CVE-2018-0252 Denial of service in Cisco Wireless LAN Controller
Remote unauthenticated attackers can cause Cisco Wireless LAN Controllers to reload by sending malformed IPv4 fragments, resulting in 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-2018-0252?
CVE-2018-0252 is a high-severity denial of service vulnerability in Cisco Wireless Lan Controller Software, 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 IP Version 4 (IPv4) fragment reassembly function of Cisco 3500, 5500, and 8500 Series Wireless LAN Controller Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to a corruption of an internal data structure process that occurs when the affected software reassembles certain IPv4 packets. An attacker could exploit this vulnerability by sending certain malformed IPv4 fragments to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability affects all releases of 8.4 until the first fixed release for the 5500 and 8500 Series Wireless LAN Controllers and releases 8.5.103.0 and 8.5.105.0 for the 3500, 5500, and 8500 Series Wireless LAN Controllers. Cisco Bug IDs: CSCvf89222.
Which versions are affected by CVE-2018-0252?
It affects 1 product.
Products include Cisco Wireless Lan Controller Software.
How do I fix CVE-2018-0252?
No fix has been published for CVE-2018-0252 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-2018-0252 being exploited?
There is no known exploitation of CVE-2018-0252 in the wild and no public exploit code.
Other vulnerabilities in Cisco Wireless Lan Controller Software
Sources
Also known as GHSA-rfmq-5r75-j8r9.