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CVE-2023-20012

Cisco Nexus 9300-FX3 Series Fabric Extender for UCS Fabric Interconnects Authentication Bypass Vulnerability

Published: Feb 23, 2023Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-287
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 79.1%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

A vulnerability in the CLI console login authentication of Cisco Nexus 9300-FX3 Series Fabric Extender (FEX) when used in UCS Fabric Interconnect deployments could allow an unauthenticated attacker with physical access to bypass authentication. This vulnerability is due to the improper implementation of the password validation function. An attacker could exploit this vulnerability by logging in to the console port on an affected device. A successful exploit could allow the attacker to bypass authentication and execute a limited set of commands local to the FEX, which could cause a device reboot and denial of service (DoS) condition.

CVSS Vector Breakdown

AV:PAC:LPR:NUI:NS:CC:NI:NA:H
Exploitability
AV:PAttack Vector
Physical
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-287

Affected Products

Unified Computing System ManagerCisco Systems Inc.Networking Infrastructure
nexus 93180yc-fx3s firmwareciscoNetworking Infrastructure
nexus 93180yc-fx3 firmwareciscoNetworking Infrastructure
ucs central softwareciscoNetworking Infrastructure
ucs 6536 firmwareciscoNetworking Infrastructure
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-elyfex-dos-gfvcByx
sec.cloudapps.cisco.com
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/release/notes/cisco-ucs-manager-rn-4-2.html
cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-elyfex-dos-gfvcByx
sec.cloudapps.cisco.com

Timeline

Published
Feb 23, 2023
Last Updated
Nov 21, 2024

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