Vulnerability Details : CVE-2023-20233

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.
Published 2023-09-13 17:15:10
Updated 2024-01-25 17:15:39
Source Cisco Systems, Inc.
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2023-20233

Exploit prediction scoring system (EPSS) score for CVE-2023-20233

EPSS FAQ
0.11%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 46 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-20233

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.5
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
2.8
3.6
 NIST
4.3
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
2.8
1.4
 Cisco Systems, Inc.

CWE ids for CVE-2023-20233

  • The product does not validate or incorrectly validates the integrity check values or "checksums" of a message. This may prevent it from detecting if the data has been modified or corrupted in transmission.
    Assigned by: nvd@nist.gov (Primary)
  • The product dereferences a pointer that it expects to be valid but is NULL.
    Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2023-20233

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