cisco-sa-20191016-airo-dos: Cisco Aironet Access Points Bridge Protocol Data Unit Port Disable Denial of Service Vulnerability
A vulnerability in the bridge protocol data unit (BPDU) forwarding functionality of Cisco Aironet Access Points (APs) could allow an unauthenticated, adjacent attacker to cause an AP port to go into an error disabled state. The vulnerability occurs because BPDUs received from specific wireless clients are forwarded incorrectly. An attacker could exploit this vulnerability on the wireless network by sending a steady stream of crafted BPDU frames. A successful exploit could allow the attacker to cause a limited denial of service (DoS) attack because an AP port could go offline. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191016-airo-dos
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Frequently Asked Questions
What is the severity of cisco-sa-20191016-airo-dos?
The severity of cisco-sa-20191016-airo-dos is rated as high due to the potential for an unauthenticated attack leading to service disruption.
How do I fix cisco-sa-20191016-airo-dos?
To fix cisco-sa-20191016-airo-dos, apply the recommended software updates provided by Cisco for the affected Aironet Access Points.
What is the impact of cisco-sa-20191016-airo-dos?
The impact of cisco-sa-20191016-airo-dos includes the possibility of access points entering an error disabled state, leading to loss of connectivity.
Who is affected by cisco-sa-20191016-airo-dos?
Cisco Aironet Access Point devices that utilize BPDU forwarding functionality are affected by cisco-sa-20191016-airo-dos.
Is there a workaround for cisco-sa-20191016-airo-dos?
Currently, Cisco advises applying the software updates as the primary mitigative measure for cisco-sa-20191016-airo-dos.