CVE-2022-20756

Cisco Identity Services Engine RADIUS Service Denial of Service Vulnerability

Description

A vulnerability in the RADIUS 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 requests. An attacker could exploit this vulnerability by attempting to authenticate to a network or a service where the access server is using Cisco ISE as the RADIUS server. A successful exploit could allow the attacker to cause Cisco ISE to stop processing RADIUS requests, causing authentication/authorization timeouts, which would then result in legitimate requests being denied access. Note: To recover the ability to process RADIUS packets, a manual restart of the affected Policy Service Node (PSN) is required. See the Details section for more information.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.13% Top 25%
Vendor Advisory cisco.com
Affected: Cisco Cisco Identity Services Engine Software
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-dos-JLh9TxBp vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-20756?
CVE-2022-20756 has been scored as a high severity vulnerability.
How to fix CVE-2022-20756?
To fix CVE-2022-20756, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-20756 being actively exploited in the wild?
It is possible that CVE-2022-20756 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-20756?
CVE-2022-20756 affects Cisco Cisco Identity Services Engine Software.
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