Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2023-20233

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
13/09/2023
Last modified:
25/01/2024

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.<br /> <br /> 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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
6.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* 7.5.4 (excluding)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* 7.6 (including) 7.6.3 (excluding)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* 7.7 (including) 7.7.21 (excluding)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* 7.8 (including) 7.8.2 (excluding)
cpe:2.3:o:cisco:ios_xr:7.9.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools