On SRX5000 Series devices, if ' set security zones security-zone < zone > tcp-rst ' is configured, the flowd process may crash when a specific TCP packet is received by the device and triggers a new session. The process restarts automatically. However, receipt of a constant stream of these TCP packets may result in an extended Denial of Service (DoS) condition on the device.

This issue affects Juniper Networks Junos OS:

• 18.2R3 on SRX 5000 Series;
• 18.4R2 on SRX 5000 Series;
• 19.2R1 on SRX 5000 Series.

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

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2019-0064 .
 

The following software releases have been updated to resolve this specific issue: 18.2R3-S1, 18.4R2-S1, 18.4R3, 19.2R1-S1, 19.2R2, 19.3R1, and all subsequent releases.

This issue is being tracked as PR 1445480 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).
 

Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/ .
 

There are no viable workarounds for this issue.
 

• 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-2019-0064 at cve.mitre.org