CVE-2018-0002

MX series, SRX series: Junos OS: Denial of service vulnerability in Flowd on devices with ALG enabled.

HIGH

8.2

CVSS Score

Published: January 10, 2018 at 10:00 PM UTC

Updated: June 17, 2026 at 01:29 AM UTC

31 products affected across 2 vendorsJunosSRX5600SRX5800

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Severity

HIGH8.2

Exploit prediction

EPSS 2%

Description

On SRX Series and MX Series devices with a Service PIC with any ALG enabled, a crafted TCP/IP response packet processed through the device results in memory corruption leading to a flowd daemon crash. Sustained crafted response packets lead to repeated crashes of the flowd daemon which results in an extended Denial of Service condition. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D60 on SRX series; 12.3X48 versions prior to 12.3X48-D35 on SRX series; 14.1 versions prior to 14.1R9 on MX series; 14.2 versions prior to 14.2R8 on MX series; 15.1X49 versions prior to 15.1X49-D60 on SRX series; 15.1 versions prior to 15.1R5-S8, 15.1F6-S9, 15.1R6-S4, 15.1R7 on MX series; 16.1 versions prior to 16.1R6 on MX series; 16.2 versions prior to 16.2R3 on MX series; 17.1 versions prior to 17.1R2-S4, 17.1R3 on MX series. No other Juniper Networks products or platforms are affected by this issue.

Affected

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

Junos · Juniper Networks

95%

12.1X46 ≤ v < 12.1X46-D6012.3X48 ≤ v < 12.3X48-D3514.1 ≤ v < 14.1R914.2 ≤ v < 14.2R815.1 ≤ v < 15.1R5-S8, 15.1F6-S9, 15.1R6-S4, 15.1R715.1X49 ≤ v < 15.1X49-D6016.1 ≤ v < 16.1R616.2 ≤ v < 16.2R317.1 ≤ v < 17.1R2-S4, 17.1R312.1X46 12.1x46 d10 12.1x46 d15 12.1x46 d2012.1x46 d2512.1x46 d30 12.1x46 d35 12.1x46 d40 12.1x46 d45 12.1x46 d50 12.1x46 d55 12.3X48 12.3x48 d10 12.3x48 d15 12.3x48 d20 12.3x48 d25 12.3x48 d30 14.1 14.1 r1 14.1 r2 14.1 r3 14.1 r4 14.1 r5 14.1 r6 14.1 r7 14.1 r8 14.2 14.2 r1 14.2 r2 14.2 r3 14.2 r4 14.2 r5 14.2 r6 14.2 r7 15.1 15.1 f6-s9 15.1 r1 15.1 r2 15.1 r3 15.1 r4 15.1 r6-s4 15.1 r7 15.1X49 15.1x49 d10 15.1x49 d15 15.1x49 d20 15.1x49 d25 15.1x49 d30 15.1x49 d35 15.1x49 d40 15.1x49 d45 15.1x49 d50 15.1x49 d55 16.1 16.1 r1 16.1 r2 16.1 r3 16.1 r4 16.1 r5 16.2 16.2 r1 16.2 r2 17.1 17.1 r1 17.1 r3

Affected range stops below 12.1X46-D60, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.3X48-D35, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.1R9, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.2R8, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1R5-S8, 15.1F6-S9, 15.1R6-S4, 15.1R7, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1X49-D60, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R6, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.2R3, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1R2-S4, 17.1R3, so it looks safe — our inference, not a vendor statement

juniper-mx10 (environment) · juniper-mx104 (environment) · juniper-mx2010 (environment) · juniper-mx2020 (environment) · juniper-mx240 (environment) · juniper-mx40 (environment) · juniper-mx480 (environment) · juniper-mx5 (environment) · juniper-mx80 (environment) · juniper-mx960 (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-srx5400 (environment) · juniper-srx550 (environment) · juniper-srx5600 (environment) · juniper-srx5800 (environment) · juniper-srx650 (environment)

Mx10 · Juniperdevice

80%

All versions

Mx104 · Juniperdevice

80%

All versions

Mx2010 · Juniperdevice

80%

All versions

Mx2020 · Juniperdevice

80%

All versions