CVE-2019-0067: Junos OS: Kernel crash (vmcore) upon receipt of a specific link-local IPv6 packet on devices configured with Multi-Chassis Link Aggregation Group (MC-LAG)

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-10-09 · updated 2026-06-17

Description

Receipt of a specific link-local IPv6 packet destined to the RE may cause the system to crash and restart (vmcore). By continuously sending a specially crafted IPv6 packet, an attacker can repeatedly crash the system causing a prolonged Denial of Service (DoS). This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R6-S2, 16.1R7; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R3. This issue does not affect Juniper Networks Junos OS version 15.1 and prior versions.

Affected products

Juniper Junos OS: 16.1, 16.1-r1, 16.1-r2, 16.1-r3, 16.1-r3-s10, 16.1-r3-s11 (+23)

References

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