CVE-2019-0014 Junos OS: QFX and PTX Series: FPC process crashes after J-Flow processes a malformed packet

High 7.5 Published 15 Jan 2019 Updated 17 Sep 2024

An attacker can cause a sustained Denial of Service on Juniper QFX and PTX switches by sending malformed J-Flow packets that crash the FPC process.

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-2019-0014?

CVE-2019-0014 is a high-severity denial of service vulnerability in Juniper Junos, published on 15 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On QFX and PTX Series, receipt of a malformed packet for J-Flow sampling might crash the FPC (Flexible PIC Concentrator) process which causes all interfaces to go down. By continuously sending the offending packet, an attacker can repeatedly crash the FPC process causing a sustained Denial of Service (DoS). This issue affects both IPv4 and IPv6 packet processing. Affected releases are Juniper Networks Junos OS on QFX and PTX Series: 17.4 versions prior to 17.4R2-S1, 17.4R3; 18.1 versions prior to 18.1R3-S1; 18.2 versions prior to 18.2R1-S3, 18.2R2; 17.2X75 versions prior to 17.2X75-D91, 17.2X75-D100.

Weakness: CWE-19

Which versions are affected by CVE-2019-0014?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2019-0014?

No fix has been published for CVE-2019-0014 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-2019-0014 being exploited?

There is no known exploitation of CVE-2019-0014 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-4xc8-4pxw-5m97.