CVE-2024-20433 Memory corruption in Cisco IOS XE Software

High 8.6 Published 25 Sep 2024 Updated 25 Sep 2024

Unauthenticated remote attackers can cause a denial of service by sending crafted RSVP packets that trigger a buffer overflow in Cisco IOS devices.

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-2024-20433?

CVE-2024-20433 is a high-severity memory corruption vulnerability in Cisco Ios, published on 25 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Resource Reservation Protocol (RSVP) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a buffer overflow when processing crafted RSVP packets. An attacker could exploit this vulnerability by sending RSVP traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2024-20433?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2024-20433?

No fix has been published for CVE-2024-20433 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2024-20433 being exploited?

There is no known exploitation of CVE-2024-20433 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-fg4m-w584-q5x8.