On High-End SRX Series devices, in specific configurations and when specific networking events or operator actions occur, an SPC receiving genuine multicast traffic may core. Subsequently, all FPCs in a chassis may reset causing a Denial of Service.

This issue affects both IPv4 and IPv6.

This issue affects:

Juniper Networks Junos OS

12.3X48 version 12.3X48-D80 and later versions prior to 12.3X48-D95 on High-End SRX Series.

This issue does not affect Branch SRX Series devices.

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-2020-1634 .

The following software releases have been updated to resolve this specific issue: 12.3X48-D95, and all subsequent releases.

This issue is being tracked as 1465944 .

Software release Service Packages are available at  http://support.juniper.net  from the "Download Software" links.

There are no viable workarounds for this issue.

​2020-04-08: Initial publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• CVE-2020-1634 at cve.mitre.org