Cisco IOS XE Software IPsec VPN DoS (cisco-sa-iosxe-vpn-dos-edOmW28Z)

medium Nessus Plugin ID 138211

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 denial of service (DoS) vulnerability in the hardware crypto driver due to insufficient verification of authenticity of received Encapsulating Security Payload (ESP) packets. An attacker could exploit this vulnerability by tampering with ESP cleartext values as a man-in-the-middle in order disconnect legitimate IPsec VPN sessions to an affected device.

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

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvq67658

See Also

http://www.nessus.org/u?ec976823

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq67658

Plugin Details

Severity: Medium

ID: 138211

File Name: cisco-sa-iosxe-vpn-dos-edOmW28Z-iosxe.nasl

Version: 1.9

Type: combined

Family: CISCO

Published: 7/8/2020

Updated: 5/3/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS Score Source: CVE-2020-3220

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/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, Host/Cisco/device_model

Exploit Ease: No known exploits are available

Patch Publication Date: 6/3/2020

Vulnerability Publication Date: 6/3/2020

Reference Information

CVE: CVE-2020-3220

CWE: 345

CISCO-SA: cisco-sa-iosxe-vpn-dos-edOmW28Z

IAVA: 2020-A-0239-S

CISCO-BUG-ID: CSCvq67658