Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-1231

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/02/2021
Last modified:
07/11/2023

Description

A vulnerability in the Link Layer Discovery Protocol (LLDP) for Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, adjacent attacker to disable switching on a small form-factor pluggable (SFP) interface. This vulnerability is due to incomplete validation of the source of a received LLDP packet. An attacker could exploit this vulnerability by sending a crafted LLDP packet on an SFP interface to an affected device. A successful exploit could allow the attacker to disable switching on the SFP interface, which could disrupt network traffic.

Impact

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

Base Score: 4.70 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

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

Base Score 3.x
4.70
Severity 3.x
MEDIUM
Vector 2.0
AV:A/AC:M/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 2.90 LOW
Vector: AV:A/AC:M/Au:N/C:N/I:N/A:P

Attack Vector (AV): Adjacent
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
2.90
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:nx-os:11.0\(1b\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(1c\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(1d\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(1e\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(2j\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(2m\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(3f\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(3i\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(3k\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(3n\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(3o\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(4g\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(4h\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(4o\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:11.0\(4q\):*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools