Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service Vulnerability (cisco-sa-sxp-68TEVzR)

high Nessus Plugin ID 137655

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

A denial of service (DoS) vulnerability exists in Security Group Tag Exchange Protocol (SXP) in Cisco IOS Software, Cisco IOS XE Software, and Cisco NX-OS Software due to crafted SXP packets being mishandled. An unauthenticated, remote attacker can exploit this issue, by sending specifically crafted SXP packets to the affected device, to cause the device to reload, resulting in a DoS condition.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvd71220, CSCvp96954, CSCvt30182

Plugin Details

Severity: High

ID: 137655

File Name: cisco-sa-sxp-68TEVzR-iosxe.nasl

Version: 1.10

Type: local

Family: CISCO

Published: 6/19/2020

Updated: 4/28/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2020-3228

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: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 6/3/2020

Vulnerability Publication Date: 6/3/2020

Reference Information

CVE: CVE-2020-3228

CWE: 20

CISCO-SA: cisco-sa-sxp-68TEVzR

IAVA: 2020-A-0260

CISCO-BUG-ID: CSCvd71220, CSCvp96954, CSCvt30182

Detections

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