CVE-2023-20012: Cisco Nexus 9300-FX3 Series Fabric Extender for UCS Fabric Interconnects Authentication Bypass Vulnerability
First published: Thu Feb 23 2023(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Nexus 93180yc-fx3s Firmware | ||
| Cisco Nexus 93180yc-fx3s | ||
| Cisco Nexus 93180yc-fx3 Firmware | ||
| Cisco Nexus 93180yc-fx3 | ||
| Cisco Ucs Central Software | >=4.2<4.2\(2d\) | |
| Cisco Ucs 6536 Firmware | ||
| Cisco Ucs 6536 | ||
| Cisco Ucs 64108 Firmware | ||
| Cisco Ucs 64108 | ||
| Cisco Ucs 6454 Firmware | ||
| Cisco Ucs 6454 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2023-20012.
What is the severity level of CVE-2023-20012?
The severity level of CVE-2023-20012 is medium with a severity value of 4.6.
What software is affected by CVE-2023-20012?
Cisco Nexus 9300-FX3 Series Fabric Extender (FEX) when used in UCS Fabric Interconnect deployments is affected by CVE-2023-20012.
How can an attacker exploit CVE-2023-20012?
An unauthenticated attacker with physical access could bypass authentication using the vulnerability in the CLI console login authentication of Cisco Nexus 9300-FX3 Series Fabric Extender (FEX) when used in UCS Fabric Interconnect deployments.
Where can I find more information about CVE-2023-20012?
You can find more information about CVE-2023-20012 at the following link: [Cisco Security Advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-elyfex-dos-gfvcByx).
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- canonical/cisco nexus 93180yc-fx3s firmware
- canonical/cisco nexus 93180yc-fx3s
- canonical/cisco nexus 93180yc-fx3 firmware
- canonical/cisco nexus 93180yc-fx3
- canonical/cisco ucs central software
- version/cisco ucs central software/4.2
- canonical/cisco ucs 6536 firmware
- canonical/cisco ucs 6536
- canonical/cisco ucs 64108 firmware
- canonical/cisco ucs 64108
- canonical/cisco ucs 6454 firmware
- canonical/cisco ucs 6454