A vulnerability, which was classified as problematic, was found in Cisco IOS XE (Router Operating System) (affected version unknown). Affected is an unknown functionality of the component Web Server Authentication. The manipulation with an unknown input 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:

A vulnerability in the web server authentication of Cisco IOS XE Software could allow an authenticated, remote attacker to crash the web server on the device. The vulnerability is due to insufficient input validation during authentication. An attacker could exploit this vulnerability by entering unexpected characters during a valid authentication. A successful exploit could allow the attacker to crash the web server on the device, which must be manually recovered by disabling and re-enabling the web server.

The weakness was shared 09/24/2020 as cisco-sa-WEB-UI-exNFmcPO as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2020-3516 since 12/12/2019. It is possible to launch the attack remotely. The successful exploitation needs a authentication. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

The entries 161906, 161905, 161903 and 161900 are related to this item.

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Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE

License

• commercial

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• 🔍

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