CVE-2019-15262 Cisco Wireless LAN Controller Secure Shell Denial of Service Vulnerability
Unauthenticated remote attackers can cause denial of service on Cisco Wireless LAN Controllers by exhausting resources through repeated SSH connections.
- 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-2019-15262?
CVE-2019-15262 is a high-severity denial of service vulnerability in Cisco Wireless LAN Controller (WLC), published on 16 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the Secure Shell (SSH) session management for Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability exists because the SSH process is not properly deleted when an SSH connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly opening SSH connections to an affected device. A successful exploit could allow the attacker to exhaust system resources by initiating multiple SSH connections to the device that are not effectively terminated, which could result in a DoS condition.
Which versions are affected by CVE-2019-15262?
It affects 2 products.
Products include Cisco 5508 Wireless Lan Controller Firmware, Cisco 5520 Wireless Lan Controller Firmware.
How do I fix CVE-2019-15262?
No fix has been published for CVE-2019-15262 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-2019-15262 being exploited?
There is no known exploitation of CVE-2019-15262 in the wild and no public exploit code.
Sources
Also known as GHSA-mhfm-gfg6-rpxf.