CVE-2021-0211

An improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved Routing Protocol Daemon (RPD) service allows an attacker to send a valid BGP FlowSpec message thereby causing an unexpected change in the route advertisements within the BGP FlowSpec domain leading to disruptions in network traffic causing a Denial of Service (DoS) condition. Continued receipt of these update messages will cause a sustained Denial of Service condition. This issue affects Juniper Networks: Junos OS: All versions prior to 17.3R3-S10 with the exceptions of 15.1X49-D240 on SRX Series and 15.1R7-S8 on EX Series; 17.3 versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R2-S12, 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1; 19.4 versions prior to 19.4R1-S3, 19.4R2-S3, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S3 20.2R2; 20.3 versions prior to 20.3R1-S1, 20.3R2. Junos OS Evolved: All versions prior to 20.3R1-S1-EVO, 20.3R2-EVO.

An improper check for unusual or exceptional conditions in Juniper Networks Junos OS and Junos OS Evolved Routing Protocol Daemon (RPD) service allows an attacker to send a valid BGP FlowSpec message thereby causing an unexpected change in the route advertisements within the BGP FlowSpec domain leading to disruptions in network traffic causing a Denial of Service (DoS) condition. Continued receipt of these update messages will cause a sustained Denial of Service condition. This issue affects Juniper Networks: Junos OS: All versions prior to 17.3R3-S10 with the exceptions of 15.1X49-D240 on SRX Series and 15.1R7-S8 on EX Series; 17.3 versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R2-S12, 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S3; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1; 19.4 versions prior to 19.4R1-S3, 19.4R2-S3, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S3 20.2R2; 20.3 versions prior to 20.3R1-S1, 20.3R2. Junos OS Evolved: All versions prior to 20.3R1-S1-EVO, 20.3R2-EVO.

Una comprobación inapropiada de condiciones inusuales o excepcionales en Juniper Networks. El servicio Routing Protocol Daemon (RPD) de Junos OS y Junos OS Evolved permite a un atacante enviar un mensaje BGP FlowSpec válido, causando un cambio inesperado en los anuncios de ruta dentro del dominio BGP FlowSpec que conlleva a interrupciones en el tráfico de la red que causan una condición de Denegación de Servicio (DoS). La recepción continua de estos mensajes de actualización causará una condición sostenida de Denegación de Servicio. Este problema afecta a Juniper Networks: Junos OS: todas las versiones anteriores a 17.3R3-S10 con las excepciones de 15.1X49-D240 en la serie SRX y 15.1R7-S8 en la Serie EX; versiones 17.3 anteriores a 17.3R3-S10; versiones 17.4 anteriores a 17.4R2-S12, 17.4R3-S4; versiones 18.1 anteriores a 18.1R3-S12; versiones 18.2 anteriores a 18.2R2-S8, 18.2R3-S6; versiones 18.3 anteriores a 18.3R3-S4; versiones 18.4 anteriores a 18. 4R1-S8, 18.4R2-S6, 18.4R3-S6; versiones 19.1 anteriores a 19.1R1-S6, 19.1R2-S2, 19.1R3-S3; versiones 19.2 anteriores a 19.2R3-S1; versiones 19.3 anteriores a 19.3R2-S5, 19.3R3-S1; versiones 19.4 anteriores a 19.4R1-S3, 19.4R2-S3, 19.4R3; versiones 20.1 anteriores a 20.1R2; versiones 20.2 anteriores a 20.2R1-S3 20.2R2; versiones 20.3 anteriores a 20.3R1-S1, 20.3R2. Junos OS Evolved: todas las versiones anteriores a 20.3R1-S1-EVO, 20.3R2-EVO