CVE-2020-3118— Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
Quick assessment
Affected
Cisco Cisco IOS XR Software
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR中的Cisco Discovery Protocol实现存在缓冲区错误漏洞，该漏洞源于程序没有正确验证输入的字符串。攻击者可通过发送恶意的Cisco Discovery Protocol数据包利用该漏洞以管理权限执行任意代码。
In-the-Wild Activity Observed
cisa_kev · confirmed
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-3118
Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in 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 cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. 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
使用外部控制的格式字符串
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR中的Cisco Discovery Protocol实现存在缓冲区错误漏洞，该漏洞源于程序没有正确验证输入的字符串。攻击者可通过发送恶意的Cisco Discovery Protocol数据包利用该漏洞以管理权限执行任意代码。
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)
Shenlong Deep Dive — AI Deep Analysis
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Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco IOS XR Software | unspecified ~ 6.6.3 | - |
|
II. Public POCs for CVE-2020-3118
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-3118 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce vendor-advisory x_refsource_CISCO
Exploits & Public PoCs for CVE-2020-3118 (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-2020-3119 | Cisco NX-OS Software Cisco Discovery Protocol Remote Code Execution Vulnerability | |
| CVE-2020-3149 | Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerability | |
| CVE-2020-3120 | Cisco FXOS, IOS XR, and NX-OS Software Cisco Discovery Protocol Denial of Service Vulnerab |
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V. Comments for CVE-2020-3118
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