On Juniper Networks Junos OS and Junos OS Evolved devices processing a specially crafted BGP UPDATE or KEEPALIVE message can lead to a routing process daemon (RPD) crash and restart, causing a Denial of Service (DoS). Continued receipt and processing of this message will create a sustained Denial of Service (DoS) condition. This issue affects both IBGP and EBGP deployments over IPv4 or IPv6. This issue affects: Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S11.

17.4 versions prior to 17.4R2-S13, 17.4R3-S4.

18.1 versions prior to 18.1R3-S12.

18.2 versions prior to 18.2R2-S8, 18.2R3-S7.

18.3 versions prior to 18.3R3-S4.

18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7.

19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S4.

19.2 versions prior to 19.2R1-S6, 19.2R3-S1.

19.3 versions prior to 19.3R2-S5, 19.3R3-S1.

19.4 versions prior to 19.4R1-S4, 19.4R2-S3, 19.4R3-S1.

20.1 versions prior to 20.1R2.

20.2 versions prior to 20.2R2.

20.3 versions prior to 20.3R1-S1, 20.3R2. Juniper Networks Junos OS Evolved: 20.3 versions prior to 20.3R2-EVO.