CVE-2018-0234 Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points
Remote attackers can crash Cisco Aironet access points by sending malicious GRE frames, causing a denial of service.
- 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-2018-0234?
CVE-2018-0234 is a high-severity denial of service vulnerability in Cisco Aironet 1810, 1830, and 1850 Series Access Points, published on 2 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the implementation of Point-to-Point Tunneling Protocol (PPTP) functionality in Cisco Aironet 1810, 1830, and 1850 Series Access Points could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of Generic Routing Encapsulation (GRE) frames that pass through the data plane of an affected access point. An attacker could exploit this vulnerability by initiating a PPTP connection to an affected access point from a device that is registered to the same wireless network as the access point and sending a malicious GRE frame through the data plane of the access point. A successful exploit could allow the attacker to cause the NSS core process on the affected access point to crash, which would cause the access point to reload and result in a DoS condition. This vulnerability affects Cisco Aironet 1810, 1830, and 1850 Series Access Points that are running Cisco Mobility Express Software Release 8.4.100.0, 8.5.103.0, or 8.5.105.0 and are configured as a master, subordinate, or standalone access point. Cisco Bug IDs: CSCvf73890.
Weakness: CWE-20
Which versions are affected by CVE-2018-0234?
It affects 1 product.
Products include Cisco Aironet Access Point Software.
How do I fix CVE-2018-0234?
No fix has been published for CVE-2018-0234 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-2018-0234 being exploited?
There is no known exploitation of CVE-2018-0234 in the wild and no public exploit code.
Other vulnerabilities in Cisco Aironet 1810, 1830, and 1850 Series Access Points
- 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-2016-1419 Denial of service in n/a
- CVE-2016-6362 Privilege escalation in n/a
- CVE-2015-6367 Denial of service in n/a
Sources
Also known as GHSA-h937-x287-5g89.