CVE-2021-0250

HIGH

Juniper Junos 17.4-19.2 DoS via Crafted BGP Update

Title source: llm
STIX 2.1

Description

In segment routing traffic engineering (SRTE) environments where the BGP Monitoring Protocol (BMP) feature is enable, a vulnerability in the Routing Protocol Daemon (RPD) process of Juniper Networks Junos OS allows an attacker to send a specific crafted BGP update message causing the RPD service to core, creating a Denial of Service (DoS) Condition. Continued receipt and processing of this update message will create a sustained Denial of Service (DoS) condition. This issue affects IPv4 and IPv6 environments. This issue affects: Juniper Networks Junos OS 17.4 versions 17.4R1 and above prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R2-S6, 18.2R3-S3; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3; 18.4 versions prior to 18.4R1-S5, 18.4R2-S3, 18.4R3; 19.1 versions prior to 19.1R1-S4, 19.1R2; 19.2 versions prior to 19.2R1-S3, 19.2R2, This issue does not affect Junos OS releases prior to 17.4R1. This issue affects: Juniper Networks Junos OS Evolved 19.2-EVO versions prior to 19.2R2-EVO.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_misc
https://kb.juniper.net/JSA11143

Scores

CVSS v3 7.5
EPSS 0.0039
EPSS Percentile 60.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (4)
juniper/junos 17.4 r1 (14 CPE variants)
juniper/junos 18.1 (13 CPE variants)
juniper/junos 18.2 (16 CPE variants)
juniper/junos 18.3 (7 CPE variants)
Published Apr 22, 2021
Tracked Since Feb 18, 2026