CVE-2019-0014

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

HIGH

7.5

CVSS Score

Published: January 15, 2019 at 09:00 PM UTC

Updated: June 17, 2026 at 02:07 AM UTC

17 products affected across 2 vendorsJunosQfx5200Qfx5110

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Severity

HIGH7.5

Exploit prediction

EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos · Juniper Networks

95%

17.2X75 ≤ v < 17.2X75-D91, 17.2X75-D10017.4 ≤ v < 17.4R2-S1, 17.4R318.1 ≤ v < 18.1R3-S1, 18.1R418.2 ≤ v < 18.2R1-S3, 18.2R217.2X75 17.2x75 d102 17.2x75 d50 17.2x75 d70 17.4 17.4 r1 17.4 r2 18.1 18.2 18.2 r1

Affected range stops below 17.2X75-D91, 17.2X75-D100, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4R2-S1, 17.4R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1R3-S1, 18.1R4, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2R1-S3, 18.2R2, so it looks safe — our inference, not a vendor statement

juniper-ptx1000 (environment) · juniper-ptx10002 (environment) · juniper-ptx10008 (environment) · juniper-ptx10016 (environment) · juniper-ptx3000 (environment) · juniper-ptx5000 (environment) · juniper-qfx10002 (environment) · juniper-qfx10008 (environment) · juniper-qfx10016 (environment) · juniper-qfx3500 (environment) · juniper-qfx3600 (environment) · juniper-qfx5100 (environment) · juniper-qfx5110 (environment) · juniper-qfx5120 (environment) · juniper-qfx5200 (environment) · juniper-qfx5210 (environment)

Ptx1000 · Juniperdevice

80%

All versions

Ptx10002 · Juniperdevice

80%

All versions

Ptx10008 · Juniperdevice

80%

All versions

Ptx10016 · Juniperdevice

80%

All versions