Detections
Analytics

Cisco IOS XE Software DHCP Snooping DoS (cisco-sa-iosxe-dhcpsn-dos-xBn8Mtks)

high Nessus Plugin ID 325432

Synopsis

The remote device is missing a vendor-supplied security patch

Description

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

 - A vulnerability in the DHCP snooping security feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a full interface queue wedge, which could result in a denial of service (DoS) condition. This vulnerability is due to improper handling of DHCP request packets. An attacker could exploit this vulnerability by sending DHCP request packets to an affected device. A successful exploit could allow the attacker to cause packets to wedge in the queue, creating a DoS condition for downstream devices of the affected system and requiring that the system restart to drain the queue. Note: This vulnerability can be exploited with either unicast or broadcast DHCP packets on a VLAN that does not have DHCP snooping enabled. (CVE-2025-20162)

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 CSCwm45385

See Also

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwm45385

http://www.nessus.org/u?564dd2a1

http://www.nessus.org/u?ce536cfd

Plugin Details

Severity: High

ID: 325432

File Name: cisco-sa-iosxe-dhcpsn-dos-xBn8Mtks-iosxe.nasl

Version: 1.1

Type: Combined

Family: CISCO

Published: 7/7/2026

Updated: 7/7/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

Percentile: 50.87

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-20162

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Settings/ParanoidReport, Host/Cisco/IOS-XE/Version, Host/Cisco/IOS-XE/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 5/7/2025

Vulnerability Publication Date: 5/7/2025

Reference Information

CVE: CVE-2025-20162

CWE: 400

CISCO-SA: cisco-sa-iosxe-dhcpsn-dos-xBn8Mtks

IAVA: 2025-A-0318

CISCO-BUG-ID: CSCwm45385