CVE-2019-0068: Juniper Junos

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

The SRX flowd process, responsible for packet forwarding, may crash and restart when processing specific multicast packets. By continuously sending the specific multicast packets, an attacker can repeatedly crash the flowd process causing a sustained Denial of Service. This issue affects Juniper Networks Junos OS on SRX Series: 12.3X48 versions prior to 12.3X48-D90; 15.1X49 versions prior to 15.1X49-D180; 17.3 versions; 17.4 versions prior to 17.4R2-S5, 17.4R3; 18.1 versions prior to 18.1R3-S6; 18.2 versions prior to 18.2R2-S4, 18.2R3; 18.3 versions prior to 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R1-S1, 19.1R2.

Affected products

• Juniper Junos: version 12.3x48 only; version 15.1x49 only; version 17.3 only; version 17.4 only; version 18.1 only; version 18.2 only; …

Published 2019-10-09. Last modified 2026-06-17.