CVE-2019-1741 Cisco IOS XE Software Encrypted Traffic Analytics 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 XE devices by sending malformed packets to the Encrypted Traffic Analytics feature.

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-2019-1741?

CVE-2019-1741 is a high-severity use after free vulnerability in Cisco Ios Xe, 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 Cisco Encrypted Traffic Analytics (ETA) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.

Weakness: CWE-416, CWE-20

Which versions are affected by CVE-2019-1741?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2019-1741?

No fix has been published for CVE-2019-1741 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-1741 being exploited?

There is no known exploitation of CVE-2019-1741 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-p3fr-r42j-9w52.