CVE-2019-0041

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

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.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: 18.2R1-S2, 18.2R2, 18.3R1, and all subsequent releases.

Workaround:

  • Removing lo0 filters would mitigate this issue.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.28%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA10933 mitigation vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-0041?
CVE-2019-0041 has been scored as a high severity vulnerability.
How to fix CVE-2019-0041?
To fix CVE-2019-0041: The following software releases have been updated to resolve this specific issue: 18.2R1-S2, 18.2R2, 18.3R1, and all subsequent releases.
Is CVE-2019-0041 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-0041 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-0041?
CVE-2019-0041 affects Juniper Networks Junos OS.
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