CVE-2024-20322: Medium severity cisco ios xrv 9000 vulnerability

Published Mar 13, 2024

Updated

A vulnerability in the access control list (ACL) processing on Pseudowire interfaces in the ingress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to improper assignment of lookup keys to internal interface contexts. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to access resources behind the affected device that were supposed to be protected by a configured ACL.

Affected Software

78 affected components

Cisco IOS XR Software

All of the following

Any of the following

Cisco IOS XR=7.10.2

Cisco IOS XR=7.11

Any of the following

Cisco 8011-4g24y4h-i

Cisco 8101-32fh

Cisco 8101-32fh-o

Cisco 8101-32h-o

Cisco 8102-28fh-dpu-o

Cisco 8102-64h

Cisco 8102-64h-o

Cisco 8111-32eh-o

Cisco 8122-64eh-o

Cisco 8122-64ehf-o

Cisco 8201

Cisco 8201-24h8fh

Cisco 8201-32fh

Cisco 8201-32fh-o

Cisco 8202

Cisco 8202-32fh-m

Cisco 8212-48fh-m

Cisco 8404

Cisco 8501-sys-mt

Cisco 8608

Cisco 8700

Cisco 8711-32fh-m

Cisco 8712-mod-m

Cisco 8804

Cisco 8808

Cisco 8812

Cisco 8818

Cisco Ncs 540-12z20g-sys-a

Cisco Ncs 540-12z20g-sys-d

Cisco Ncs 540-24q2c2dd-sys

Cisco Ncs 540-24q8l2dd-sys

Cisco Ncs 540-24z8q2c-sys

Cisco Ncs 540-28z4c-sys-a

Cisco Ncs 540-28z4c-sys-d

Cisco Ncs 540-6z14s-sys-d

Cisco Ncs 540-6z18g-sys-a

Cisco Ncs 540-6z18g-sys-d

Cisco Ncs 540-acc-sys

Cisco Ncs 540-fh-agg

Cisco Ncs 540-fh-csr-sys

Cisco Ncs 540x-12z16g-sys-a

Cisco Ncs 540x-12z16g-sys-d

Cisco Ncs 540x-16z4g8q2c-a

Cisco Ncs 540x-16z4g8q2c-d

Cisco Ncs 540x-16z8q2c-d

Cisco Ncs 540x-4z14g2q-a

Cisco Ncs 540x-4z14g2q-d

Cisco Ncs 540x-6z18g-sys-a

Cisco Ncs 540x-6z18g-sys-d

Cisco Ncs 540x-8z16g-sys-a

Cisco Ncs 540x-8z16g-sys-d

Cisco Ncs 540x-acc-sys

Cisco Ncs 5501

Cisco Ncs 5501-se

Cisco Ncs 5502

Cisco Ncs 5502-se

Cisco Ncs 5504

Cisco Ncs 5508

Cisco Ncs 5516

Cisco Ncs 55a1-24h

Cisco Ncs 55a1-24q6h-s

Cisco Ncs 55a1-24q6h-ss

Cisco Ncs 55a1-36h

Cisco Ncs 55a1-36h-se

Cisco Ncs 55a1-48q6h

Cisco Ncs 55a2-mod-hd-s

Cisco Ncs 55a2-mod-s

Cisco Ncs 55a2-mod-se-s

Cisco Ncs 560-4

Cisco Ncs 560-7

Cisco Ncs 57b1-5dse-sys

Cisco Ncs 57b1-6d24-sys

Cisco Ncs 57c1-48q6-sys

Cisco Ncs 57c3-mod-sys

Cisco Ncs 57d2-18dd-sys

Event History

Mar 13, 2024

CVE Published

via MITRE·04:43 PM

Data Sourced

via MITRE·04:43 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·05:15 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2024-20322?

The CVE-2024-20322 vulnerability is rated as high severity due to its potential for allowing unauthorized bypass of access control lists.

How do I fix CVE-2024-20322?

To fix CVE-2024-20322, update your Cisco IOS XR Software to the latest version that addresses this vulnerability as recommended by Cisco.

Who is affected by CVE-2024-20322?

CVE-2024-20322 affects users of Cisco IOS XR Software specifically those implementing access control lists on Pseudowire interfaces.

What exploit is associated with CVE-2024-20322?

CVE-2024-20322 can be exploited by unauthenticated, remote attackers to bypass configured access control lists on affected devices.

Is there a workaround for CVE-2024-20322?

Currently, there are no official workarounds for CVE-2024-20322, so applying the available security updates is crucial.