发布日期：2020-09-24
更新日期：2020-10-09

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 9100 Access Points

描述：

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CVE(CAN) ID: CVE-2020-3486

Cisco Catalyst 9800 Series Wireless Controllers是美国思科（Cisco）公司的无线局域网控制器。
Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers在处理和控制无线接入点（CAPWAP）协议时存在拒绝服务漏洞。该漏洞源于程序未对CAPWAP数据包处理期间的输入进行正确验证。未经身份认证的攻击者可通过将特制的CAPWAP数据包发送到受影响设备利用该漏洞造成受影响的设备崩溃并重新加载，从而导致其拒绝服务。

<*来源：Cisco
  
  链接：https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capwap-dos-TPdNTdyq
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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-capwap-dos-TPdNTdyq）以及相应补丁:
cisco-sa-capwap-dos-TPdNTdyq：Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service Vulnerabilities
链接：https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-capwap-dos-TPdNTdyq

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