CVE-2019-0064 : Exploit Details and Defense Strategies

CVE-2019-0064 addresses a vulnerability in Juniper Networks Junos OS on SRX5000 Series devices that can lead to a Denial of Service (DoS) situation due to a flowd process crash triggered by specific TCP packets.

Understanding CVE-2019-0064

This CVE entry pertains to a critical issue in Juniper Networks Junos OS affecting SRX5000 Series devices.

What is CVE-2019-0064?

Configuring 'set security zones security-zone <zone> tcp-rst' on SRX5000 Series devices can cause a flowd process crash upon receiving specific TCP packets, potentially resulting in a DoS scenario.

The Impact of CVE-2019-0064

The vulnerability poses a high severity risk with a CVSS base score of 7.5, potentially leading to extended DoS situations on affected devices.

Technical Details of CVE-2019-0064

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw in Junos OS versions 18.2R3, 18.4R2, and 19.2R1 on SRX5000 Series devices can crash the flowd process, initiating a new session and potentially causing a DoS condition.

Affected Systems and Versions

Affected Platforms: SRX 5000 Series
Affected Versions: 18.2R3, 18.4R2, 19.2R1

Exploitation Mechanism

Juniper SIRT has not detected any malicious exploitation of this vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2019-0064 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply the provided software releases: 18.2R3-S1, 18.4R2-S1, 18.4R3, 19.2R1-S1, 19.2R2, 19.3R1, and subsequent versions.

Long-Term Security Practices

Regularly update Junos OS to the latest patched versions.

Patching and Updates

Ensure all devices are running the patched software versions to mitigate the vulnerability.