CVE-2021-34740 Cisco Aironet Access Points WLAN Control Protocol Packet Buffer Leak Denial of Service Vulnerability
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2021-34740?
CVE-2021-34740 is a high-severity vulnerability in Cisco Aironet Access Point Software, published on 23 Sep 2021.
Official description
A vulnerability in the WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of the affected device.
Weakness: CWE-401
Which versions are affected by CVE-2021-34740?
It affects 1 product.
Products include Cisco Aironet Access Point Software.
How do I fix CVE-2021-34740?
No fix has been published for CVE-2021-34740 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34740 being exploited?
There is no known exploitation of CVE-2021-34740 in the wild and no public exploit code.
Other vulnerabilities in Cisco Aironet Access Point Software
- CVE-2017-3831 Auth bypass in Cisco Mobility Express 1800 Access Point Series
- CVE-2022-20622 Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability
- CVE-2018-0234 Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points
- CVE-2016-1419 Denial of service in n/a
- CVE-2016-6362 Privilege escalation in n/a
Sources
Also known as GHSA-8j6f-39hh-f4v6.