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

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CVE-2021-1230

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

Description

A vulnerability with the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a routing process to crash, which could lead to a denial of service (DoS) condition. This vulnerability is due to an issue with the installation of routes upon receipt of a BGP update. An attacker could exploit this vulnerability by sending a crafted BGP update to an affected device. A successful exploit could allow the attacker to cause the routing process to crash, which could cause the device to reload. This vulnerability applies to both Internal BGP (IBGP) and External BGP (EBGP). Note: The Cisco implementation of BGP accepts incoming BGP traffic from explicitly configured peers only. To exploit this vulnerability, an attacker would need to send a specific BGP update message over an established TCP connection that appears to come from a trusted BGP peer.

Impact

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

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

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

Base Score 2.0
7.10
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:nx-os:12.0\(1m\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(1n\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(1o\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(1p\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(1q\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(1r\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2f\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2g\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2h\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2l\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2m\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2n\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.0\(2o\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.1\(1h\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:nx-os:12.1\(1i\):*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools