CVE:CVE-2021-0287
CNNVD:CNNVD-202107-999
Juniper Networks Junos OS Evolved是美国瞻博网络（Juniper Networks）公司的Junos OS 的升级版系统。
Junos OS Evolved 存在代码问题漏洞，该漏洞源于设备配置了用于分段路由和基于传感器的统计信息的ISIS灵活算法，网络中ISIS链路的一个襟翼可以导致路由进程守护程序崩溃并重新启动，从而导致拒绝服务。以下产品及版本受到影响：Junos OS 19.4, 20.1, 20.2, 20.3. This issue affects Junos OS Evolved 19.4, 20.1, 20.2, 20.3, 20.4。
solution:Upgrade juniper junos to a higher version than 19.4:r1,19.4:r1-s1,19.4:r1-s2,19.4:r1-s3,19.4:r2,19.4:r2-s1,19.4:r2-s2,19.4:r2-s3,19.4:r3,19.4:r3-s1,20.1:r1,20.1:r1-s1,20.1:r1-s2,20.1:r1-s3,20.1:r1-s4,20.1:r2,20.2:r1,20.2:r1-s1,20.2:r1-s2,20.2:r1-s3,20.2:r2,20.2:r2-s1,20.3:r1,20.3:r1-s1,and avoid the version 19.4:r1,19.4:r1-s1,19.4:r1-s2,19.4:r1-s3,19.4:r2,19.4:r2-s1,19.4:r2-s2,19.4:r2-s3,19.4:r3,19.4:r3-s1,20.1:r1,20.1:r1-s1,20.1:r1-s2,20.1:r1-s3,20.1:r1-s4,20.1:r2,20.2:r1,20.2:r1-s1,20.2:r1-s2,20.2:r1-s3,20.2:r2,20.2:r2-s1,20.3:r1,20.3:r1-s1; Upgrade juniper junos_os_evolved to a higher version than 20.3,20.3:r1,20.4:r1-s1,and avoid the version 20.3,20.3:r1,20.4:r1-s1