CVE-2020-3359: Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers Multicast DNS Denial of Service Vulnerability
First published: Thu Sep 24 2020(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.12.1 | |
| Cisco 2610xm | ||
| Cisco 2611xm | ||
| Cisco 2612 | ||
| Cisco 2620xm | ||
| Cisco 2621xm | ||
| Cisco 2650xm | ||
| Cisco 2651xm | ||
| Cisco 2691 | ||
| 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 |
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Reference Links
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.
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- agent/title
- agent/author
- agent/weakness
- agent/references
- agent/last-modified-date
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/16.12.1
- canonical/cisco 2610xm
- canonical/cisco 2611xm
- canonical/cisco 2612
- canonical/cisco 2620xm
- canonical/cisco 2621xm
- canonical/cisco 2650xm
- canonical/cisco 2651xm
- canonical/cisco 2691
- canonical/cisco catalyst 9800-40
- canonical/cisco catalyst 9800-80
- canonical/cisco catalyst 9800-cl
- canonical/cisco catalyst 9800-l
- canonical/cisco catalyst 9800-l-c
- canonical/cisco catalyst 9800-l-f