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MEDIUM · 5.8

CVE-2019-0048

On EX4300 Series switches with TCAM optimization enabled, incoming multicast traffic matches an implicit loopback filter rule first, since it has high priority. This rule is meant for reserved multica...

Vulnerability Description

On EX4300 Series switches with TCAM optimization enabled, incoming multicast traffic matches an implicit loopback filter rule first, since it has high priority. This rule is meant for reserved multicast addresses 224.0.0.x, but incorrectly matches on 224.x.x.x. Due to this bug, when a firewall filter is applied on the loopback interface, other firewall filters might stop working for multicast traffic. The command 'show firewall filter' can be used to confirm whether the filter is working. This issue only affects the EX4300 switch. No other products or platforms are affected by this vulnerability. This issue affects: Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D51, 14.1X53-D115 on EX4300 Series; 17.1 versions prior to 17.1R3 on EX4300 Series; 17.2 versions prior to 17.2R3-S2 on EX4300 Series; 17.3 versions prior to 17.3R3-S3 on EX4300 Series; 17.4 versions prior to 17.4R2-S5, 17.4R3 on EX4300 Series; 18.1 versions prior to 18.1R3-S1 on EX4300 Series; 18.2 versions prior to 18.2R2 on EX4300 Series; 18.3 versions prior to 18.3R2 on EX4300 Series.

CVSS Score

5.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
JuniperJunos14.1x53
JuniperEx4300-24P-
JuniperEx4300-24P-S-
JuniperEx4300-24T-
JuniperEx4300-24T-S-
JuniperEx4300-32F-
JuniperEx4300-32F-Dc-
JuniperEx4300-32F-S-
JuniperEx4300-48Mp-
JuniperEx4300-48Mp-S-
JuniperEx4300-48P-
JuniperEx4300-48P-S-
JuniperEx4300-48T-
JuniperEx4300-48T-Afi-
JuniperEx4300-48T-Dc-
JuniperEx4300-48T-Dc-Afi-
JuniperEx4300-48T-S-
JuniperEx4300-48Tafi-
JuniperEx4300-48Tdc-
JuniperEx4300-48Tdc-Afi-

Related Weaknesses (CWE)

CWE-200

References

FAQ

What is CVE-2019-0048?

CVE-2019-0048 is a vulnerability with a CVSS score of 5.8 (MEDIUM). On EX4300 Series switches with TCAM optimization enabled, incoming multicast traffic matches an implicit loopback filter rule first, since it has high priority. This rule is meant for reserved multica...

How severe is CVE-2019-0048?

CVE-2019-0048 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-0048?

Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos, Juniper Ex4300-24P, Juniper Ex4300-24P-S, Juniper Ex4300-24T, Juniper Ex4300-24T-S.