CVE-2019-0052 : Vulnerability Insights and Analysis

This CVE-2019-0052 article provides insights into a vulnerability affecting Juniper Networks' Junos OS on SRX Series gateways.

Understanding CVE-2019-0052

CVE-2019-0052 is a vulnerability that can cause the srxpfe process to crash on SRX Series gateways when processing specific fragmented HTTP packets.

What is CVE-2019-0052?

The vulnerability occurs due to misinterpretation of a fragmented HTTP packet as a regular TCP packet by the UTM module, leading to a processor crash.

The Impact of CVE-2019-0052

The vulnerability has a CVSS base score of 7.5 (High severity) with a high impact on availability but no impact on confidentiality or integrity.

Technical Details of CVE-2019-0052

CVE-2019-0052 affects various versions of Junos OS on SRX Series gateways.

Vulnerability Description

The srxpfe process crashes when processing specific HTTP packets due to misinterpretation by the UTM module.

Affected Systems and Versions

Junos OS 12.3X48 versions prior to 12.3X48-D85
Junos OS 15.1X49 versions prior to 15.1X49-D181 and 15.1X49-D190
Junos OS 17.3
Junos OS 17.4 versions prior to 17.4R1-S8, 17.4R2-S5, 17.4R3
Junos OS 18.1 versions prior to 18.1R3-S6
Junos OS 18.2 versions prior to 18.2R2-S1, 18.2R3
Junos OS 18.3 versions prior to 18.3R1-S2, 18.3R2
Junos OS 18.4 versions prior to 18.4R1-S1, 18.4R2

Exploitation Mechanism

The vulnerability has a low attack complexity and requires no user interaction, with a network-based attack vector.

Mitigation and Prevention

To address CVE-2019-0052, follow these steps:

Immediate Steps to Take

Update to the fixed software releases provided by Juniper Networks.
Enable HTTP reassembly in the web-filtering configuration.

Long-Term Security Practices

Regularly update Junos OS to the latest versions.
Implement security best practices for network devices.

Patching and Updates

Juniper Networks has released updated software versions to resolve the vulnerability.