What is CVE-2020-3220?

CVE-2020-3220 is a medium-severity vulnerability in Cisco Ios Xe Software 16.4.1, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.8/10. Published 2020-06-03.

How severe is CVE-2020-3220?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Cisco Ios Xe Software 16.4.1

CVE-2020-3220

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.

EPSS: 0.005 (41.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Ios Xe Software 16.4.1 — versions n/a
Cisco Ios_xe — versions 16.4.1, 16.4.2, 16.4.3

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-3220?: CVE-2020-3220 is a medium-severity vulnerability in Cisco Ios Xe Software 16.4.1, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.8/10. Published 2020-06-03.
How severe is CVE-2020-3220?: Medium severity. CVSS v3 base score is 6.8 out of 10.