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

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CVE-2022-20623

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/02/2022
Last modified:
07/11/2023

Description

A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error in the BFD rate limiter functionality. An attacker could exploit this vulnerability by sending a crafted stream of traffic through the device. A successful exploit could allow the attacker to cause BFD traffic to be dropped, resulting in BFD session flaps. BFD session flaps can cause route instability and dropped traffic, resulting in a denial of service (DoS) condition. This vulnerability applies to both IPv4 and IPv6 traffic.

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:h:cisco:n9k-c92160yc-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c92300yc:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c92304qc:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c9232c:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c92348gc-x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c9236c:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c9272q:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93108tc-ex:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93108tc-fx:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c9316d-gx:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93180lc-ex:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93180yc-ex:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93180yc-fx:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93180yc2-fx:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:n9k-c93216tc-fx2:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools