CVE-2021-1565 Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Service Vulnerabilities
Unauthenticated remote attackers can cause denial of service on Cisco Catalyst 9000 wireless controllers by sending malformed CAPWAP packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1565?
CVE-2021-1565 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 23 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Multiple vulnerabilities in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. An attacker could exploit the vulnerabilities by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.
Weakness: CWE-415
Which versions are affected by CVE-2021-1565?
It affects 3 products.
Products include Cisco Catalyst 9800 Firmware, Cisco Embedded Wireless Controller, Cisco Ios Xe.
How do I fix CVE-2021-1565?
No fix has been published for CVE-2021-1565 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-1565 being exploited?
There is no known exploitation of CVE-2021-1565 in the wild and no public exploit code.
Sources
Also known as GHSA-m69p-8v8r-jhcc.