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CVE Record

CVE-2019-0031: Junos OS: jdhcpd daemon memory consumption Denial of Service when receiving specific IPv6 DHCP packets.

Specific IPv6 DHCP packets received by the jdhcpd daemon will cause a memory resource consumption issue to occur on a Junos OS device using the jdhcpd daemon configured to respond to IPv6 requests. Once started, memory consumption will eventually impact any IPv4 or IPv6 request serviced by the jdhcpd daemon, thus creating a Denial of Service (DoS) condition to clients requesting and not receiving IP addresses. Additionally, some clients which were previously holding IPv6 addresses will not have their IPv6 Identity Association (IA) address and network tables agreed upon by the jdhcpd daemon after the failover event occurs, which leads to more than one interface, and multiple IP addresses, being denied on the client. Affected releases are Juniper Networks Junos OS: 17.4 versions prior to 17.4R2; 18.1 versions prior to 18.1R2.

HighCVSS 7.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

Certain Juniper Junos devices can be made to exhaust memory in the DHCP daemon by receiving specific IPv6 DHCP packets. The result is a denial of service where clients may stop receiving IPv4 or IPv6 addresses. This affects organizations relying on vulnerable Junos devices for DHCP service availability. Exposure is likely limited to Juniper Networks Junos OS 17.4 and 18.1 devices running jdhcpd with IPv6 DHCP response capability enabled on reachable adjacent networks. Prioritize remediation on network devices that provide DHCP for business-critical segments. The business risk is service disruption, not data theft, but DHCP outages can quickly affect user connectivity and operations. Mitigation focus: Upgrade affected Junos OS 17.4 systems to 17.4R2 or later.; Upgrade affected Junos OS 18.1 systems to 18.1R2 or later.; Review Juniper JSA10920 for current vendor guidance and operational workarounds..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2019-0031 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.4 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.4CVSS 3.0HighCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H2.84Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.4High
CVSS 3.0 vector shape for CVE-2019-0031Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Juniper NetworksJunos OS17.4, 18.1Listed
Weakness

CWE details

CWE-400

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Uncontrolled Resource Consumption

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