CVE-2022-20870 : A vulnerability in the egress MPLS packet processing function of Cisco IOS XE So

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.

Published 2022-10-10 21:15:10

Updated 2022-10-13 20:00:15

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2022-20870

Cisco » Ios Xe » Version: N/A
cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 3650 » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48fd-e » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48fd-l » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48fd-s » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uq » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uq-e » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uq-l » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uq-s » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48ur » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48ur-e » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48ur-l » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48ur-s » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uz » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uz-e » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uz-l » Version: N/A
When used together with: Cisco » Catalyst 3650-12x48uz-s » Version: N/A
When used together with: Cisco » Catalyst 3650-24pd » Version: N/A
When used together with: Cisco » Catalyst 3650-24pd-e » Version: N/A
When used together with: Cisco » Catalyst 3650-24pd-l » Version: N/A
When used together with: Cisco » Catalyst 3650-24pd-s » Version: N/A
When used together with: Cisco » Catalyst 3650-24pdm » Version: N/A
When used together with: Cisco » Catalyst 3650-24pdm-e » Version: N/A
When used together with: Cisco » Catalyst 3650-24pdm-l » Version: N/A
When used together with: Cisco » Catalyst 3650-24pdm-s » Version: N/A
When used together with: Cisco » Catalyst 3650-24ps-e » Version: N/A
When used together with: Cisco » Catalyst 3650-24ps-l » Version: N/A
When used together with: Cisco » Catalyst 3650-24ps-s » Version: N/A
When used together with: Cisco » Catalyst 3650-24td-e » Version: N/A
When used together with: Cisco » Catalyst 3650-24td-l » Version: N/A
When used together with: Cisco » Catalyst 3650-24td-s » Version: N/A
When used together with: Cisco » Catalyst 3650-24ts-e » Version: N/A
When used together with: Cisco » Catalyst 3650-24ts-l » Version: N/A
When used together with: Cisco » Catalyst 3650-24ts-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48fd-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48fd-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48fd-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48fq » Version: N/A
When used together with: Cisco » Catalyst 3650-48fq-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48fq-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48fq-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48fqm » Version: N/A
When used together with: Cisco » Catalyst 3650-48fqm-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48fqm-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48fqm-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48fs-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48fs-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48fs-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48pd-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48pd-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48pd-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48pq-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48pq-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48pq-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48ps-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48ps-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48ps-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48td-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48td-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48td-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48tq-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48tq-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48tq-s » Version: N/A
When used together with: Cisco » Catalyst 3650-48ts-e » Version: N/A
When used together with: Cisco » Catalyst 3650-48ts-l » Version: N/A
When used together with: Cisco » Catalyst 3650-48ts-s » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24pd-e » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24pd-l » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24pd-s » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24uq » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24uq-e » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24uq-l » Version: N/A
When used together with: Cisco » Catalyst 3650-8x24uq-s » Version: N/A
When used together with: Cisco » Catalyst 3850 » Version: N/A
When used together with: Cisco » Catalyst 3850-12s-e » Version: N/A
When used together with: Cisco » Catalyst 3850-12s-s » Version: N/A
When used together with: Cisco » Catalyst 3850-12x48u » Version: N/A
When used together with: Cisco » Catalyst 3850-12xs-e » Version: N/A
When used together with: Cisco » Catalyst 3850-12xs-s » Version: N/A
When used together with: Cisco » Catalyst 3850-16xs-e » Version: N/A
When used together with: Cisco » Catalyst 3850-16xs-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24p-e » Version: N/A
When used together with: Cisco » Catalyst 3850-24p-l » Version: N/A
When used together with: Cisco » Catalyst 3850-24p-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24pw-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24s-e » Version: N/A
When used together with: Cisco » Catalyst 3850-24s-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24t-e » Version: N/A
When used together with: Cisco » Catalyst 3850-24t-l » Version: N/A
When used together with: Cisco » Catalyst 3850-24t-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24u » Version: N/A
When used together with: Cisco » Catalyst 3850-24u-e » Version: N/A
When used together with: Cisco » Catalyst 3850-24u-l » Version: N/A
When used together with: Cisco » Catalyst 3850-24u-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24xs » Version: N/A
When used together with: Cisco » Catalyst 3850-24xs-e » Version: N/A
When used together with: Cisco » Catalyst 3850-24xs-s » Version: N/A
When used together with: Cisco » Catalyst 3850-24xu » Version: N/A
When used together with: Cisco » Catalyst 3850-24xu-e » Version: N/A
When used together with: Cisco » Catalyst 3850-24xu-l » Version: N/A
When used together with: Cisco » Catalyst 3850-24xu-s » Version: N/A
When used together with: Cisco » Catalyst 3850-32xs-e » Version: N/A
When used together with: Cisco » Catalyst 3850-32xs-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48f-e » Version: N/A
When used together with: Cisco » Catalyst 3850-48f-l » Version: N/A
When used together with: Cisco » Catalyst 3850-48f-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48p-e » Version: N/A
When used together with: Cisco » Catalyst 3850-48p-l » Version: N/A
When used together with: Cisco » Catalyst 3850-48p-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48pw-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48t-e » Version: N/A
When used together with: Cisco » Catalyst 3850-48t-l » Version: N/A
When used together with: Cisco » Catalyst 3850-48t-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48u » Version: N/A
When used together with: Cisco » Catalyst 3850-48u-e » Version: N/A
When used together with: Cisco » Catalyst 3850-48u-l » Version: N/A
When used together with: Cisco » Catalyst 3850-48u-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48xs » Version: N/A
When used together with: Cisco » Catalyst 3850-48xs-e » Version: N/A
When used together with: Cisco » Catalyst 3850-48xs-f-e » Version: N/A
When used together with: Cisco » Catalyst 3850-48xs-f-s » Version: N/A
When used together with: Cisco » Catalyst 3850-48xs-s » Version: N/A
When used together with: Cisco » Catalyst 3850-nm-2-40g » Version: N/A
When used together with: Cisco » Catalyst 3850-nm-8-10g » Version: N/A
When used together with: Cisco » Catalyst 9300 » Version: N/A
When used together with: Cisco » Catalyst 9300-24p-a » Version: N/A
When used together with: Cisco » Catalyst 9300-24p-e » Version: N/A
When used together with: Cisco » Catalyst 9300-24s-a » Version: N/A
When used together with: Cisco » Catalyst 9300-24s-e » Version: N/A
When used together with: Cisco » Catalyst 9300-24t-a » Version: N/A
When used together with: Cisco » Catalyst 9300-24t-e » Version: N/A
When used together with: Cisco » Catalyst 9300-24u-a » Version: N/A
When used together with: Cisco » Catalyst 9300-24u-e » Version: N/A
When used together with: Cisco » Catalyst 9300-24ux-a » Version: N/A
When used together with: Cisco » Catalyst 9300-24ux-e » Version: N/A
When used together with: Cisco » Catalyst 9300-48p-a » Version: N/A
When used together with: Cisco » Catalyst 9300-48p-e » Version: N/A
When used together with: Cisco » Catalyst 9300-48s-a » Version: N/A
When used together with: Cisco » Catalyst 9300-48s-e » Version: N/A
When used together with: Cisco » Catalyst 9300-48t-a » Version: N/A
When used together with: Cisco » Catalyst 9300-48t-e » Version: N/A
When used together with: Cisco » Catalyst 9300-48u-a » Version: N/A
When used together with: Cisco » Catalyst 9300-48u-e » Version: N/A
When used together with: Cisco » Catalyst 9300-48un-a » Version: N/A
When used together with: Cisco » Catalyst 9300-48un-e » Version: N/A
When used together with: Cisco » Catalyst 9300-48uxm-a » Version: N/A
When used together with: Cisco » Catalyst 9300-48uxm-e » Version: N/A
When used together with: Cisco » Catalyst 9300l » Version: N/A
When used together with: Cisco » Catalyst 9300l-24p-4g-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-24p-4g-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-24p-4x-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-24p-4x-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-24t-4g-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-24t-4g-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-24t-4x-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-24t-4x-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-48p-4g-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-48p-4g-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-48p-4x-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-48p-4x-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-48t-4g-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-48t-4g-e » Version: N/A
When used together with: Cisco » Catalyst 9300l-48t-4x-a » Version: N/A
When used together with: Cisco » Catalyst 9300l-48t-4x-e » Version: N/A
When used together with: Cisco » Catalyst 9300lm » Version: N/A
When used together with: Cisco » Catalyst 9300x » Version: N/A
When used together with: Cisco » Catalyst 9400 » Version: N/A
When used together with: Cisco » Catalyst 9500 » Version: N/A
When used together with: Cisco » Catalyst 9500h » Version: N/A
When used together with: Cisco » Catalyst 9600 » Version: N/A
When used together with: Cisco » Catalyst C3850-12x48u-e » Version: N/A
When used together with: Cisco » Catalyst C3850-12x48u-l » Version: N/A
When used together with: Cisco » Catalyst C3850-12x48u-s » Version: N/A
When used together with: Cisco » Catalyst C9500-12q » Version: N/A
When used together with: Cisco » Catalyst C9500-12q-a » Version: N/A
When used together with: Cisco » Catalyst C9500-12q-e » Version: N/A
When used together with: Cisco » Catalyst C9500-16x » Version: N/A
When used together with: Cisco » Catalyst C9500-16x-a » Version: N/A
When used together with: Cisco » Catalyst C9500-16x-e » Version: N/A
When used together with: Cisco » Catalyst C9500-24q » Version: N/A
When used together with: Cisco » Catalyst C9500-24q-a » Version: N/A
When used together with: Cisco » Catalyst C9500-24q-e » Version: N/A
When used together with: Cisco » Catalyst C9500-24y4c » Version: N/A
When used together with: Cisco » Catalyst C9500-32c » Version: N/A
When used together with: Cisco » Catalyst C9500-32qc » Version: N/A
When used together with: Cisco » Catalyst C9500-40x » Version: N/A
When used together with: Cisco » Catalyst C9500-40x-a » Version: N/A
When used together with: Cisco » Catalyst C9500-40x-e » Version: N/A
When used together with: Cisco » Catalyst C9500-48y4c » Version: N/A
When used together with: Cisco » Catalyst C9600-lc-24c » Version: N/A
When used together with: Cisco » Catalyst C9600-lc-48s » Version: N/A
When used together with: Cisco » Catalyst C9600-lc-48tx » Version: N/A
When used together with: Cisco » Catalyst C9600-lc-48yl » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2022-20870

EPSS FAQ

0.14%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 49 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-20870

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
8.6	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2022-20870

CWE-130 Improper Handling of Length Parameter Inconsistency

The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data.

Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2022-20870

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-mpls-dos-Ab4OUL3

Cisco IOS XE Software for Catalyst Switches MPLS Denial of Service Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2022-20870

Products affected by CVE-2022-20870

Exploit prediction scoring system (EPSS) score for CVE-2022-20870

CVSS scores for CVE-2022-20870

CWE ids for CVE-2022-20870

References for CVE-2022-20870