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.
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
User Interaction None
Attack Vector Network
Attack Complexity Low
Privileges Required None
Scope Changed
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
User Interaction None
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
AV:N/AC:L/Au:N/C:N/I:P/A:N
Vendors | Products |
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Juniper |
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Configuration 2 [-]
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Configuration 3 [-]
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Configuration 4 [-]
AND |
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Configuration 5 [-]
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Configuration 6 [-]
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Configuration 7 [-]
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Configuration 8 [-]
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References
Link | Resource |
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https://kb.juniper.net/JSA10942 | Patch Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: juniper
Published: 2019-07-10T00:00:00
Updated: 2019-07-11T19:40:52
Reserved: 2018-10-11T00:00:00
Link: CVE-2019-0048
JSON object: View
NVD Information
Status : Analyzed
Published: 2019-07-11T20:15:11.257
Modified: 2020-09-29T00:28:39.690
Link: CVE-2019-0048
JSON object: View
Redhat Information
No data.
CWE