发布日期：2021-10-13
更新日期：2021-10-20

受影响系统：

Juniper Networks Junos OS SRX300 Series < 17.4R3-S5
Juniper Networks Junos OS SRX300 Series 20.4
Juniper Networks Junos OS SRX300 Series 20.3
Juniper Networks Junos OS SRX300 Series 20.2
Juniper Networks Junos OS SRX300 Series 20.1
Juniper Networks Junos OS SRX300 Series 19.4
Juniper Networks Junos OS SRX300 Series 19.3
Juniper Networks Junos OS SRX300 Series 19.2
Juniper Networks Junos OS SRX300 Series 19.1
Juniper Networks Junos OS SRX300 Series 18.4
Juniper Networks Junos OS SRX300 Series 18.3
Juniper Networks Junos OS SRX500 Series < 17.4R3-S5
Juniper Networks Junos OS SRX500 Series 20.4
Juniper Networks Junos OS SRX500 Series 20.3
Juniper Networks Junos OS SRX500 Series 20.2
Juniper Networks Junos OS SRX500 Series 20.1
Juniper Networks Junos OS SRX500 Series 19.4
Juniper Networks Junos OS SRX500 Series 19.3
Juniper Networks Junos OS SRX500 Series 19.2
Juniper Networks Junos OS SRX500 Series 19.1
Juniper Networks Junos OS SRX500 Series 18.4
Juniper Networks Junos OS SRX500 Series 18.3
Juniper Networks Junos OS SRX1500 < 17.4R3-S5
Juniper Networks Junos OS SRX1500 20.4
Juniper Networks Junos OS SRX1500 20.3
Juniper Networks Junos OS SRX1500 20.2
Juniper Networks Junos OS SRX1500 20.1
Juniper Networks Junos OS SRX1500 19.4
Juniper Networks Junos OS SRX1500 19.3
Juniper Networks Junos OS SRX1500 19.2
Juniper Networks Junos OS SRX1500 19.1
Juniper Networks Junos OS SRX1500 18.4
Juniper Networks Junos OS SRX1500 18.3
Juniper Networks Junos OS SRX5000 Series with SPC2 < 17.4R3-S5
Juniper Networks Junos OS SRX5000 Series with SPC2 20.4
Juniper Networks Junos OS SRX5000 Series with SPC2 20.3
Juniper Networks Junos OS SRX5000 Series with SPC2 20.2
Juniper Networks Junos OS SRX5000 Series with SPC2 20.1
Juniper Networks Junos OS SRX5000 Series with SPC2 19.4
Juniper Networks Junos OS SRX5000 Series with SPC2 19.3
Juniper Networks Junos OS SRX5000 Series with SPC2 19.2
Juniper Networks Junos OS SRX5000 Series with SPC2 19.1
Juniper Networks Junos OS SRX5000 Series with SPC2 18.4
Juniper Networks Junos OS SRX5000 Series with SPC2 18.3

描述：

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CVE(CAN) ID: CVE-2021-31364

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 SRX300系列、SRX500系列、SRX1500和SRX5000系列的流守护程序 (flowd) 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造成flowd/srxpfe进程崩溃，导致拒绝服务。

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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/JSA11226

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