title: Junos OS: jdhcpd crash upon receipt of crafted DHCPv6 solicit message
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.
problem types: Denial of Service
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1F6-S12, 15.1R7-S3, status: affected, version: 15.1, versionType: custom
lessThan: 15.1X49-D171, 15.1X49-D180, status: affected, version: 15.1X49, versionType: custom
lessThan: 15.1X53-D236, 15.1X53-D496, status: affected, version: 15.1X53, versionType: custom
lessThan: 16.1R3-S10, 16.1R7-S4, status: affected, version: 16.1, versionType: custom
lessThan: 16.2R2-S8, status: affected, version: 16.2, versionType: custom
lessThan: 17.1R2-S10, 17.1R3, status: affected, version: 17.1, versionType: custom
lessThan: 17.2R1-S8, 17.2R3-S1, status: affected, version: 17.2, versionType: custom
lessThan: 17.3R3-S3, status: affected, version: 17.3, versionType: custom
lessThan: 17.4R1-S6, 17.4R2-S3, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R2-S4, 18.1R3-S2, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R2, status: affected, version: 18.2, versionType: custom
lessThan: 18.2X75-D30, status: affected, version: 18.2X75, versionType: custom
lessThan: 18.3R1-S2, status: affected, version: 18.3, versionType: custom
lessThan: 15.1, status: unaffected, version: all, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 7.4
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.0
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: 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.
workarounds: No known workaround exists for this issue.