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CVE-2023-20089— Cisco Nexus 9000 Series Fabric Switches in ACI Mode Link Layer Discovery Protocol Memory Leak Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco NX-OS System Software in ACI Mode
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 9000 Series Fabric Switches是美国思科（Cisco）公司的一款9000系列光纤交换机。 Cisco Nexus 9000 Series Fabric Switches存在安全漏洞。攻击者利用该漏洞造成内存泄漏，从而导致设备意外重新加载。

CVSS 7.4 · High EPSS 0.30% · P20
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I. Basic Information for CVE-2023-20089

Vulnerability Information
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Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches in ACI Mode Link Layer Discovery Protocol Memory Leak Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) Mode could allow an unauthenticated, adjacent attacker to cause a memory leak, which could result in an unexpected reload of the device. This vulnerability is due to incorrect error checking when parsing ingress LLDP packets. An attacker could exploit this vulnerability by sending a steady stream of crafted LLDP packets to an affected device. A successful exploit could allow the attacker to cause a memory leak, which could result in a denial of service (DoS) condition when the device unexpectedly reloads. Note: This vulnerability cannot be exploited by transit traffic through the device. The crafted LLDP packet must be targeted to a directly connected interface, and the attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). In addition, the attack surface for this vulnerability can be reduced by disabling LLDP on interfaces where it is not required.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Nexus 9000 Series Fabric Switches 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Nexus 9000 Series Fabric Switches是美国思科（Cisco）公司的一款9000系列光纤交换机。 Cisco Nexus 9000 Series Fabric Switches存在安全漏洞。攻击者利用该漏洞造成内存泄漏，从而导致设备意外重新加载。
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 NX-OS System Software in ACI Mode n/a -

II. Public POCs for CVE-2023-20089

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III. Intelligence Information for CVE-2023-20089

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Vendor Advisories for CVE-2023-20089 (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-2023-20016 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-2023-20012 5.3 MEDIUM Cisco Nexus 9300-FX3 Series Fabric Extender for UCS Fabric Interconnects Authentication By
CVE-2023-20050 4.4 MEDIUM Cisco NX-OS Software CLI Command Injection Vulnerability

IV. Related Vulnerabilities

Same product: Cisco NX-OS System Software in ACI Mode
Same vendor: Cisco
Same weakness: CWE-789

V. Comments for CVE-2023-20089

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