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)

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.

Scores

EPSS (exploitation in 30 days)

0.53% · top 55% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• Denial of Service (DoS)

Affected products

• Juniper Networks · Junos OS

  • unaffected unspecified – ≤ 15.1
  • affected 16.1 – < 16.1R6-S2, 16.1R7
  • affected 16.2 – < 16.2R2-S10
  • affected 17.1 – < 17.1R3

What to do

Solution: The following software releases have been updated to resolve this specific issue: 16.1R6-S2, 16.1R7, 16.2R2-S10, 17.1R3, 17.2R1, and all subsequent releases.

Workaround: There are no available workarounds for this issue.

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

References (1)

• https://kb.juniper.net/JSA10966 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

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

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-0067](https://trackcve.app/badge/CVE-2019-0067.svg)](https://trackcve.app/cve/CVE-2019-0067)

Record last updated 16 Sept 2024, 20:12 UTC.