title: Junos OS: EX2300 and EX3400: High disk I/O operations may disrupt the communication between RE and PFE
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.
problem types: DoS
affected:
{
platforms: EX2300 and EX3400 series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1X53-D113, 15.1X53-D590, status: affected, version: 15.1X53, versionType: custom
lessThan: 18.1R2-S2, 18.1R3, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R2, status: affected, version: 18.2, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 5.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
version: 3.0
]
solutions: The following software releases have been updated to resolve this specific issue: Junos OS 15.1X53-D113, 15.1X53-D590, 18.1R2-S2, 18.1R3, 18.2R2, 18.3R1, and all subsequent releases.
workarounds: Avoid performing operation that may generate high disk I/O.
Limiting the access to the device to only trusted administrators from trusted administrative networks or hosts would minimize the risk.