发布日期：2021-10-13
更新日期：2021-10-20

受影响系统：

Juniper Networks Junos OS on QFX Series < 17.3R3-S11
Juniper Networks Junos OS on QFX Series 20.3
Juniper Networks Junos OS on QFX Series 20.2
Juniper Networks Junos OS on QFX Series 20.1
Juniper Networks Junos OS on QFX Series 19.4
Juniper Networks Junos OS on QFX Series 19.3
Juniper Networks Junos OS on QFX Series 19.2
Juniper Networks Junos OS on QFX Series 19.1
Juniper Networks Junos OS on QFX Series 18.4
Juniper Networks Junos OS on QFX Series 18.3
Juniper Networks Junos OS on QFX Series 18.2
Juniper Networks Junos OS on QFX Series 18.1
Juniper Networks Junos OS on QFX Series 17.4
Juniper Networks Junos OS on PTX Series < 18.4R3-S9
Juniper Networks Junos OS on PTX Series 21.1
Juniper Networks Junos OS on PTX Series 20.4
Juniper Networks Junos OS on PTX Series 20.3
Juniper Networks Junos OS on PTX Series 20.2
Juniper Networks Junos OS on PTX Series 20.1
Juniper Networks Junos OS on PTX Series 19.4
Juniper Networks Junos OS on PTX Series 19.3
Juniper Networks Junos OS on PTX Series 19.2
Juniper Networks Junos OS on PTX Series 19.1

描述：

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CVE(CAN) ID: CVE-2021-31361

Junos OS是Juniper Networks硬件路由器中使用的基于FreeBSD的操作系统。它是Juniper网络路由，交换和安全设备中使用的操作系统。
Juniper Networks Junos OS QFX Series和PTX Series存在拒绝服务漏洞。该漏洞源于程序未对异常进行正确处理。攻击者可利用该漏洞通过发送特定的IP数据包增加FPC CPU利用率，造成拒绝服务。

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建议：

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厂商补丁：

Juniper Networks
----------------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

https://kb.juniper.net/JSA11223

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