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CVE-2024-20455

HIGHCVSS 8.6/10EPSS 0.67%

Last modified

CVE-2024-20455 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
0.67%

47.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe17.1.1
CiscoIos Xe17.1.1a
CiscoIos Xe17.1.1s
CiscoIos Xe17.1.1t
CiscoIos Xe17.1.3
CiscoIos Xe17.2.1
CiscoIos Xe17.2.1a
CiscoIos Xe17.2.1r
CiscoIos Xe17.2.1v
CiscoIos Xe17.2.2
CiscoIos Xe17.2.3
CiscoIos Xe17.3.1
CiscoIos Xe17.3.1a
CiscoIos Xe17.3.1w
CiscoIos Xe17.3.1x
CiscoIos Xe17.3.1z
CiscoIos Xe17.3.2
CiscoIos Xe17.3.2a
CiscoIos Xe17.3.3
CiscoIos Xe17.3.4
CiscoIos Xe17.3.4a
CiscoIos Xe17.3.4b
CiscoIos Xe17.3.4c
CiscoIos Xe17.3.5
CiscoIos Xe17.3.5a
CiscoIos Xe17.3.5b
CiscoIos Xe17.3.6
CiscoIos Xe17.3.7
CiscoIos Xe17.3.8
CiscoIos Xe17.3.8a
CiscoIos Xe17.4.1
CiscoIos Xe17.4.1a
CiscoIos Xe17.4.1b
CiscoIos Xe17.4.2
CiscoIos Xe17.4.2a
CiscoIos Xe17.5.1
CiscoIos Xe17.5.1a
CiscoIos Xe17.6.1
CiscoIos Xe17.6.1a
CiscoIos Xe17.6.1w
CiscoIos Xe17.6.1x
CiscoIos Xe17.6.1y
CiscoIos Xe17.6.1z
CiscoIos Xe17.6.1z1
CiscoIos Xe17.6.2
CiscoIos Xe17.6.3
CiscoIos Xe17.6.3a
CiscoIos Xe17.6.4
CiscoIos Xe17.6.5
CiscoIos Xe17.6.5a

Showing 50 of 101 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20455?
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.
How severe is CVE-2024-20455?
CVE-2024-20455 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20455?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20455?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST