CVE-2020-3220

MEDIUM

Cisco IOS XE - Unauthenticated Denial of Service via ESP Packet Tampering

Title source: llm
STIX 2.1

Description

A vulnerability in the hardware crypto driver of Cisco IOS XE Software for Cisco 4300 Series Integrated Services Routers and Cisco Catalyst 9800-L Wireless Controllers could allow an unauthenticated, remote attacker to disconnect legitimate IPsec VPN sessions to an affected device. The vulnerability is 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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.8
EPSS 0.0042
EPSS Percentile 62.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-345
Status published
Products (50)
cisco/ios_xe 16.4.1
cisco/ios_xe 16.4.2
cisco/ios_xe 16.4.3
cisco/ios_xe 16.5.1
cisco/ios_xe 16.5.1a
cisco/ios_xe 16.5.1b
cisco/ios_xe 16.5.2
cisco/ios_xe 16.5.3
cisco/ios_xe 16.6.1
cisco/ios_xe 16.6.2
... and 40 more
Published Jun 03, 2020
Tracked Since Feb 18, 2026