CVE-2023-20233

Description

A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device.

Categories

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.15%
Vendor Advisory cisco.com
Affected: Cisco Cisco IOS XR Software
Published at:
Updated at:

References

Link Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xr-cfm-3pWN8MKt vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-20233?
CVE-2023-20233 has been scored as a medium severity vulnerability.
How to fix CVE-2023-20233?
To fix CVE-2023-20233, 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-2023-20233 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-20233 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-20233?
CVE-2023-20233 affects Cisco Cisco IOS XR Software.
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