Out-of-bounds Read in Cisco Catalyst 9800-40
CVE-2020-3399
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device. The vulnerability is due to insufficient input validation during CAPWAP packet processing. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device, resulting in a buffer over-read. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition on the affected device.
EPSS: 0.014 (70.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Catalyst_9800-40
- Cisco Catalyst_9800-80
- Cisco Catalyst_9800-cl
- Cisco Catalyst_9800-l
- Cisco Catalyst_9800-l-c
- Cisco Catalyst_9800-l-f
- Cisco Ios Xe Software — versions n/a
- Cisco Ios_xe — versions 16.12, 16.12.1s, 16.12.2
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3399?
- CVE-2020-3399 is a high-severity vulnerability in Cisco Catalyst 9800-40, classified under Buffer Over-read. CVSS score: 8.6/10. Published 2020-09-24.
- How severe is CVE-2020-3399?
- High severity. CVSS v3 base score is 8.6 out of 10.