Knowledge Search


2019-10 Security Bulletin: 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) (CVE-2019-0067)

  [JSA10966] Show Article Properties

Product Affected:
This issue affects Junos OS 16.1, 16.2, 17.1.
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.

This issue affects Junos OS devices with Multi-Chassis Link Aggregation Group (MC-LAG) enabled.

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

This issue was seen during production usage.

This issue has been assigned CVE-2019-0067.

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.

This issue is being tracked as PR 1261996 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

There are no available workarounds for this issue.
Software Releases, patches and updates are available at
Modification History:
2019-10-09: Initial Publication.
Related Links:
CVSS Score:
6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."