CVE-2017-3804 Denial of service in Cisco Nexus 5000, 6000, 7000
An unauthenticated adjacent attacker can cause a device reload by sending a crafted IS-IS packet to Cisco Nexus switches.
- 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-2017-3804?
CVE-2017-3804 is a medium-severity denial of service vulnerability in Cisco Nx-Os, published on 26 Jan 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in Intermediate System-to-Intermediate System (IS-IS) protocol packet processing of Cisco Nexus 5000, 6000, and 7000 Series Switches software could allow an unauthenticated, adjacent attacker to cause a reload of the affected device. Switches in the FabricPath domain crash because of an __inst_001__isis_fabricpath hap reset when processing a crafted link-state packet. More Information: CSCvc45002. Known Affected Releases: 7.1(3)N1(2.1) 7.1(3)N1(3.12) 7.3(2)N1(0.296) 8.0(1)S2. Known Fixed Releases: 6.2(18)S11 7.0(3)I5(1.170) 7.0(3)I5(2) 7.1(4)N1(0.4) 7.1(4)N1(1b) 7.1(5)N1(0.986) 7.1(5)N1(1) 7.2(3)D1(0.8) 7.3(2)N1(0.304) 7.3(2)N1(1) 8.0(0.96)S0 8.0(1) 8.0(1)E1 8.0(1)S4 8.3(0)CV(0.788).
Which versions are affected by CVE-2017-3804?
It affects 1 product.
Products include Cisco Nx-Os.
How do I fix CVE-2017-3804?
No fix has been published for CVE-2017-3804 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-2017-3804 being exploited?
There is no known exploitation of CVE-2017-3804 in the wild and no public exploit code.
Other vulnerabilities in Cisco Nx-Os
Sources
Also known as GHSA-4m2r-jc4j-cmfx.