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CVE-2022-20915— Cisco IOS XE Software IPv6 VPN over MPLS Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XE 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 IOS XE Software是美国思科（Cisco）公司的一个操作系统。用于企业有线和无线访问，汇聚，核心和WAN的单一操作系统，Cisco IOS XE降低了业务和网络的复杂性。 Cisco IOS XE Software IPv6 VPN存在安全漏洞。攻击者利用该漏洞可以重新加载设备，从而导致拒绝服务情况。

CVSS 7.4 · High EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-20915

Vulnerability Information
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Vulnerability Title
Cisco IOS XE Software IPv6 VPN over MPLS Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the implementation of IPv6 VPN over MPLS (6VPE) with Zone-Based Firewall (ZBFW) of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling of an IPv6 packet that is forwarded from an MPLS and ZBFW-enabled interface in a 6VPE deployment. An attacker could exploit this vulnerability by sending a crafted IPv6 packet sourced from a device on the IPv6-enabled virtual routing and forwarding (VRF) interface through the affected device. A successful exploit could allow the attacker to reload the device, resulting in a DoS condition.
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
输入的错误解释
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XE Software 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XE Software是美国思科（Cisco）公司的一个操作系统。用于企业有线和无线访问，汇聚，核心和WAN的单一操作系统，Cisco IOS XE降低了业务和网络的复杂性。 Cisco IOS XE Software IPv6 VPN存在安全漏洞。攻击者利用该漏洞可以重新加载设备，从而导致拒绝服务情况。
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 IOS XE Software n/a -

II. Public POCs for CVE-2022-20915

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III. Intelligence Information for CVE-2022-20915

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Vendor Advisories for CVE-2022-20915 (1)

Same Patch Batch · Cisco · 2022-10-10 · 7 CVEs total

CVE-2022-20837 8.6 HIGH Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnera
CVE-2022-20870 8.6 HIGH Cisco IOS XE Software for Catalyst Switches MPLS Denial of Service Vulnerability
CVE-2022-20920 7.7 HIGH Cisco IOS and IOS XE Software SSH Denial of Service Vulnerability
CVE-2022-20944 6.1 MEDIUM Cisco IOS XE Software for Catalyst 9200 Series Switches Arbitrary Code Execution Vulnerabi
CVE-2022-20830 5.3 MEDIUM Cisco Software-Defined Application Visibility and Control on Cisco vManage Authentication
CVE-2022-20864 4.6 MEDIUM Cisco IOS XE ROM Monitor Software for Catalyst Switches Information Disclosure Vulnerabili

IV. Related Vulnerabilities

Same product: Cisco IOS XE Software
Same vendor: Cisco
Same weakness: CWE-115

V. Comments for CVE-2022-20915

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