Vulnerability in Cisco iOS Xe Catalyst Sd-Wan
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.
EPSS: 0.007 (49.3th 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 Catalyst Sd-wan — versions 17.5.1a, 17.6.1a, 17.6.2
- Cisco Ios Xe Software — versions 17.1.1, 17.1.1a, 17.1.1s
- Cisco Ios_xe — versions 17.1.1, 17.1.1a, 17.1.1s
- Cisco Ios_xe_sd-wan — versions 17.5.1a, 17.6.1a, 17.6.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-20455?
- CVE-2024-20455 is a high-severity vulnerability in Cisco iOS Xe Catalyst Sd-Wan, classified under CWE-371. CVSS score: 8.6/10. Published 2024-09-25.
- How severe is CVE-2024-20455?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2024-20455 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.