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CVE-2022-20847— Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family DHCP Processing 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和 Cisco Catalyst 9000都是美国思科（Cisco）公司的产品。Cisco IOS XE Software是一个操作系统。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 Catalyst 9000是一个交换机。 Cisco IOS XE Catalyst 9000存在资源管理错误漏洞，该漏洞源于处理DHCP消息不当。远程攻击者利用该漏洞执行拒绝服务（DoS）攻击。

CVSS 8.6 · High EPSS 1.25% · P69
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I. Basic Information for CVE-2022-20847

Vulnerability Information
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Vulnerability Title
Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family DHCP Processing Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the DHCP processing functionality of Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the improper processing of DHCP messages. An attacker could exploit this vulnerability by sending malicious DHCP messages to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
资源管理错误
Source: CVE Program / CVE List V5
Vulnerability Title
多款Cisco产品 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XE Software和 Cisco Catalyst 9000都是美国思科（Cisco）公司的产品。Cisco IOS XE Software是一个操作系统。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 Catalyst 9000是一个交换机。 Cisco IOS XE Catalyst 9000存在资源管理错误漏洞，该漏洞源于处理DHCP消息不当。远程攻击者利用该漏洞执行拒绝服务（DoS）攻击。
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-2022-20847

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III. Intelligence Information for CVE-2022-20847

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Vendor Advisories for CVE-2022-20847 (1)

Same Patch Batch · Cisco · 2022-09-30 · 16 CVEs total

CVE-2022-20919 8.6 HIGH Cisco IOS and IOS XE Software Common Industrial Protocol Request Denial of Service Vulnera
CVE-2022-20856 8.6 HIGH Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Mobility Den
CVE-2022-20848 8.6 HIGH Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Poi
CVE-2022-20855 7.9 HIGH Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst Access Points Privileg
CVE-2022-20818 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerabilities
CVE-2022-20775 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2022-20945 7.4 HIGH Cisco Catalyst 9100 Series Access Points Association Request Denial of Service Vulnerabili
CVE-2022-20769 7.4 HIGH Cisco Wireless LAN Controller AireOS Software FIPS Mode Denial of Service Vulnerability
CVE-2022-20930 6.7 MEDIUM Cisco SD-WAN Software Arbitrary File Corruption Vulnerability
CVE-2022-20810 6.5 MEDIUM Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family SNMP Information Di
CVE-2022-20662 6.1 MEDIUM Cisco Duo for macOS Authentication Bypass Vulnerability
CVE-2022-20851 5.5 MEDIUM Cisco IOS XE Software Web UI Command Injection Vulnerability
CVE-2022-20850 5.5 MEDIUM Cisco SD-WAN Arbitrary File Deletion Vulnerability
CVE-2022-20844 5.3 MEDIUM Cisco Software-Defined Application Visibility and Control on Cisco vManage Static Username
CVE-2022-20728 4.7 MEDIUM Cisco Access Points VLAN Bypass from Native VLAN Vulnerability

IV. Related Vulnerabilities

Same product: Cisco IOS XE Software
Same vendor: Cisco
Same weakness: CWE-399

V. Comments for CVE-2022-20847

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