CVE-2017-6655 Denial of service in Cisco NX-OS Software Fibre Channel over Ethernet
An unauthenticated adjacent attacker can cause a denial of service in Cisco NX-OS devices configured for FCoE by triggering a process reload.
- 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-2017-6655?
CVE-2017-6655 is a medium-severity denial of service vulnerability in Cisco Nx-Os, published on 13 Jun 2017. 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) protocol implementation in Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition when an FCoE-related process unexpectedly reloads. This vulnerability affects Cisco NX-OS Software on the following Cisco devices when they are configured for FCoE: Multilayer Director Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches. More Information: CSCvc91729. Known Affected Releases: 8.3(0)CV(0.833). Known Fixed Releases: 8.3(0)ISH(0.62) 8.3(0)CV(0.944) 8.1(1) 8.1(0.8)S0 7.3(2)D1(0.47).
Weakness: CWE-119
Which versions are affected by CVE-2017-6655?
It affects 5 products.
Products include Cisco Mds 9000 Nx-Os, Cisco Nx-Os, Cisco Nx-Os for Nexus 5500 Platform Switches, Cisco Nx-Os for Nexus 5600 Platform Switches, Cisco Nx-Os for Nexus 7700 Series Switches.
How do I fix CVE-2017-6655?
No fix has been published for CVE-2017-6655 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-2017-6655 being exploited?
There is no known exploitation of CVE-2017-6655 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-ffjq-497x-2qq5.