CVE-2019-0041

Junos OS: EX4300-MP Series: IP transit traffic can reach the control plane via loopback interface.

HIGH
8.6
CVSS Score
Published: April 10, 2019 at 08:13 PM UTC
Updated: June 17, 2026 at 02:07 AM UTC
2 products affected across 2 vendorsJunosEx4300-Mp

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Severity
HIGH8.6
Exploit prediction
EPSS 0.9%

Description

On EX4300-MP Series devices with any lo0 filters applied, transit network traffic may reach the control plane via loopback interface (lo0). The device may fail to forward such traffic. This issue affects Juniper Networks Junos OS 18.2 versions prior to 18.2R1-S2, 18.2R2 on EX4300-MP Series. This issue does not affect any other EX series devices.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

18.2 ≤ v < 18.2R1-S2, 18.2R218.218.2 r1
Affected range stops below 18.2R1-S2, 18.2R2, so it looks safe — our inference, not a vendor statement
juniper-ex4300-mp (environment)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMMitigationVendor Advisory
https://kb.juniper.net/JSA10933

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-284NVD-CWE-noinfo

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