CVE-2019-0014

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

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.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: Junos OS 17.2X75-D91, 17.2X75-D100, 17.4R2-S1, 17.4R3, 18.1R3-S1, 18.2R1-S3, 18.2R2, 18.2X75-D5, 18.3R1, and all subsequent releases.

Workaround:

  • Disable the functionality of learning of next-hop addresses: # set services flow-monitoring (version-ipfix | version9) template nexthop-learning disable

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.48%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://kb.juniper.net/JSA10914 patch vendor advisory mitigation
http://www.securityfocus.com/bid/106556 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-0014?
CVE-2019-0014 has been scored as a high severity vulnerability.
How to fix CVE-2019-0014?
To fix CVE-2019-0014: The following software releases have been updated to resolve this specific issue: Junos OS 17.2X75-D91, 17.2X75-D100, 17.4R2-S1, 17.4R3, 18.1R3-S1, 18.2R1-S3, 18.2R2, 18.2X75-D5, 18.3R1, and all subsequent releases.
Is CVE-2019-0014 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-0014 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-2019-0014?
CVE-2019-0014 affects Juniper Networks Junos OS.
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