CVE-2023-28964: Juniper Junos

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause an RPD crash leading to a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. Upon receipt of a malformed BGP flowspec update, RPD will crash resulting in a Denial of Service. This issue affects Juniper Networks Junos OS: All versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3; 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: All versions prior to 20.1R3-EVO; 20.2 versions prior to 20.2R2-EVO; 20.3 versions prior to 20.3R2-EVO;

Affected products

• Juniper Junos: before 18.1 (fixed in 18.1); version 18.1 only; version 18.2 only; version 18.3 only; version 18.4 only; version 19.1 only; …
• Juniper Junos OS Evolved: before 20.1 (fixed in 20.1); version 20.1 only; version 20.2 only; version 20.3 only

Published 2023-04-17. Last modified 2026-06-17.