CVE-2019-12647 Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability

High 8.6 Published 25 Sep 2019 Updated 19 Nov 2024

Remote attackers can cause Cisco IOS devices to reload via a NULL pointer dereference in the Ident protocol handler, 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-2019-12647?

CVE-2019-12647 is a high-severity vulnerability in Cisco Ios Xe, published on 25 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Ident protocol handler of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability exists because the affected software incorrectly handles memory structures, leading to a NULL pointer dereference. An attacker could exploit this vulnerability by opening a TCP connection to specific ports and sending traffic over that connection. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.

Weakness: CWE-476

Which versions are affected by CVE-2019-12647?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2019-12647?

No fix has been published for CVE-2019-12647 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-12647 being exploited?

There is no known exploitation of CVE-2019-12647 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-rhg8-m3m4-vcqg.