CVE-2018-0209 Denial of service in Cisco 550X Series Stackable Managed Switches
An authenticated remote attacker can cause a Cisco 550X switch to reload unexpectedly by sending heavy SNMP traffic, resulting in a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-0209?
CVE-2018-0209 is a high-severity denial of service vulnerability in Cisco 550X Series Stackable Managed Switches, published on 8 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem communication channel through the Cisco 550X Series Stackable Managed Switches could allow an authenticated, remote attacker to cause the device to reload unexpectedly, causing a denial of service (DoS) condition. The device nay need to be manually reloaded to recover. The vulnerability is due to lack of proper input throttling of ingress SNMP traffic over an internal interface. An attacker could exploit this vulnerability by sending a crafted, heavy stream of SNMP traffic to the targeted device. An exploit could allow the attacker to cause the device to reload unexpectedly, causing a DoS condition. Cisco Bug IDs: CSCvg22135.
Weakness: CWE-119
Which versions are affected by CVE-2018-0209?
It affects 1 product.
Products include Cisco Small Business 500 Series Stackable Managed Switches Firmware.
How do I fix CVE-2018-0209?
No fix has been published for CVE-2018-0209 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-2018-0209 being exploited?
There is no known exploitation of CVE-2018-0209 in the wild and no public exploit code.
Sources
Also known as GHSA-xxm7-jh4x-3p4j.