CVEvulnerability

CVE-2023-20233

6.5 MEDIUM Published 2023-09-13 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-09-13
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses
CWE-354, CWE-476

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.

Affected configurations

• cisco ios xr (< 7.5.4) • cisco ios xr (>= 7.6 < 7.6.3) • cisco ios xr (>= 7.7 < 7.7.21) • cisco ios xr (>= 7.8 < 7.8.2) • cisco ios xr 7.9.0

Related

Weakness · CWE (2)

  • CWE-354 Improper Validation of Integrity Check Value weakness
  • CWE-476 NULL Pointer Dereference weakness

References