Cisco IOS XE UTD SD-WAN DoS Vulnerability
CVE-2024-20455 Published on September 25, 2024
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.
Vulnerability Analysis
CVE-2024-20455 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
State Issues
Weaknesses in this category are related to improper management of system state.
Products Associated with CVE-2024-20455
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Affected Versions
Cisco IOS XE Software:- Version 17.1.1 is affected.
- Version 17.1.1a is affected.
- Version 17.1.1s is affected.
- Version 17.1.1t is affected.
- Version 17.1.3 is affected.
- Version 17.2.1 is affected.
- Version 17.2.1r is affected.
- Version 17.2.1a is affected.
- Version 17.2.1v is affected.
- Version 17.2.2 is affected.
- Version 17.2.3 is affected.
- Version 17.3.1 is affected.
- Version 17.3.2 is affected.
- Version 17.3.3 is affected.
- Version 17.3.1a is affected.
- Version 17.3.1w is affected.
- Version 17.3.2a is affected.
- Version 17.3.1x is affected.
- Version 17.3.1z is affected.
- Version 17.3.4 is affected.
- Version 17.3.5 is affected.
- Version 17.3.4a is affected.
- Version 17.3.6 is affected.
- Version 17.3.4b is affected.
- Version 17.3.4c is affected.
- Version 17.3.5a is affected.
- Version 17.3.5b is affected.
- Version 17.3.7 is affected.
- Version 17.3.8 is affected.
- Version 17.3.8a is affected.
- Version 17.4.1 is affected.
- Version 17.4.2 is affected.
- Version 17.4.1a is affected.
- Version 17.4.1b is affected.
- Version 17.4.2a is affected.
- Version 17.5.1 is affected.
- Version 17.5.1a is affected.
- Version 17.6.1 is affected.
- Version 17.6.2 is affected.
- Version 17.6.1w is affected.
- Version 17.6.1a is affected.
- Version 17.6.1x is affected.
- Version 17.6.3 is affected.
- Version 17.6.1y is affected.
- Version 17.6.1z is affected.
- Version 17.6.3a is affected.
- Version 17.6.4 is affected.
- Version 17.6.1z1 is affected.
- Version 17.6.5 is affected.
- Version 17.6.6 is affected.
- Version 17.6.6a is affected.
- Version 17.6.5a is affected.
- Version 17.7.1 is affected.
- Version 17.7.1a is affected.
- Version 17.7.1b is affected.
- Version 17.7.2 is affected.
- Version 17.10.1 is affected.
- Version 17.10.1a is affected.
- Version 17.10.1b is affected.
- Version 17.8.1 is affected.
- Version 17.8.1a is affected.
- Version 17.9.1 is affected.
- Version 17.9.1w is affected.
- Version 17.9.2 is affected.
- Version 17.9.1a is affected.
- Version 17.9.1x is affected.
- Version 17.9.1y is affected.
- Version 17.9.3 is affected.
- Version 17.9.2a is affected.
- Version 17.9.1x1 is affected.
- Version 17.9.3a is affected.
- Version 17.9.4 is affected.
- Version 17.9.1y1 is affected.
- Version 17.9.5 is affected.
- Version 17.9.4a is affected.
- Version 17.9.5a is affected.
- Version 17.9.5b is affected.
- Version 17.11.1 is affected.
- Version 17.11.1a is affected.
- Version 17.12.1 is affected.
- Version 17.12.1w is affected.
- Version 17.12.1a is affected.
- Version 17.12.2 is affected.
- Version 17.12.2a is affected.
- Version 17.13.1 is affected.
- Version 17.13.1a is affected.
- Version 17.11.99SW is affected.
- Version 17.5.1a is affected.
- Version 17.6.1a is affected.
- Version 17.6.2 is affected.
- Version 17.6.4 is affected.
- Version 17.7.1a is affected.
- Version 17.9.1a is affected.
- Version 17.9.2a is affected.
- Version 17.9.3a is affected.
- Version 17.9.4 is affected.
- Version 17.8.1a is affected.
- Version 17.10.1a is affected.
- Version 17.11.1a is affected.
- Version 17.12.1a is affected.
- Version 17.13.1a is affected.
- Version 17.1.1 is affected.
- Version 17.1.1a is affected.
- Version 17.1.1s is affected.
- Version 17.1.1t is affected.
- Version 17.1.3 is affected.
- Version 17.2.1 is affected.
- Version 17.2.1r is affected.
- Version 17.2.1a is affected.
- Version 17.2.1v is affected.
- Version 17.2.2 is affected.
- Version 17.2.3 is affected.
- Version 17.3.1 is affected.
- Version 17.3.2 is affected.
- Version 17.3.3 is affected.
- Version 17.3.1a is affected.
- Version 17.3.1w is affected.
- Version 17.3.2a is affected.
- Version 17.3.1x is affected.
- Version 17.3.1z is affected.
- Version 17.3.4 is affected.
- Version 17.3.5 is affected.
- Version 17.3.4a is affected.
- Version 17.3.6 is affected.
- Version 17.3.4b is affected.
- Version 17.3.4c is affected.
- Version 17.3.5a is affected.
- Version 17.3.5b is affected.
- Version 17.3.7 is affected.
- Version 17.3.8 is affected.
- Version 17.3.8a is affected.
- Version 17.4.1 is affected.
- Version 17.4.2 is affected.
- Version 17.4.1a is affected.
- Version 17.4.1b is affected.
- Version 17.4.2a is affected.
- Version 17.5.1 is affected.
- Version 17.5.1a is affected.
- Version 17.6.1 is affected.
- Version 17.6.2 is affected.
- Version 17.6.1w is affected.
- Version 17.6.1a is affected.
- Version 17.6.1x is affected.
- Version 17.6.3 is affected.
- Version 17.6.1y is affected.
- Version 17.6.1z is affected.
- Version 17.6.3a is affected.
- Version 17.6.4 is affected.
- Version 17.6.1z1 is affected.
- Version 17.6.5 is affected.
- Version 17.6.6 is affected.
- Version 17.6.6a is affected.
- Version 17.6.5a is affected.
- Version 17.7.1 is affected.
- Version 17.7.1a is affected.
- Version 17.7.1b is affected.
- Version 17.7.2 is affected.
- Version 17.10.1 is affected.
- Version 17.10.1a is affected.
- Version 17.10.1b is affected.
- Version 17.8.1 is affected.
- Version 17.8.1a is affected.
- Version 17.9.1 is affected.
- Version 17.9.1w is affected.
- Version 17.9.2 is affected.
- Version 17.9.1a is affected.
- Version 17.9.1x is affected.
- Version 17.9.1y is affected.
- Version 17.9.3 is affected.
- Version 17.9.2a is affected.
- Version 17.9.1x1 is affected.
- Version 17.9.3a is affected.
- Version 17.9.4 is affected.
- Version 17.9.1y1 is affected.
- Version 17.9.5 is affected.
- Version 17.9.4a is affected.
- Version 17.9.5a is affected.
- Version 17.9.5b is affected.
- Version 17.11.1 is affected.
- Version 17.11.1a is affected.
- Version 17.12.1 is affected.
- Version 17.12.1w is affected.
- Version 17.12.1a is affected.
- Version 17.12.2 is affected.
- Version 17.12.2a is affected.
- Version 17.13.1 is affected.
- Version 17.13.1a is affected.
- Version 17.11.99sw is affected.
- Version 17.5.1a is affected.
- Version 17.6.1a is affected.
- Version 17.6.2 is affected.
- Version 17.6.4 is affected.
- Version 17.7.1a is affected.
- Version 17.9.1a is affected.
- Version 17.9.2a is affected.
- Version 17.9.3a is affected.
- Version 17.9.4 is affected.
- Version 17.8.1a is affected.
- Version 17.10.1a is affected.
- Version 17.11.1a is affected.
- Version 17.12.1a is affected.
- Version 17.13.1a is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.