CVE-2023-20233CWE-476

A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial…

Medium · published September 13, 2023

CVSS v3.1
4.3
EPSS
0%
Percentile
26.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00342 · 26.5th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2023-09-13T16:40Z
EPSS history
Timeline
  • 13 SEP 16:40Z
    A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial…
    cvelistv5