CVE-2017-6666 Denial of service in Cisco Network Convergence System 5500 Series Routers
An authenticated local attacker can cause a denial of service by stopping traffic forwarding on Cisco NCS 5500 routers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6666?
CVE-2017-6666 is a medium-severity denial of service vulnerability in Cisco Ios Xr, 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 forwarding component of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers could allow an authenticated, local attacker to cause the router to stop forwarding data traffic across Traffic Engineering (TE) tunnels, resulting in a denial of service (DoS) condition. More Information: CSCvd16665. Known Affected Releases: 6.2.11.BASE. Known Fixed Releases: 6.1.3 6.1.2 6.3.1.8i.BASE 6.2.11.8i.BASE 6.2.2.9i.BASE 6.1.32.11i.BASE 6.1.31.10i.BASE 6.1.4.3i.BASE.
Which versions are affected by CVE-2017-6666?
It affects 1 product.
Products include Cisco Ios Xr.
How do I fix CVE-2017-6666?
No fix has been published for CVE-2017-6666 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-2017-6666 being exploited?
There is no known exploitation of CVE-2017-6666 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xr
- CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String
- CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
Sources
Also known as GHSA-f277-hhxj-fvx5.