CVE-2019-1617 Cisco Nexus 9000 Series Switches Standalone NX-OS Mode Fibre Channel over Ethernet NPV Denial of Service Vulnerability
An adjacent attacker can cause a denial of service on Cisco Nexus switches by sending crafted FCoE frames when the NPV feature is uninstalled.
- 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-2019-1617?
CVE-2019-1617 is a high-severity denial of service vulnerability in Cisco Nx-Os, published on 11 Mar 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 Fibre Channel over Ethernet (FCoE) N-port Virtualization (NPV) protocol implementation in Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to an incorrect processing of FCoE packets when the fcoe-npv feature is uninstalled. An attacker could exploit this vulnerability by sending a stream of FCoE frames from an adjacent host to an affected device. An exploit could allow the attacker to cause packet amplification to occur, resulting in the saturation of interfaces and a DoS condition. Nexus 9000 Series Switches in Standalone NX-OS Mode are affected running software versions prior to 7.0(3)I7(5) and 9.2(2).
Weakness: CWE-913
Which versions are affected by CVE-2019-1617?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2019-1617?
No fix has been published for CVE-2019-1617 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-2019-1617 being exploited?
There is no known exploitation of CVE-2019-1617 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-x732-f4pc-ff5p.