What is CVE-2024-20433?

CVE-2024-20433 is a high-severity vulnerability in Cisco iOS Xe Software, classified under Stack-based Buffer Overflow. CVSS score: 8.6/10. Published 2024-09-25.

How severe is CVE-2024-20433?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2024-20433 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Cisco iOS Xe Software

CVE-2024-20433

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.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (46.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Ios Xe Software — versions 3.7.0S, 3.7.1S, 3.7.2S
Cisco Ios — versions 12.2(20)S8, 12.2\(18\)so2, 12.3(11)YF2
Cisco Ios_xe — versions 3.3.0sg, 3.3.1sg, 3.3.2sg

Weakness classification (CWE)

Public proof-of-concept exploits

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2024-20433?: CVE-2024-20433 is a high-severity vulnerability in Cisco iOS Xe Software, classified under Stack-based Buffer Overflow. CVSS score: 8.6/10. Published 2024-09-25.
How severe is CVE-2024-20433?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2024-20433 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.