Cisco IOS XR Software MPLS Pseudowire Interfaces Access Control List Bypass (CSCwh77265)

medium Nessus Plugin ID 206039

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS XR is affected by a vulnerability.

- 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. (CVE-2024-20322)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwh77265

Plugin Details

Severity: Medium

ID: 206039

File Name: cisco-sa-iosxr-acl-bypass-RZU5NL3e-iosxr-CSCwh77265.nasl

Version: 1.2

Type: combined

Family: CISCO

Published: 8/21/2024

Updated: 8/22/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2024-20322

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xr

Required KB Items: Host/Cisco/IOS-XR/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/13/2024

Vulnerability Publication Date: 3/13/2024

Reference Information

CVE: CVE-2024-20322

CISCO-SA: cisco-sa-iosxr-acl-bypass-RZU5NL3e

CISCO-BUG-ID: CSCwh77265

Detections

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