CVE-2019-0063

Junos OS: MX Series: jdhcpd crash when receiving a specific crafted DHCP response message

HIGH

7.5

CVSS Score

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

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

18 products affected across 2 vendorsJunosMx960Mx480

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

Description

When an MX Series Broadband Remote Access Server (BRAS) is configured as a Broadband Network Gateway (BNG) with DHCPv6 enabled, jdhcpd might crash when receiving a specific crafted DHCP response message on a subscriber interface. The daemon automatically restarts without intervention, but continuous receipt of specific crafted DHCP messages will repeatedly crash jdhcpd, leading to an extended Denial of Service (DoS) condition. This issue only affects systems configured with DHCPv6 enabled. DHCPv4 is unaffected by this issue. This issue affects Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S5 on MX Series; 16.1 versions prior to 16.1R7-S5 on MX Series; 16.2 versions prior to 16.2R2-S10 on MX Series; 17.1 versions prior to 17.1R3-S1 on MX Series; 17.2 versions prior to 17.2R3-S2 on MX Series; 17.3 versions prior to 17.3R3-S6 on MX Series; 17.4 versions prior to 17.4R2-S5, 17.4R3 on MX Series; 18.1 versions prior to 18.1R3-S6 on MX Series; 18.2 versions prior to 18.2R2-S4, 18.2R3 on MX Series; 18.2X75 versions prior to 18.2X75-D50 on MX Series; 18.3 versions prior to 18.3R1-S5, 18.3R3 on MX Series; 18.4 versions prior to 18.4R2 on MX Series; 19.1 versions prior to 19.1R1-S2, 19.1R2 on MX Series.

Affected

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

Junos · Juniper Networks

95%

15.1 ≤ v < 15.1R7-S516.1 ≤ v < 16.1R7-S516.2 ≤ v < 16.2R2-S1017.1 ≤ v < 17.1R3-S117.2 ≤ v < 17.2R3-S217.3 ≤ v < 17.3R3-S617.4 ≤ v < 17.4R2-S5, 17.4R318.1 ≤ v < 18.1R3-S618.2 ≤ v < 18.2R2-S4, 18.2R318.2X75 ≤ v < 18.2X75-D5018.3 ≤ v < 18.3R1-S5, 18.3R318.4 ≤ v < 18.4R219.1 ≤ v < 19.1R1-S2, 19.1R215.1 15.1 a1 15.1 f1 15.1 f2 15.1 f2-s1 15.1 f2-s2 15.1 f2-s3 15.1 f2-s4 15.1 f3 15.1 f4 15.1 f5 15.1 f6 15.1 f6-s3 15.1 f7 15.1 r1 15.1 r2 15.1 r3 15.1 r4 15.1 r4-s9 15.1 r5 15.1 r6 15.1 r6-s6 15.1 r7-s1 15.1 r7-s2 15.1 r7-s3 15.1 r7-s4 16.1 16.1 r1 16.1 r2 16.1 r3 16.1 r3-s10 16.1 r4 16.1 r5 16.1 r5-s4 16.1 r6 16.1 r6-s1 16.1 r7 16.1 r7-s4 16.2 16.2 r1 16.2 r2 16.2 r2-s1 16.2 r2-s2 16.2 r2-s5 16.2 r2-s6 16.2 r2-s7 16.2 r2-s8 16.2 r2-s9 17.1 17.1 r1 17.1 r2 17.1 r2-s1 17.1 r2-s10 17.1 r2-s2 17.1 r2-s3 17.1 r2-s4 17.1 r2-s5 17.1 r2-s6 17.1 r2-s7 17.1 r3 17.2 17.2 r1-s2 17.2 r1-s4 17.2 r1-s7 17.2 r1-s8 17.2 r2-s6 17.2 r2-s7 17.2 r3-s1 17.3 17.3 r1 17.3 r2 17.3 r2-s1 17.3 r2-s2 17.3 r3 17.3 r3-s1 17.3 r3-s2 17.3 r3-s3 17.3 r3-s4 17.3 r3-s5 17.4 17.4 r1 17.4 r1-s1 17.4 r1-s2 17.4 r1-s4 17.4 r1-s6 17.4 r1-s7 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 18.2X7518.2x7518.2x75 d20 18.2x75 d40 18.3 18.3 r1 18.3 r1-s1 18.3 r1-s2 18.3 r1-s3 18.3 r1-s4 18.4 18.4 r1 18.4 r1-s2 19.1 19.1 r1 19.1 r1-s1

Affected range stops below 15.1R7-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R7-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.2R2-S10, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.2R3-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.3R3-S6, 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 18.2X75-D50, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.3R1-S5, 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-S2, 19.1R2, so it looks safe — our inference, not a vendor statement

juniper-mx10 (environment) · juniper-mx10003 (environment) · juniper-mx10008 (environment) · juniper-mx10016 (environment) · juniper-mx104 (environment) · juniper-mx150 (environment) · juniper-mx2008 (environment) · juniper-mx2010 (environment) · juniper-mx2020 (environment) · juniper-mx204 (environment) · juniper-mx240 (environment) · juniper-mx40 (environment) · juniper-mx480 (environment) · juniper-mx5 (environment) · juniper-mx80 (environment) · juniper-mx960 (environment) · juniper-vmx (environment)

Mx10 · Juniperdevice

80%

All versions

Mx10003 · Juniperdevice

80%

All versions

Mx10008 · Juniperdevice

80%

All versions

Mx10016 · Juniperdevice

80%

All versions