CVE-2018-0055

Junos OS: jdhcpd process crash during processing of specially crafted DHCPv6 message

MEDIUM

6.5

CVSS Score

Published: October 10, 2018 at 06:00 PM UTC

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

1 product affected across 1 vendorJunos

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.6%

Description

Receipt of a specially crafted DHCPv6 message destined to a Junos OS device configured as a DHCP server in a Broadband Edge (BBE) environment may result in a jdhcpd daemon crash. The daemon automatically restarts without intervention, but a continuous receipt of crafted DHCPv6 packets could leaded to an extended denial of service condition. This issue only affects Junos OS 15.1 and later. Earlier releases are unaffected by this issue. Devices are only vulnerable to the specially crafted DHCPv6 message if DHCP services are configured. Devices not configured to act as a DHCP server are not vulnerable to this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S2; 15.1X49 versions prior to 15.1X49-D160; 15.1X53 versions prior to 15.1X53-D235, 15.1X53-D495; 16.1 versions prior to 16.1R4-S11, 16.1R6-S6, 16.1R7-S2; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S9; 17.2 versions prior to 17.2R2-S6; 17.3 versions prior to 17.3R3-S1; 17.4 versions prior to 17.4R1-S5; 18.1 versions prior to 18.1R2-S3; 18.2 versions prior to 18.2R1-S2; 18.2X75 versions prior to 18.2X75-D20.

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-S215.1X49 ≤ v < 15.1X49-D16015.1X53 ≤ v < 15.1X53-D235, 15.1X53-D49516.1 ≤ v < 16.1R4-S11, 16.1R6-S6, 16.1R7-S216.2 ≤ v < 16.2R2-S717.1 ≤ v < 17.1R2-S917.2 ≤ v < 17.2R2-S617.3 ≤ v < 17.3R3-S117.4 ≤ v < 17.4R1-S518.1 ≤ v < 18.1R2-S318.2 ≤ v < 18.2R1-S218.2X75 ≤ v < 18.2X75-D2015.1 15.1 f2 15.1 f3 15.1 f4 15.1 f5 15.1 f6 15.1 f7 15.1 r1 15.1 r2 15.1 r3 15.1 r6 15.1X49 15.1X5315.1x4915.1x49 d10 15.1x49 d100 15.1x49 d110 15.1x49 d120 15.1x49 d140 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 d9015.1x5315.1x53 d10 15.1x53 d20 15.1x53 d21 15.1x53 d210 15.1x53 d230 15.1x53 d231 15.1x53 d23215.1x53 d23315.1x53 d30 15.1x53 d32 15.1x53 d33 15.1x53 d34 15.1x53 d40 15.1x53 d45 15.1x53 d50 15.1x53 d51 15.1x53 d52 15.1x53 d55 15.1x53 d57 15.1x53 d5815.1x53 d5915.1x53 d60 15.1x53 d62 15.1x53 d63 15.1x53 d64 15.1x53 d65 15.1x53 d6615.1x53 d6716.1 16.1 r1 16.1 r2 16.1 r3 16.2 16.2 r1 17.1 17.1 r1 17.2 17.2 r1 17.3 17.3 r1 17.3 r2 17.4 18.1 18.2 18.2X7518.2x75

Affected range stops below 15.1R7-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1X49-D160, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1X53-D235, 15.1X53-D495, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1R4-S11, 16.1R6-S6, 16.1R7-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.2R2-S7, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.1R2-S9, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.2R2-S6, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.3R3-S1, so it looks safe — our inference, not a vendor statement

Affected range stops below 17.4R1-S5, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.1R2-S3, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2R1-S2, so it looks safe — our inference, not a vendor statement

Affected range stops below 18.2X75-D20, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://kb.juniper.net/JSA10889

References (2)

VDB Entryx_refsource_SECTRACKThird Party Advisory

Source: [email protected]

http://www.securitytracker.com/id/1041856

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://kb.juniper.net/JSA10889

CVSS

6.5MEDIUMjuniper

Attack Vector: ADJACENT_NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-20

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