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CVE-2019-0037

Junos OS: jdhcpd crash upon receipt of crafted DHCPv6 solicit message

High7.4EPSS 1.3%
Published
Updated
Reserved
Assigned by
juniper

Description

In a Dynamic Host Configuration Protocol version 6 (DHCPv6) environment, the jdhcpd daemon may crash and restart upon receipt of certain DHCPv6 solicit messages received from a DHCPv6 client. By continuously sending the same crafted packet, an attacker can repeatedly crash the jdhcpd process causing a sustained Denial of Service (DoS) to both IPv4 and IPv6 clients. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1F6-S12, 15.1R7-S3; 15.1X49 versions prior to 15.1X49-D171, 15.1X49-D180; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D496; 16.1 versions prior to 16.1R3-S10, 16.1R7-S4; 16.2 versions prior to 16.2R2-S8; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S3; 17.4 versions prior to 17.4R1-S6, 17.4R2-S3; 18.1 versions prior to 18.1R2-S4, 18.1R3-S2; 18.2 versions prior to 18.2R2; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R1-S2. This issue does not affect Junos OS releases prior to 15.1.

Scores

CVSS scores of CVE-2019-0037, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.0High7.4CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
NVDNVD · Modified3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
1.3% · top 30% of all CVEs (5 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

  • Denial of Service

Affected products

  • Juniper Networks · Junos OS

    • affected 15.1 – < 15.1F6-S12, 15.1R7-S3
    • affected 15.1X49 – < 15.1X49-D171, 15.1X49-D180
    • affected 15.1X53 – < 15.1X53-D236, 15.1X53-D496
    • affected 16.1 – < 16.1R3-S10, 16.1R7-S4
    • affected 16.2 – < 16.2R2-S8
    • affected 17.1 – < 17.1R2-S10, 17.1R3
    • affected 17.2 – < 17.2R1-S8, 17.2R3-S1
    • affected 17.3 – < 17.3R3-S3
    • affected 17.4 – < 17.4R1-S6, 17.4R2-S3
    • affected 18.1 – < 18.1R2-S4, 18.1R3-S2
    • affected 18.2 – < 18.2R2
    • affected 18.2X75 – < 18.2X75-D30
    • affected 18.3 – < 18.3R1-S2
    • unaffected all – < 15.1

What to do

Solution: The following software releases have been updated to resolve this specific issue: Junos OS 15.1F6-S12, 15.1R7-S3, 15.1X49-D171, 15.1X49-D180, 15.1X53-D236, 15.1X53-D496, 16.1R3-S10, 16.1R7-S4, 16.2R2-S8, 17.1R2-S10, 17.1R3, 17.2R1-S8, 17.2R3-S1, 17.3R3-S3, 17.4R1-S6, 17.4R2-S3, 18.1R2-S4, 18.1R3-S2, 18.2R2, 18.2X75-D30, 18.3R1-S2, 18.4R1, and all subsequent releases.

Workaround: No known workaround exists for this issue.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .