Cisco Nexus 9000 Series Fabric Switches ACI Mode Link Layer Discovery Protocol Port Denial of Service Vulnerability (Cisco Cisco NX-OS System Software in ACI Mode)

CVE-2021-1231
MEDIUM 4.7

At a glance

Source
NVD
EPSS
EPSS 0.25 % · percentile 17 ()
State
PUBLISHED
Published
Updated
Assigner
cisco
NVD status
Modified

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.

Weaknesses (CWE)

  • CWE-284 — Improper Access Control
  • CWE-346 — Origin Validation Error

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lcisco
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:LNVD · psirt@cisco.com (Secondary)
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:LNVD · nvd@nist.gov (Primary)
CVSS 2.0LOW 2.9AV:A/AC:M/Au:N/C:N/I:N/A:PNVD · nvd@nist.gov (Primary)

European references

Affected configurations (NVD CPE)

Affected products

ProductVersions
Cisco · Cisco NX-OS System Software in ACI Modeaffected n/a

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD