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Cisco Nexus 3000 9000 Series Switches Protocol Independent Multicast Version 6 DoS (cisco-sa-nxospc-pim6-vG4jFPh)

medium Nessus Plugin ID 272740

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco NX-OS Software is affected by a vulnerability.

 - A vulnerability in the Protocol Independent Multicast Version 6 (PIM6) feature of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an authenticated, low- privileged, remote attacker to trigger a crash of the PIM6 process, resulting in a denial of service (DoS) condition. This vulnerability is due to improper processing of PIM6 ephemeral data queries. An attacker could exploit this vulnerability by sending a crafted ephemeral query to an affected device through one of the following methods: NX-API REST, NETCONF, RESTConf, gRPC, or Model Driven Telemetry. A successful exploit could allow the attacker to cause the PIM6 process to crash and restart, causing potential adjacency flaps and resulting in a DoS of the PIM6 and ephemeral query processes. (CVE-2025-20262)

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

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwn69044

See Also

http://www.nessus.org/u?2c198619

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn69044

Plugin Details

Severity: Medium

ID: 272740

File Name: cisco-sa-nxospc-pim6-vG4jFPh.nasl

Version: 1.1

Type: combined

Family: CISCO

Published: 11/5/2025

Updated: 11/5/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2025-20262

CVSS v3

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.4

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

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

Vulnerability Information

CPE: cpe:/o:cisco:nx-os

Required KB Items: Host/Cisco/NX-OS/Version, Host/Cisco/NX-OS/Model, Host/Cisco/NX-OS/Device

Exploit Ease: No known exploits are available

Patch Publication Date: 8/27/2025

Vulnerability Publication Date: 8/27/2025

Reference Information

CVE: CVE-2025-20262

CWE: 476

CISCO-SA: cisco-sa-nxospc-pim6-vG4jFPh

IAVA: 2025-A-0701

CISCO-BUG-ID: CSCwn69044