Vulnerability Monitor

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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 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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, for affected systems. Impacting 20 products from juniper, from juniper, from juniper and 17 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-07-11T20:15:11.257

Last Modified

2024-11-21T04:16:07.733

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.8 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-200
Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Operating System	juniper	junos	14.1x53	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Operating System	juniper	junos	17.1	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Operating System	juniper	junos	17.2	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	17.3	Yes
Operating System	juniper	junos	17.3	Yes
Operating System	juniper	junos	17.3	Yes
Operating System	juniper	junos	17.3	Yes
Operating System	juniper	junos	17.3	Yes
Operating System	juniper	junos	17.3	Yes
Operating System	juniper	junos	17.3	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Operating System	juniper	junos	17.4	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	18.1	Yes
Operating System	juniper	junos	18.1	Yes
Operating System	juniper	junos	18.1	Yes
Operating System	juniper	junos	18.1	Yes
Operating System	juniper	junos	18.1	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Operating System	juniper	junos	18.2	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No
Operating System	juniper	junos	18.3	Yes
Operating System	juniper	junos	18.3	Yes
Operating System	juniper	junos	18.3	Yes
Operating System	juniper	junos	18.3	Yes
Operating System	juniper	junos	18.3	Yes
Operating System	juniper	junos	18.3	Yes
Hardware	juniper	ex4300-24p	-	No
Hardware	juniper	ex4300-24p-s	-	No
Hardware	juniper	ex4300-24t	-	No
Hardware	juniper	ex4300-24t-s	-	No
Hardware	juniper	ex4300-32f	-	No
Hardware	juniper	ex4300-32f-dc	-	No
Hardware	juniper	ex4300-32f-s	-	No
Hardware	juniper	ex4300-48mp	-	No
Hardware	juniper	ex4300-48mp-s	-	No
Hardware	juniper	ex4300-48p	-	No
Hardware	juniper	ex4300-48p-s	-	No
Hardware	juniper	ex4300-48t	-	No
Hardware	juniper	ex4300-48t-afi	-	No
Hardware	juniper	ex4300-48t-dc	-	No
Hardware	juniper	ex4300-48t-dc-afi	-	No
Hardware	juniper	ex4300-48t-s	-	No
Hardware	juniper	ex4300-48tafi	-	No
Hardware	juniper	ex4300-48tdc	-	No
Hardware	juniper	ex4300-48tdc-afi	-	No

References

https://kb.juniper.net/JSA10942 Patch, Vendor Advisory ([email protected])
https://kb.juniper.net/JSA10942 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For juniper's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.