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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (42.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cisco iOS Xe Software 16.4.1
- Cisco iOS Xe — versions 16.4.1, 16.4.2, 16.4.3
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-vp… (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.