CVE-2020-3359: Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers Multicast DNS Denial of Service Vulnerability
A vulnerability in the multicast DNS (mDNS) feature 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. The vulnerability is due to improper validation of mDNS packets. An attacker could exploit this vulnerability by sending a crafted mDNS packet to an affected device. A successful exploit could cause a device to reload, resulting in a DoS condition.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID for this Cisco IOS XE Software vulnerability?
The vulnerability ID for this Cisco IOS XE Software vulnerability is CVE-2020-3359.
What is the severity level of CVE-2020-3359?
CVE-2020-3359 has a severity level of 8.6 (high).
What is the affected software for CVE-2020-3359?
The affected software for CVE-2020-3359 is Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers version 16.12.1.
How can an attacker exploit CVE-2020-3359?
An attacker can exploit CVE-2020-3359 by sending malicious multicast DNS packets to the vulnerable device.
Is there a fix available for CVE-2020-3359?
Yes, Cisco has released a security advisory with mitigation details for CVE-2020-3359. Please refer to the official advisory for more information.