CVE-2019-0038 : Security Advisory and Response

A denial of service vulnerability affecting Junos OS on SRX340/SRX345 devices due to crafted packets targeting the management interface.

Understanding CVE-2019-0038

Crafted packets aimed at the management interface of SRX340/SRX345 devices can lead to a denial of service situation.

What is CVE-2019-0038?

The vulnerability arises from buffer space saturation caused by specially crafted packets directed at the management interface (fxp0) of SRX340 and SRX345 services gateways.

The Impact of CVE-2019-0038

The vulnerability can result in a denial of service (DoS) situation on affected devices.
Only SRX340 and SRX345 services gateways are impacted.

Technical Details of CVE-2019-0038

Crafted packets targeting the fxp0 management interface can exhaust buffer space, leading to a DoS condition.

Vulnerability Description

Affected platforms: SRX340/SRX345
Affected product: Junos OS

Affected Systems and Versions

Versions impacted: 15.1X49-D160, 17.3, 17.4R2-S3, 17.4R3, 18.1R3-S1, 18.2R2, 18.3R1-S2, 18.3R2
Unaffected versions: Releases prior to 15.1X49 on any platform

Exploitation Mechanism

No known malicious exploitation reported
Administrators can monitor buffer space utilization to detect the issue

Mitigation and Prevention

Immediate Steps to Take

Update to the following software releases: 15.1X49-D160, 17.4R2-S3, 17.4R3, 18.1R3-S1, 18.2R2, 18.3R1-S2, 18.3R2, 18.4R1, or later Long-Term Security Practices
Regularly monitor buffer space utilization
Stay informed about security advisories and updates
Implement network segmentation and access controls

Patching and Updates

Ensure all affected systems are updated to the patched software versions