CVE-2017-6603 Denial of service in Cisco ASR 903 and ASR 920 Series Devices
An unauthenticated adjacent attacker can cause a denial of service on Cisco ASR 903/920 devices with RSP2 cards via incorrect IPv6 packet processing.
- 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-2017-6603?
CVE-2017-6603 is a medium-severity denial of service vulnerability in Cisco ASR 903 and ASR 920 Series Devices, published on 7 Apr 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in Cisco ASR 903 or ASR 920 Series Devices running with an RSP2 card could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on a targeted system because of incorrect IPv6 Packet Processing. More Information: CSCuy94366. Known Affected Releases: 15.4(3)S3.15. Known Fixed Releases: 15.6(2)SP 15.6(1.31)SP.
Which versions are affected by CVE-2017-6603?
It affects 1 product.
Products include Cisco Asr 900 Series Firmware.
How do I fix CVE-2017-6603?
No fix has been published for CVE-2017-6603 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-2017-6603 being exploited?
There is no known exploitation of CVE-2017-6603 in the wild and no public exploit code.
Sources
Also known as GHSA-h4x6-qj3h-xgg8.