CVE-2024-20455

Description

A vulnerability in the process that classifies traffic that is going to the Unified Threat Defense (UTD) component of Cisco IOS XE Software in controller mode could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because UTD improperly handles certain packets as those packets egress an SD-WAN IPsec tunnel. An attacker could exploit this vulnerability by sending crafted traffic through an SD-WAN IPsec tunnel that is configured on an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: SD-WAN tunnels that are configured with Generic Routing Encapsulation (GRE) are not affected by this vulnerability.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.31%
Vendor Advisory cisco.com
Affected: Cisco Cisco IOS XE Software
Affected: Cisco Cisco IOS XE Catalyst SD-WAN
Published at:
Updated at:

References

Link Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-utd-dos-hDATqxs vendor advisory

Frequently Asked Questions

What is the severity of CVE-2024-20455?
CVE-2024-20455 has been scored as a high severity vulnerability.
How to fix CVE-2024-20455?
To fix CVE-2024-20455, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-20455 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-20455 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-20455?
CVE-2024-20455 affects Cisco Cisco IOS XE Software, Cisco Cisco IOS XE Catalyst SD-WAN.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.