CVE-2019-1834 Cisco Aironet Series Access Points Denial of Service Vulnerability
An adjacent attacker can cause a denial of service on Cisco Aironet Access Points by sending crafted wireless packets when port security is enabled on the connected switch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1834?
CVE-2019-1834 is a high-severity denial of service vulnerability in Cisco Aironet Access Point Software, published on 18 Apr 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the internal packet processing of Cisco Aironet Series Access Points (APs) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected AP if the switch interface where the AP is connected has port security configured. The vulnerability exists because the AP forwards some malformed wireless client packets outside of the Control and Provisioning of Wireless Access Points (CAPWAP) tunnel. An attacker could exploit this vulnerability by sending crafted wireless packets to an affected AP. A successful exploit could allow the attacker to trigger a security violation on the adjacent switch port, which could result in a DoS condition. Note: Though the Common Vulnerability Scoring System (CVSS) score corresponds to a High Security Impact Rating (SIR), this vulnerability is considered Medium because a workaround is available and exploitation requires a specific switch configuration. There are workarounds that address this vulnerability.
Weakness: CWE-20
Which versions are affected by CVE-2019-1834?
It affects 1 product.
Products include Cisco Aironet Access Point Firmware.
How do I fix CVE-2019-1834?
No fix has been published for CVE-2019-1834 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-2019-1834 being exploited?
There is no known exploitation of CVE-2019-1834 in the wild and no public exploit code.
Other vulnerabilities in Cisco Aironet Access Point Software
- CVE-2017-3834 Hardcoded credentials in Cisco Aironet 1830 Series and 1850 Series Access Points
- CVE-2017-3873 Code injection in Cisco Aironet 1800, 2800, and 3800 Series Access Points
- CVE-2019-1826 Cisco Aironet Series Access Points Quality of Service Denial of Service Vulnerability
- CVE-2019-1829 Cisco Aironet Series Access Points Command Injection Vulnerability
- CVE-2019-1835 Cisco Aironet Series Access Points Directory Traversal Vulnerability
Sources
Also known as GHSA-mvvv-8xrh-cv67.