CVE-2019-0011 Denial of service in Junos OS

What is CVE-2019-0011?

CVE-2019-0011 is a medium-severity denial of service vulnerability in Juniper Junos, published on 15 Jan 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The Junos OS kernel crashes after processing a specific incoming packet to the out of band management interface (such as fxp0, me0, em0, vme0) destined for another address. By continuously sending this type of packet, an attacker can repeatedly crash the kernel causing a sustained Denial of Service. Affected releases are Juniper Networks Junos OS: 17.2 versions prior to 17.2R1-S7, 17.2R3; 17.3 versions prior to 17.3R3-S3; 17.4 versions prior to 17.4R1-S4, 17.4R2; 17.2X75 versions prior to 17.2X75-D110; 18.1 versions prior to 18.1R2.

Which versions are affected by CVE-2019-0011?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2019-0011?

No fix has been published for CVE-2019-0011 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-0011 being exploited?

There is no known exploitation of CVE-2019-0011 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 Exploited Critical 9.8
• CVE-2020-1631 Juniper Junos OS Path Traversal Exploited High 8.8
• CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization Exploited Medium 6.7
• CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function Exploited Medium 5.3
• CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification Exploited Medium 5.3

All Juniper Junos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cx8m-q3j5-7c8p.