CVE-2017-2304: Juniper Junos

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Juniper Networks QFX3500, QFX3600, QFX5100, QFX5200, EX4300 and EX4600 devices running Junos OS 14.1X53 prior to 14.1X53-D40, 15.1X53 prior to 15.1X53-D40, 15.1 prior to 15.1R2, do not pad Ethernet packets with zeros, and thus some packets can contain fragments of system memory or data from previous packets. This issue is also known as 'Etherleak'

Affected products

• Juniper Junos: version 14.1x53 only; version 15.1 only; version 15.1x53 only

Published 2017-05-30. Last modified 2026-06-17.