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CVE-2020-3220— Cisco IOS XE Software IPsec VPN Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XE Software 16.4.1
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 IOS XE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 4300 Series Integrated Services Routers和Cisco Catalyst 9800-L Wireless Controllers中的Cisco IOS XE IPsec VPN存在数据伪造问题漏洞，该漏洞源于程序未验证接收ESP数据包的真实性。远程攻击者可通过篡改ESP明文值利用该漏洞断开与设备的IPsec VPN会话。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.53% · P43
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I. Basic Information for CVE-2020-3220

Vulnerability Information
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Vulnerability Title
Cisco IOS XE Software IPsec VPN Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the hardware crypto driver of Cisco IOS XE Software for Cisco 4300 Series Integrated Services Routers and Cisco Catalyst 9800-L Wireless Controllers could allow an unauthenticated, remote attacker to disconnect legitimate IPsec VPN sessions to an affected device. The vulnerability is due to insufficient verification of authenticity of received Encapsulating Security Payload (ESP) packets. An attacker could exploit this vulnerability by tampering with ESP cleartext values as a man-in-the-middle.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco 4300 Series Integrated Services Routers和Cisco Catalyst 9800-L Wireless Controllers IOS XE 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XE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 4300 Series Integrated Services Routers和Cisco Catalyst 9800-L Wireless Controllers中的Cisco IOS XE IPsec VPN存在数据伪造问题漏洞，该漏洞源于程序未验证接收ESP数据包的真实性。远程攻击者可通过篡改ESP明文值利用该漏洞断开与设备的IPsec VPN会话。
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 XE Software 16.4.1 n/a -

II. Public POCs for CVE-2020-3220

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III. Intelligence Information for CVE-2020-3220

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Vendor Advisories for CVE-2020-3220 (1)

Same Patch Batch · Cisco · 2020-06-03 · 50 CVEs total

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CVE-2020-3333 Cisco Application Services Engine Software Unauthenticated Event Policies Update Vulnerabi
CVE-2020-3257 Cisco IOx Application Environment for IOS Software for Cisco Industrial Routers Vulnerabil
CVE-2020-3267 Cisco Unified Contact Center Express Improper API Authorization Vulnerability
CVE-2020-3258 Cisco IOS Software for Cisco Industrial Routers Arbitrary Code Execution Vulnerabilities
CVE-2020-3281 Cisco Digital Network Architecture Center Information Disclosure Vulnerability
CVE-2020-3232 Cisco ASR 920 Series Aggregation Services Router Model 12SZ-IM SNMP Denial of Service Vuln
CVE-2020-3200 Cisco IOS and IOS XE Software Secure Shell Denial of Service Vulnerability
CVE-2020-3199 Cisco IOx Application Environment for IOS Software for Cisco Industrial Routers Vulnerabil
CVE-2020-3198 Cisco IOS Software for Cisco Industrial Routers Arbitrary Code Execution Vulnerabilities
CVE-2020-3228 Cisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Servi
CVE-2020-3231 Cisco IOS Software for Catalyst 2960-L Series Switches and Catalyst CDB-8P Switches 802.1X
CVE-2020-3230 Cisco IOS and IOS XE Software Internet Key Exchange Version 2 Denial of Service Vulnerabil
CVE-2020-3229 Cisco IOS XE Software Web UI Privilege Escalation Vulnerability
CVE-2020-3227 Cisco IOx for IOS XE Software Privilege Escalation Vulnerability
CVE-2020-3225 Cisco IOS and IOS XE Software Common Industrial Protocol Denial of Service Vulnerabilities
CVE-2020-3233 Cisco IOx Application Framework Local Manager Stored Cross-Site Scripting Vulnerability

Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco IOS XE Software 16.4.1
Same vendor: Cisco
Same weakness: CWE-345

V. Comments for CVE-2020-3220

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