CVE-2019-0068

Junos OS: SRX Series: Denial of Service vulnerability in flowd due to multicast packets

HIGH

7.5

CVSS Score

Published: October 9, 2019 at 07:26 PM UTC

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

25 products affected across 2 vendorsJunosSRX5600SRX5800

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

Description

The SRX flowd process, responsible for packet forwarding, may crash and restart when processing specific multicast packets. By continuously sending the specific multicast packets, an attacker can repeatedly crash the flowd process causing a sustained Denial of Service. This issue affects Juniper Networks Junos OS on SRX Series: 12.3X48 versions prior to 12.3X48-D90; 15.1X49 versions prior to 15.1X49-D180; 17.3 versions; 17.4 versions prior to 17.4R2-S5, 17.4R3; 18.1 versions prior to 18.1R3-S6; 18.2 versions prior to 18.2R2-S4, 18.2R3; 18.3 versions prior to 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R1-S1, 19.1R2.

Affected

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

Junos · Juniper Networks

95%

12.3X48 ≤ v < 12.3X48-D9015.1X49 ≤ v < 15.1X49-D18017.4 ≤ v < 17.4R2-S5, 17.4R318.1 ≤ v < 18.1R3-S618.2 ≤ v < 18.2R2-S4, 18.2R318.3 ≤ v < 18.3R2-S1, 18.3R318.4 ≤ v < 18.4R219.1 ≤ v < 19.1R1-S1, 19.1R212.3X48 12.3x48 d10 12.3x48 d15 12.3x48 d20 12.3x48 d25 12.3x48 d30 12.3x48 d35 12.3x48 d40 12.3x48 d45 12.3x48 d50 12.3x48 d55 12.3x48 d60 12.3x48 d65 12.3x48 d70 12.3x48 d7512.3x48 d8012.3x48 d85 15.1X49 15.1x49 d10 15.1x49 d100 15.1x49 d110 15.1x49 d120 15.1x49 d130 15.1x49 d140 15.1x49 d150 15.1x49 d160 15.1x49 d170 15.1x49 d20 15.1x49 d30 15.1x49 d35 15.1x49 d40 15.1x49 d45 15.1x49 d50 15.1x49 d55 15.1x49 d60 15.1x49 d65 15.1x49 d70 15.1x49 d75 15.1x49 d80 15.1x49 d90 17.3 17.3 r2 17.3 r2-s1 17.3 r2-s2 17.3 r3-s1 17.3 r3-s2 17.3 r3-s3 17.3 r3-s4 17.3 r3-s5 17.3 r3-s6 17.4 17.4 r1 17.4 r1-s1 17.4 r1-s2 17.4 r1-s4 17.4 r2 17.4 r2-s1 17.4 r2-s3 17.4 r2-s4 18.1 18.1 r2 18.1 r2-s1 18.1 r2-s2 18.1 r2-s4 18.1 r3 18.1 r3-s2 18.1 r3-s3 18.1 r3-s4 18.1 r3-s5 18.2 18.2 r1-s5 18.2 r2-s1 18.2 r2-s2 18.2 r2-s3 18.3 18.3 r1 18.3 r1-s1 18.3 r1-s2 18.3 r1-s3 18.3 r2 18.4 18.4 r1 18.4 r1-s2 18.4 r1-s3 18.4 r1-s4 19.1 19.1 r1

Affected range stops below 12.3X48-D90, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1X49-D180, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4R2-S5, 17.4R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1R3-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2R2-S4, 18.2R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.3R2-S1, 18.3R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.4R2, so it looks safe — our inference, not a vendor statement

Affected range stops below 19.1R1-S1, 19.1R2, so it looks safe — our inference, not a vendor statement

juniper-csrx (environment) · juniper-srx100 (environment) · juniper-srx110 (environment) · juniper-srx1400 (environment) · juniper-srx1500 (environment) · juniper-srx210 (environment) · juniper-srx220 (environment) · juniper-srx240 (environment) · juniper-srx300 (environment) · juniper-srx320 (environment) · juniper-srx340 (environment) · juniper-srx3400 (environment) · juniper-srx345 (environment) · juniper-srx3600 (environment) · juniper-srx4100 (environment) · juniper-srx4200 (environment) · juniper-srx4600 (environment) · juniper-srx5400 (environment) · juniper-srx550 (environment) · juniper-srx550-hm (environment) · juniper-srx5600 (environment) · juniper-srx5800 (environment) · juniper-srx650 (environment) · juniper-vsrx (environment)

Csrx · Juniperdevice

80%

All versions

SRX100 · Juniperdevice

80%

All versions

SRX110 · Juniperdevice

80%

All versions

SRX1400 · Juniperdevice

80%

All versions