What’s Vulnerable › Vulnerabilities

CVE-2019-0064: Junos OS: SRX5000 Series: flowd process crash due to receipt of specific TCP packet

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-10-09 · updated 2026-06-17

Description

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.

Affected products

• Juniper Junos OS: 18.2-r3, 18.4-r2, 19.2-r1

References

• https://kb.juniper.net/JSA10963
• https://kb.juniper.net/JSA10963

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