CVE-2020-3220CWE-345

Cisco IOS XE Software IPsec VPN Denial of Service Vulnerability

Medium · published June 3, 2020

CVSS v3.0
6.8
EPSS
1%
Percentile
43.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
6.8 · MEDIUM
Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00529 · 43.9th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2020-06-03T17:41Z
EPSS history
Timeline
  • 03 JUN 17:41Z
    Cisco IOS XE Software IPsec VPN Denial of Service Vulnerability
    cvelistv5