CVE-2019-1752 Cisco IOS and IOS XE Software ISDN Interface Denial of Service Vulnerability

High 8.6 Published 28 Mar 2019 Updated 17 Sep 2024

Remote unauthenticated attackers can cause Cisco IOS devices to reload via malicious ISDN calls, resulting in denial of service.

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-2019-1752?

CVE-2019-1752 is a high-severity denial of service vulnerability in Cisco Ios, published on 28 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 ISDN functions of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect processing of specific values in the Q.931 information elements. An attacker could exploit this vulnerability by calling the affected device with specific Q.931 information elements being present. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device.

Weakness: CWE-20

Which versions are affected by CVE-2019-1752?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2019-1752?

No fix has been published for CVE-2019-1752 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-2019-1752 being exploited?

There is no known exploitation of CVE-2019-1752 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-2mf8-3wf7-hj2g.