CVE-2018-0418 Denial of service in ASR 9000 Series Aggregation Services Router Software

High 8.6 Published 15 Aug 2018 Updated 26 Nov 2024

Unauthenticated remote attackers can cause denial of service on Cisco ASR 9000 routers by injecting malformed Precision Time Protocol traffic.

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-2018-0418?

CVE-2018-0418 is a high-severity denial of service vulnerability in Cisco Ios Xr, published on 15 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Local Packet Transport Services (LPTS) feature set of Cisco ASR 9000 Series Aggregation Services Router Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a lack of input and validation checking on certain Precision Time Protocol (PTP) ingress traffic to an affected device. An attacker could exploit this vulnerability by injecting malformed traffic into an affected device. A successful exploit could allow the attacker to cause services on the device to become unresponsive, resulting in a DoS condition. Cisco Bug IDs: CSCvj22858.

Weakness: CWE-20, CWE-400

Which versions are affected by CVE-2018-0418?

It affects 1 product.

Products include Cisco Ios Xr.

How do I fix CVE-2018-0418?

No fix has been published for CVE-2018-0418 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-2018-0418 being exploited?

There is no known exploitation of CVE-2018-0418 in the wild and no public exploit code.

All Cisco Ios Xr vulnerabilities

Sources

Also known as GHSA-w4jj-rqg4-f8cq.