high
8.6
CWE
371
Advisory Published
Updated

CVE-2024-20455: Cisco Catalyst SD-WAN Routers Denial of Service Vulnerability

First published: Wed Sep 25 2024(Updated: )

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.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS XE Web UI=17.1.1
Cisco IOS XE Web UI=17.1.1a
Cisco IOS XE Web UI=17.1.1s
Cisco IOS XE Web UI=17.1.1t
Cisco IOS XE Web UI=17.1.3
Cisco IOS XE Web UI=17.2.1
Cisco IOS XE Web UI=17.2.1a
Cisco IOS XE Web UI=17.2.1r
Cisco IOS XE Web UI=17.2.1v
Cisco IOS XE Web UI=17.2.2
Cisco IOS XE Web UI=17.2.3
Cisco IOS XE Web UI=17.3.1
Cisco IOS XE Web UI=17.3.1a
Cisco IOS XE Web UI=17.3.1w
Cisco IOS XE Web UI=17.3.1x
Cisco IOS XE Web UI=17.3.1z
Cisco IOS XE Web UI=17.3.2
Cisco IOS XE Web UI=17.3.2a
Cisco IOS XE Web UI=17.3.3
Cisco IOS XE Web UI=17.3.4
Cisco IOS XE Web UI=17.3.4a
Cisco IOS XE Web UI=17.3.4b
Cisco IOS XE Web UI=17.3.4c
Cisco IOS XE Web UI=17.3.5
Cisco IOS XE Web UI=17.3.5a
Cisco IOS XE Web UI=17.3.5b
Cisco IOS XE Web UI=17.3.6
Cisco IOS XE Web UI=17.3.7
Cisco IOS XE Web UI=17.3.8
Cisco IOS XE Web UI=17.3.8a
Cisco IOS XE Web UI=17.4.1
Cisco IOS XE Web UI=17.4.1a
Cisco IOS XE Web UI=17.4.1b
Cisco IOS XE Web UI=17.4.2
Cisco IOS XE Web UI=17.4.2a
Cisco IOS XE Web UI=17.5.1
Cisco IOS XE Web UI=17.5.1a
Cisco IOS XE Web UI=17.6.1
Cisco IOS XE Web UI=17.6.1a
Cisco IOS XE Web UI=17.6.1w
Cisco IOS XE Web UI=17.6.1x
Cisco IOS XE Web UI=17.6.1y
Cisco IOS XE Web UI=17.6.1z
Cisco IOS XE Web UI=17.6.1z1
Cisco IOS XE Web UI=17.6.2
Cisco IOS XE Web UI=17.6.3
Cisco IOS XE Web UI=17.6.3a
Cisco IOS XE Web UI=17.6.4
Cisco IOS XE Web UI=17.6.5
Cisco IOS XE Web UI=17.6.5a
Cisco IOS XE Web UI=17.6.6
Cisco IOS XE Web UI=17.6.6a
Cisco IOS XE Web UI=17.7.1
Cisco IOS XE Web UI=17.7.1a
Cisco IOS XE Web UI=17.7.1b
Cisco IOS XE Web UI=17.7.2
Cisco IOS XE Web UI=17.8.1
Cisco IOS XE Web UI=17.8.1a
Cisco IOS XE Web UI=17.9.1
Cisco IOS XE Web UI=17.9.1a
Cisco IOS XE Web UI=17.9.1w
Cisco IOS XE Web UI=17.9.1x
Cisco IOS XE Web UI=17.9.1x1
Cisco IOS XE Web UI=17.9.1y
Cisco IOS XE Web UI=17.9.1y1
Cisco IOS XE Web UI=17.9.2
Cisco IOS XE Web UI=17.9.2a
Cisco IOS XE Web UI=17.9.3
Cisco IOS XE Web UI=17.9.3a
Cisco IOS XE Web UI=17.9.4
Cisco IOS XE Web UI=17.9.4a
Cisco IOS XE Web UI=17.9.5
Cisco IOS XE Web UI=17.9.5a
Cisco IOS XE Web UI=17.9.5b
Cisco IOS XE Web UI=17.10.1
Cisco IOS XE Web UI=17.10.1a
Cisco IOS XE Web UI=17.10.1b
Cisco IOS XE Web UI=17.11.1
Cisco IOS XE Web UI=17.11.1a
Cisco IOS XE Web UI=17.11.99sw
Cisco IOS XE Web UI=17.12.1
Cisco IOS XE Web UI=17.12.1a
Cisco IOS XE Web UI=17.12.1w
Cisco IOS XE Web UI=17.12.2
Cisco IOS XE Web UI=17.12.2a
Cisco IOS XE Web UI=17.13.1
Cisco IOS XE Web UI=17.13.1a
Cisco IOS XE sd-wan=17.5.1a
Cisco IOS XE sd-wan=17.6.1a
Cisco IOS XE sd-wan=17.6.2
Cisco IOS XE sd-wan=17.6.4
Cisco IOS XE sd-wan=17.7.1a
Cisco IOS XE sd-wan=17.8.1a
Cisco IOS XE sd-wan=17.9.1a
Cisco IOS XE sd-wan=17.9.2a
Cisco IOS XE sd-wan=17.9.3a
Cisco IOS XE sd-wan=17.9.4
Cisco IOS XE sd-wan=17.10.1a
Cisco IOS XE sd-wan=17.11.1a
Cisco IOS XE sd-wan=17.12.1a
Cisco IOS XE sd-wan=17.13.1a

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-20455?

    CVE-2024-20455 is classified as a high severity vulnerability due to its potential to allow remote attackers to cause a denial of service condition.

  • How do I fix CVE-2024-20455?

    To fix CVE-2024-20455, upgrade to the latest patched version of Cisco IOS XE Software that addresses this vulnerability.

  • What versions of Cisco IOS XE are affected by CVE-2024-20455?

    CVE-2024-20455 affects multiple versions of Cisco IOS XE, including 17.1.1, 17.1.3, 17.2.1, 17.3.1, and several others up to 17.13.1.

  • Can CVE-2024-20455 be exploited remotely?

    Yes, CVE-2024-20455 can be exploited by unauthenticated remote attackers, making it particularly critical to address.

  • What are the potential impacts of exploiting CVE-2024-20455?

    Exploiting CVE-2024-20455 could lead to a denial of service on affected devices, potentially disrupting network operations.

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