Cisco IOS XE Control/Provisioning Packet input validation

Summaryinfo

A vulnerability classified as problematic has been found in Cisco IOS XE. This affects an unknown function of the component Control/Provisioning. Performing a manipulation as part of Packet results in input validation. This vulnerability is known as CVE-2020-3494. Access to the local network is required for this attack. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS XE (Router Operating System) (version now known). This affects some unknown processing 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. The summary by CVE is:

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 published 09/24/2020 as cisco-sa-capwap-dos-TPdNTdyq as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2020-3494 since 12/12/2019. Access to the local network is required for this attack to succeed. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

Similar entries are available at VDB-161889, VDB-161890, VDB-161891 and VDB-161892. Be aware that VulDB is the high quality 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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CPE 2.2info

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Entryinfo

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