title: Junos OS: EX4650 Series: Certain traffic received by the Junos OS device on the management interface may be forwarded to egress interfaces instead of discarded
description: Due to an Improper Initialization vulnerability in Juniper Networks Junos OS on EX4650 devices, packets received on the management interface (em0) but not destined to the device, may be improperly forwarded to an egress interface, instead of being discarded. Such traffic being sent by a client may appear genuine, but is non-standard in nature and should be considered as potentially malicious. This issue affects: Juniper Networks Junos OS on EX4650 Series: All versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R3-S5; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R3-S7; 20.1 versions prior to 20.1R3-S3; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S2; 21.1 versions prior to 21.1R3-S1; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R2; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R1.
problem types: CWE-665 Improper Initialization
affected:
{
platforms: EX4650 Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 19.1R3-S8, status: affected, version: unspecified, versionType: custom
lessThan: 19.2R3-S5, status: affected, version: 19.2, versionType: custom
lessThan: 19.3R3-S5, status: affected, version: 19.3, versionType: custom
lessThan: 19.4R3-S7, status: affected, version: 19.4, versionType: custom
lessThan: 20.1R3-S3, status: affected, version: 20.1, versionType: custom
lessThan: 20.2R3-S4, status: affected, version: 20.2, versionType: custom
lessThan: 20.3R3-S3, status: affected, version: 20.3, versionType: custom
lessThan: 20.4R3-S2, status: affected, version: 20.4, versionType: custom
lessThan: 21.1R3-S1, status: affected, version: 21.1, versionType: custom
lessThan: 21.2R3, status: affected, version: 21.2, versionType: custom
lessThan: 21.3R2, status: affected, version: 21.3, versionType: custom
lessThan: 21.4R2, status: affected, version: 21.4, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 7.2
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
version: 3.1
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue: 19.1R3-S8, 19.2R3-S5, 19.3R3-S5, 19.4R3-S7, 20.1R3-S3, 20.2R3-S4, 20.3R3-S3, 20.4R3-S2, 21.1R3-S1, 21.2R3, 21.3R2, 21.4R2, 22.1R1, and all subsequent releases.
workarounds: Disabling the net.transit_re sysctl flag will also cause management traffic forwarded to the PFE ports to be dropped:
% sysctl -w net.transit_re=0
Note that sysctl flags do not survive a reboot.