CVE-2020-3390: Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family SNMP Trap Denial of Service Vulnerability
First published: Thu Sep 24 2020(Updated: )
A vulnerability in Simple Network Management Protocol (SNMP) trap generation for wireless clients of the Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause the device to unexpectedly reload, causing a denial of service (DoS) condition on an affected device. The vulnerability is due to the lack of input validation of the information used to generate an SNMP trap in relation to a wireless client connection. An attacker could exploit this vulnerability by sending an 802.1x packet with crafted parameters during the wireless authentication setup phase of a connection. A successful exploit could allow the attacker to cause the device to reload, causing a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.12.1 | |
| 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 CVE-2020-3390?
CVE-2020-3390 is a vulnerability in the Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family that could allow an unauthenticated attacker to cause the device to unexpectedly reload, causing a denial of service.
How does CVE-2020-3390 affect Cisco devices?
CVE-2020-3390 can affect Cisco devices running the Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family and enables an attacker to trigger a denial of service by causing the device to unexpectedly reload.
What is the severity of CVE-2020-3390?
The severity of CVE-2020-3390 is rated as high with a CVSS score of 7.4.
How can I fix CVE-2020-3390?
To fix CVE-2020-3390, it is recommended to upgrade to a fixed software release provided by Cisco.
Where can I find more information about CVE-2020-3390?
More information about CVE-2020-3390 can be found on the Cisco Security Advisory page at https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ewlc-snmp-dos-wNkedg9K.
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- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/16.12.1
- 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