CVE-2019-1737 Cisco IOS and IOS XE Software IP Service Level Agreement Denial of Service Vulnerability

High 8.6 Published 27 Mar 2019 Updated 19 Nov 2024

Remote attackers can cause a denial of service on Cisco IOS devices by sending crafted IP SLA packets, requiring vendor patches.

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-2019-1737?

CVE-2019-1737 is a high-severity denial of service vulnerability in Cisco Ios, published on 27 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the processing of IP Service Level Agreement (SLA) packets by Cisco IOS Software and Cisco IOS XE software could allow an unauthenticated, remote attacker to cause an interface wedge and an eventual denial of service (DoS) condition on the affected device. The vulnerability is due to improper socket resources handling in the IP SLA responder application code. An attacker could exploit this vulnerability by sending crafted IP SLA packets to an affected device. An exploit could allow the attacker to cause an interface to become wedged, resulting in an eventual denial of service (DoS) condition on the affected device.

Weakness: CWE-770, CWE-400

Which versions are affected by CVE-2019-1737?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2019-1737?

No fix has been published for CVE-2019-1737 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-2019-1737 being exploited?

There is no known exploitation of CVE-2019-1737 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-rj49-4mj7-h39g.