发布日期：2021-10-13
更新日期：2021-10-20

受影响系统：

Juniper Networks Junos OS on MX Series 21.1R1
Juniper Networks Junos OS on MX Series 20.4R2
Juniper Networks Junos OS on MX Series 20.4R1-S1
Juniper Networks Junos OS on MX Series 20.4R1
Juniper Networks Junos OS on MX Series 20.3R2-S1
Juniper Networks Junos OS on MX Series 20.3R2
Juniper Networks Junos OS on MX Series 20.2R3
Juniper Networks Junos OS on MX Series 20.2R2-S3
Juniper Networks Junos OS on MX Series 20.2R2-S2
Juniper Networks Junos OS on MX Series 20.1R2-S1
Juniper Networks Junos OS on MX Series 19.4R3-S2
Juniper Networks Junos OS on MX Series 19.4R2-S5
Juniper Networks Junos OS on MX Series 19.4R2-S4
Juniper Networks Junos OS on MX Series 19.3R3-S2
Juniper Networks Junos OS on MX Series 19.2R1-S6
Juniper Networks Junos OS on MX Series 19.1R3-S5
Juniper Networks Junos OS on MX Series 19.1R3-S4
Juniper Networks Junos OS on MX Series 18.4R3-S7
Juniper Networks Junos OS on MX Series 18.3R3-S4
Juniper Networks Junos OS on MX Series 18.2R3-S8
Juniper Networks Junos OS on MX Series 18.2R3-S7
Juniper Networks Junos OS on MX Series 18.2R2-S8
Juniper Networks Junos OS on MX Series 18.1R3-S12
Juniper Networks Junos OS on MX Series 17.4R3
Juniper Networks Junos OS on MX Series 17.4R2-S13
Juniper Networks Junos OS on MX Series 17.3R3-S11

描述：

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CVE(CAN) ID: CVE-2021-31351

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 on MS-MPC/MS-MIC存在拒绝服务漏洞。该漏洞源于程序未对异常数据包进行正确处理。攻击者可利用该漏洞通过发送特定数据包触发MS-MPC/MS-MIC重置，导致拒绝服务 (DoS)。

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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/JSA11216

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