发布日期：2023-03-09
更新日期：2023-05-24

受影响系统：

Cisco Cisco ASR 9000 Series Aggregation Services Routers
Cisco Cisco ASR 9902 Compact High-Performance Routers
Cisco Cisco ASR 9903 Compact High-Performance Routers

描述：

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CVE(CAN) ID: CVE-2023-20049

Cisco ASR 900 Series等都是美国思科（Cisco）公司聚合服务路由器。
Cisco ASR 9000 Series Aggregation Services Routers、ASR 9902 Compact High-Performance Routers和ASR 9903 Compact High-Performance Routers存在拒绝服务漏洞，该漏洞源于程序未正确处理格式错误的BFD数据包，未经身份认证的远程攻击者可利用该漏洞导致拒绝服务。

<*链接：https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bfd-XmRescbT
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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-bfd-XmRescbT）以及相应补丁:
cisco-sa-bfd-XmRescbT：Cisco IOS XR Software for ASR 9000 Series Routers Bidirectional Forwarding Detection Denial of Service Vulnerability
链接：https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bfd-XmRescbT

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