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CVE-2020-3120— Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR Software
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 NX-OS Software等都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco FXOS Software是一套运行在思科安全设备中的防火墙软件。Cisco IOS XR是一套为其网络设备开发的操作系统。 Cisco FXOS Software、Cisco IOS XR Software和Cisco NX-OS Software中Cisco Discovery Protocol的实现存在输入验证错误漏洞，该漏洞源

AI Predicted 6.5 Difficulty: Easy EPSS 1.64% · P76
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I. Basic Information for CVE-2020-3120

Vulnerability Information
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Vulnerability Title
Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco FXOS Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to a missing check when the affected software processes Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to exhaust system memory, causing the device to reload. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
多款Cisco产品输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software等都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco FXOS Software是一套运行在思科安全设备中的防火墙软件。Cisco IOS XR是一套为其网络设备开发的操作系统。 Cisco FXOS Software、Cisco IOS XR Software和Cisco NX-OS Software中Cisco Discovery Protocol的实现存在输入验证错误漏洞，该漏洞源
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 IOS XR Software unspecified ~ 2.3.1.173 -

II. Public POCs for CVE-2020-3120

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III. Intelligence Information for CVE-2020-3120

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Vendor Advisories for CVE-2020-3120 (1)

Exploits & Public PoCs for CVE-2020-3120 (1)

Same Patch Batch · Cisco · 2020-02-05 · 8 CVEs total

CVE-2020-3123 7.5 HIGH Clam AntiVirus 缓冲区错误漏洞
CVE-2019-15253 Cisco Digital Network Architecture Center Stored Cross-Site Scripting Vulnerability
CVE-2020-3110 Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Remote Code Execu
CVE-2020-3111 Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability
CVE-2020-3118 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
CVE-2020-3119 Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution Vulnerability
CVE-2020-3149 Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerability

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-190

V. Comments for CVE-2020-3120

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