Cisco IOS XE Control/Provisioning Packet input validation

Summaryinfo

A vulnerability labeled as problematic has been found in Cisco IOS XE. Impacted is an unknown function of the component Control/Provisioning. The manipulation as part of Packet results in input validation. This vulnerability is reported as CVE-2020-3489. The attacker must have access to the local network to execute the attack. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco IOS XE (Router Operating System) (the affected version unknown). Affected is an unknown part of the component Control/Provisioning. The manipulation as part of a Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

Multiple vulnerabilities in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition of an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. An attacker could exploit these vulnerabilities by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition on the affected device.

The weakness was disclosed 09/24/2020 as cisco-sa-capwap-dos-TPdNTdyq as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2020-3489 since 12/12/2019. The attack needs to be done within the local network. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

The entries VDB-161889, VDB-161890, VDB-161891 and VDB-161894 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Once again VulDB remains the best source for vulnerability data.

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