Cisco IOS XE on Catalyst MPLS Packet length parameter

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco IOS XE on Catalyst and classified as problematic. The affected element is an unknown function of the component MPLS Packet Handler. Performing a manipulation results in length parameter. This vulnerability is identified as CVE-2022-20870. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco IOS XE on Catalyst (Router Operating System) (the affected version unknown). It has been classified as critical. This affects an unknown part of the component MPLS Packet Handler. The manipulation with an unknown input leads to a length parameter vulnerability. CWE is classifying the issue as CWE-130. 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. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was released 10/11/2022 as cisco-sa-iosxe-mpls-dos-Ab4OUL3. The advisory is shared at tools.cisco.com. This vulnerability is uniquely identified as CVE-2022-20870 since 11/02/2021. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Length parameter
CWE: CWE-130 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/02/2021 🔍
10/11/2022 +342 days 🔍
10/11/2022 +0 days 🔍
10/31/2022 +20 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-iosxe-mpls-dos-Ab4OUL3
Status: Confirmed

CVE: CVE-2022-20870 (🔍)
GCVE (CVE): GCVE-0-2022-20870
GCVE (VulDB): GCVE-100-210381
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 10/11/2022 09:47
Updated: 10/31/2022 14:44
Changes: 10/11/2022 09:47 (51), 10/31/2022 14:44 (11)
Complete: 🔍
Cache ID: 216::103

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