CVE-2019-0041 Junos OS: EX4300-MP Series: IP transit traffic can reach the control plane via loopback interface.
Attackers can bypass loopback filters to reach the control plane on Juniper EX4300-MP switches, potentially causing service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-0041?
CVE-2019-0041 is a medium-severity vulnerability in Juniper Junos, published on 10 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-284
Which versions are affected by CVE-2019-0041?
It affects 1 product.
Products include Juniper Junos.
How do I fix CVE-2019-0041?
No fix has been published for CVE-2019-0041 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-0041 being exploited?
There is no known exploitation of CVE-2019-0041 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos
- CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification
- CVE-2020-1631 Juniper Junos OS Path Traversal
- CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization
- CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function
- CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification
Sources
Also known as GHSA-5jhv-p44r-72j3.