst 3650-12x48uq-e

Cisco Catalyst 3650-12x48uq-l

Cisco Catalyst 3650-12x48uq-s

Cisco Catalyst 3650-12x48ur

Cisco Catalyst 3650-12x48ur-e

Cisco Catalyst 3650-12x48ur-l

Cisco Catalyst 3650-12x48ur-s

Cisco Catalyst 3650-12x48uz

Cisco Catalyst 3650-12x48uz-e

Cisco Catalyst 3650-12x48uz-l

Cisco Catalyst 3650-12x48uz-s

Cisco Catalyst 3650-24pd

Cisco Catalyst 3650-24pd-e

Cisco Catalyst 3650-24pd-l

Cisco Catalyst 3650-24pd-s

Cisco Catalyst 3650-24pdm

Cisco Catalyst 3650-24pdm-e

Cisco Catalyst 3650-24pdm-l

Cisco Catalyst 3650-24pdm-s

Cisco Catalyst 3650-24ps-e

Cisco Catalyst 3650-24ps-l

Cisco Catalyst 3650-24ps-s

Cisco Catalyst 3650-24td-e

Cisco Catalyst 3650-24td-l

Cisco Catalyst 3650-24td-s

Cisco Catalyst 3650-24ts-e

Cisco Catalyst 3650-24ts-l

Cisco Catalyst 3650-24ts-s

Cisco Catalyst 3650-48fd-e

Cisco Catalyst 3650-48fd-l

Cisco Catalyst 3650-48fd-s

Cisco Catalyst 3650-48fq

Cisco Catalyst 3650-48fq-e

Cisco Catalyst 3650-48fq-l

Cisco Catalyst 3650-48fq-s

Cisco Catalyst 3650-48fqm

Cisco Catalyst 3650-48fqm-e

Cisco Catalyst 3650-48fqm-l

Cisco Catalyst 3650-48fqm-s

Cisco Catalyst 3650-48fs-e

Cisco Catalyst 3650-48fs-l

Cisco Catalyst 3650-48fs-s

Cisco Catalyst 3650-48pd-e

Cisco Catalyst 3650-48pd-l

Cisco Catalyst 3650-48pd-s

Cisco Catalyst 3650-48pq-e

Cisco Catalyst 3650-48pq-l

Cisco Catalyst 3650-48pq-s

Cisco Catalyst 3650-48ps-e

Cisco Catalyst 3650-48ps-l

Cisco Catalyst 3650-48ps-s

Cisco Catalyst 3650-48td-e

Cisco Catalyst 3650-48td-l

Cisco Catalyst 3650-48td-s

Cisco Catalyst 3650-48tq-e

Cisco Catalyst 3650-48tq-l

Cisco Catalyst 3650-48tq-s

Cisco Catalyst 3650-48ts-e

Cisco Catalyst 3650-48ts-l

Cisco Catalyst 3650-48ts-s

Cisco Catalyst 3650-8x24pd-e

Cisco Catalyst 3650-8x24pd-l

Cisco Catalyst 3650-8x24pd-s

Cisco Catalyst 3650-8x24uq

Cisco Catalyst 3650-8x24uq-e

Cisco Catalyst 3650-8x24uq-l

Cisco Catalyst 3650-8x24uq-s

Cisco Catalyst 3850

Cisco Catalyst 3850-12s-e

Cisco Catalyst 3850-12s-s

Cisco Catalyst 3850-12x48u

Cisco Catalyst 3850-12xs-e

Cisco Catalyst 3850-12xs-s

Cisco Catalyst 3850-16xs-e

Cisco Catalyst 3850-16xs-s

Cisco Catalyst 3850-24p-e

Cisco Catalyst 3850-24p-l

Cisco Catalyst 3850-24p-s

Cisco Catalyst 3850-24pw-s

Cisco Catalyst 3850-24s-e

Cisco Catalyst 3850-24s-s

Cisco Catalyst 3850-24t-e

Cisco Catalyst 3850-24t-l

Cisco Catalyst 3850-24t-s

Cisco Catalyst 3850-24u

Cisco Catalyst 3850-24u-e

Cisco Catalyst 3850-24u-l

Cisco Catalyst 3850-24u-s

Cisco Catalyst 3850-24xs

Cisco Catalyst 3850-24xs-e

Cisco Catalyst 3850-24xs-s

Cisco Catalyst 3850-24xu

Cisco Catalyst 3850-24xu-e

Cisco Catalyst 3850-24xu-l

Cisco Catalyst 3850-24xu-s

Cisco Catalyst 3850-32xs-e

Cisco Catalyst 3850-32xs-s

Cisco Catalyst 3850-48f-e

Cisco Catalyst 3850-48f-l

Cisco Catalyst 3850-48f-s

Cisco Catalyst 3850-48p-e

Cisco Catalyst 3850-48p-l

Cisco Catalyst 3850-48p-s

Cisco Catalyst 3850-48pw-s

Cisco Catalyst 3850-48t-e

Cisco Catalyst 3850-48t-l

Cisco Catalyst 3850-48t-s

Cisco Catalyst 3850-48u

Cisco Catalyst 3850-48u-e

Cisco Catalyst 3850-48u-l

Cisco Catalyst 3850-48u-s

Cisco Catalyst 3850-48xs

Cisco Catalyst 3850-48xs-e

Cisco Catalyst 3850-48xs-f-e

Cisco Catalyst 3850-48xs-f-s

Cisco Catalyst 3850-48xs-s

Cisco Catalyst 3850-nm-2-40g

Cisco Catalyst 3850-nm-8-10g

Cisco Catalyst 9300

Cisco Catalyst 9300-24p-a

Cisco Catalyst 9300-24p-e

Cisco Catalyst 9300-24s-a

Cisco Catalyst 9300-24s-e

Cisco Catalyst 9300-24t-a

Cisco Catalyst 9300-24t-e

Cisco Catalyst 9300-24u-a

Cisco Catalyst 9300-24u-e

Cisco Catalyst 9300-24ux-a

Cisco Catalyst 9300-24ux-e

Cisco Catalyst 9300-48p-a

Cisco Catalyst 9300-48p-e

Cisco Catalyst 9300-48s-a

Cisco Catalyst 9300-48s-e

Cisco Catalyst 9300-48t-a

Cisco Catalyst 9300-48t-e

Cisco Catalyst 9300-48u-a

Cisco Catalyst 9300-48u-e

Cisco Catalyst 9300-48un-a

Cisco Catalyst 9300-48un-e

Cisco Catalyst 9300-48uxm-a

Cisco Catalyst 9300-48uxm-e

Cisco Catalyst 9300l

Cisco Catalyst 9300l-24p-4g-a

Cisco Catalyst 9300l-24p-4g-e

Cisco Catalyst 9300l-24p-4x-a

Cisco Catalyst 9300l-24p-4x-e

Cisco Catalyst 9300l-24t-4g-a

Cisco Catalyst 9300l-24t-4g-e

Cisco Catalyst 9300l-24t-4x-a

Cisco Catalyst 9300l-24t-4x-e

Cisco Catalyst 9300l-48p-4g-a

Cisco Catalyst 9300l-48p-4g-e

Cisco Catalyst 9300l-48p-4x-a

Cisco Catalyst 9300l-48p-4x-e

Cisco Catalyst 9300l-48t-4g-a

Cisco Catalyst 9300l-48t-4g-e

Cisco Catalyst 9300l-48t-4x-a

Cisco Catalyst 9300l-48t-4x-e

Cisco Catalyst 9300lm

Cisco Catalyst 9300x

Cisco Catalyst 9400

Cisco Catalyst 9500

Cisco Catalyst 9500h

Cisco Catalyst 9600

Cisco Catalyst C3850-12x48u-e

Cisco Catalyst C3850-12x48u-l

Cisco Catalyst C3850-12x48u-s

Cisco Catalyst C9500-12q

Cisco Catalyst C9500-12q-a

Cisco Catalyst C9500-12q-e

Cisco Catalyst C9500-16x

Cisco Catalyst C9500-16x-a

Cisco Catalyst C9500-16x-e

Cisco Catalyst C9500-24q

Cisco Catalyst C9500-24q-a

Cisco Catalyst C9500-24q-e

Cisco Catalyst C9500-24y4c

Cisco Catalyst C9500-32c

Cisco Catalyst C9500-32qc

Cisco Catalyst C9500-40x

Cisco Catalyst C9500-40x-a

Cisco Catalyst C9500-40x-e

Cisco Catalyst C9500-48y4c

Cisco Catalyst C9600-lc-24c

Cisco Catalyst C9600-lc-48s

Cisco Catalyst C9600-lc-48tx

Cisco Catalyst C9600-lc-48yl

Event History

Oct 10, 2022

CVE Published

via MITRE·08:43 PM

Data Sourced

via MITRE·08:43 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is CVE-2022-20870?

CVE-2022-20870 is a vulnerability in the egress MPLS packet processing function of Cisco IOS XE Software for Cisco Catalyst switches.

How severe is CVE-2022-20870?

CVE-2022-20870 has a severity value of 8.6, categorized as high severity.

Which devices are affected by CVE-2022-20870?

Cisco Catalyst 3650, Catalyst 3850, and Catalyst 9000 Family Switches are affected by CVE-2022-20870.

How can CVE-2022-20870 be exploited?

An unauthenticated, remote attacker could exploit CVE-2022-20870 to cause a denial of service by making an affected device reload unexpectedly.

CVE-2022-20870: Cisco IOS XE Software for Catalyst Switches MPLS Denial of Service Vulnerability

Affected Software

Event History

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Frequently Asked Questions

What is CVE-2022-20870?

How severe is CVE-2022-20870?

Which devices are affected by CVE-2022-20870?

How can CVE-2022-20870 be exploited?

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