发布日期：2021-09-22
更新日期：2021-09-23

受影响系统：

Cisco Catalyst 9800 Series Wireless Controllers
Cisco Catalyst 9800 Embedded Wireless Controller for Catalyst 9500 Series
Cisco Catalyst 9800 Embedded Wireless Controller for Catalyst 9400 Series
Cisco Catalyst 9800 Embedded Wireless Controller for Catalyst 9300 Series
Cisco Embedded Wireless Controller on Catalyst Access Po
Cisco 9800-CL Wireless Controllers for Cloud

描述：

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CVE(CAN) ID: CVE-2021-34770

Cisco IOS XE是美国Cisco公司为其网络设备开发的一套基于Linux内核的模块化操作系统。
Cisco IOS XE Software的Cisco Catalyst 9000 Family Wireless Controllers的CAPWAP协议处理存在远程代码执行漏洞。该漏洞源于程序在验证CAPWAP数据包过程中发生逻辑错误。攻击者可通过发送特制CAPWAP数据包利用该漏洞执行任意命令或导致设备重新加载（拒绝服务）。

<*链接：https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-rce-LYgj8
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建议：

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厂商补丁：

Cisco
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Cisco已经为此发布了一个安全公告（cisco-sa-ewlc-capwap-rce-LYgj8Kf）以及相应补丁:
cisco-sa-ewlc-capwap-rce-LYgj8Kf：Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability
链接：https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-rce-LYgj8Kf

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