CVE-2019-0009: Junos OS: EX2300 and EX3400: High disk I/O operations may disrupt the communication between RE and PFE

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-01-15 · updated 2026-06-17

Description

On EX2300 and EX3400 series, high disk I/O operations may disrupt the communication between the routing engine (RE) and the packet forwarding engine (PFE). In a virtual chassis (VC) deployment, this issue disrupts communication between the VC members. This issue does not affect other Junos platforms. Affected releases are Junos OS on EX2300 and EX3400 series: 15.1X53 versions prior to 15.1X53-D590; 18.1 versions prior to 18.1R2-S2, 18.1R3; 18.2 versions prior to 18.2R2.

Affected products

Juniper Junos OS: 15.1x53-d50, 15.1x53-d51, 15.1x53-d52, 15.1x53-d55, 15.1x53-d57, 15.1x53-d58 (+4)

References

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