Cisco Identity Services Engine RADIUS Message improper authentication

Summaryinfo

A vulnerability identified as critical has been detected in Cisco Identity Services Engine. This issue affects some unknown processing of the component RADIUS Message Handler. The manipulation leads to improper authentication. This vulnerability is referenced as CVE-2023-20243. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Identity Services Engine (Policy Management Software) (affected version not known) and classified as critical. This issue affects some unknown functionality of the component RADIUS Message Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is availability. The summary by CVE is:

A vulnerability in the RADIUS message processing feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause the affected system to stop processing RADIUS packets. This vulnerability is due to improper handling of certain RADIUS accounting requests. An attacker could exploit this vulnerability by sending a crafted authentication request to a network access device (NAD) that uses Cisco ISE for authentication, authorization, and accounting (AAA). This would eventually result in the NAD sending a RADIUS accounting request packet to Cisco ISE. An attacker could also exploit this vulnerability by sending a crafted RADIUS accounting request packet to Cisco ISE directly if the RADIUS shared secret is known. A successful exploit could allow the attacker to cause the RADIUS process to unexpectedly restart, resulting in authentication or authorization timeouts and denying legitimate users access to the network or service. Clients already authenticated to the network would not be affected. Note: To recover the ability to process RADIUS packets, a manual restart of the affected Policy Service Node (PSN) may be required. For more information, see the Details ["#details"] section of this advisory.

The weakness was published 09/07/2023 as cisco-sa-ise-radius-dos-W7cNn7gt. The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2023-20243 since 10/27/2022. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Policy Management Software

Vendor

• Cisco

Name

• Identity Services Engine

License

• commercial

Website

• Vendor: https://www.cisco.com/

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