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CVE-2023-20012— Cisco Nexus 9300-FX3 Series Fabric Extender for UCS Fabric Interconnects Authentication Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco Unified Computing System (Managed)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Nexus 9300-FX3 Series是美国思科（Cisco）公司的一系列交换机。 Cisco Nexus 9300-FX3 Series Fabric Extender (FEX) 存在安全漏洞，该漏洞源于密码验证功能实现不当。攻击者利用该漏洞绕过身份验证，导致设备重启和拒绝服务情况。

CVSS 5.3 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2023-20012

Vulnerability Information
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Vulnerability Title
Cisco Nexus 9300-FX3 Series Fabric Extender for UCS Fabric Interconnects Authentication Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Nexus 9300-FX3 Series 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Nexus 9300-FX3 Series是美国思科（Cisco）公司的一系列交换机。 Cisco Nexus 9300-FX3 Series Fabric Extender (FEX) 存在安全漏洞，该漏洞源于密码验证功能实现不当。攻击者利用该漏洞绕过身份验证，导致设备重启和拒绝服务情况。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Unified Computing System (Managed) n/a -

II. Public POCs for CVE-2023-20012

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III. Intelligence Information for CVE-2023-20012

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Vendor Advisories for CVE-2023-20012 (1)

Same Patch Batch · Cisco · 2023-02-23 · 6 CVEs total

CVE-2023-20011 8.8 HIGH Cisco Application Policy Infrastructure Controller and Cisco Cloud Network Controller Cros
CVE-2023-20089 7.4 HIGH Cisco Nexus 9000 Series Fabric Switches in ACI Mode Link Layer Discovery Protocol Memory L
CVE-2023-20016 6.3 MEDIUM Cisco FXOS Software and UCS Manager Software Configuration Backup Static Key Vulnerability
CVE-2023-20015 6.0 MEDIUM Cisco Firepower 4100 Series, Firepower 9300 Security Appliances, and UCS Fabric Interconne
CVE-2023-20050 4.4 MEDIUM Cisco NX-OS Software CLI Command Injection Vulnerability

IV. Related Vulnerabilities

Same product: Cisco Unified Computing System (Managed)
Same vendor: Cisco
Same weakness: CWE-287

V. Comments for CVE-2023-20012

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