CVE-2017-6678 Denial of service in Cisco Virtualized Packet Core-Distributed Instance
Remote unauthenticated attackers can cause a denial of service by sending crafted UDP packets to Cisco VPC-DI systems, forcing control instances to reload.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6678?
CVE-2017-6678 is a high-severity denial of service vulnerability in Cisco Virtualized Packet Core-Distributed Instance, published on 26 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the ingress UDP packet processing functionality of Cisco Virtualized Packet Core-Distributed Instance (VPC-DI) Software 19.2 through 21.0 could allow an unauthenticated, remote attacker to cause both control function (CF) instances on an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient handling of user-supplied data by the affected software. An attacker could exploit this vulnerability by sending crafted UDP packets to the distributed instance (DI) network addresses of both CF instances on an affected system. A successful exploit could allow the attacker to cause an unhandled error condition on the affected system, which would cause the CF instances to reload and consequently cause the entire VPC to reload, resulting in the disconnection of all subscribers and a DoS condition on the affected system. This vulnerability can be exploited via IPv4 traffic only. Cisco Bug IDs: CSCvc01665 CSCvc35565.
Which versions are affected by CVE-2017-6678?
It affects 1 product.
Products include Cisco Virtualized Packet Core.
How do I fix CVE-2017-6678?
No fix has been published for CVE-2017-6678 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-2017-6678 being exploited?
There is no known exploitation of CVE-2017-6678 in the wild and no public exploit code.
Sources
Also known as GHSA-v4pq-j6r7-9qhv.