CVE-2019-0059 : Exploit Details and Defense Strategies

Juniper Networks Junos OS contains a vulnerability that could lead to memory leakage, allowing an attacker to initiate a Denial of Service (DoS) attack by sending specific instructions from a BGP host. This CVE affects various versions of Junos OS.

Understanding CVE-2019-0059

This CVE involves a vulnerability in Juniper Networks Junos OS that can result in a DoS attack through memory leakage.

What is CVE-2019-0059?

Juniper Networks Junos OS is susceptible to a memory leak vulnerability that enables a DoS attack when specific commands are sent from a BGP host to the device.

The Impact of CVE-2019-0059

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Attack Complexity: Low
Availability Impact: High
Privileges Required: None
Scope: Unchanged
User Interaction: None
This vulnerability does not impact confidentiality or integrity.

Technical Details of CVE-2019-0059

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in Juniper Networks Junos OS can lead to a memory leak, enabling a DoS attack when specific BGP commands are sent to the device.

Affected Systems and Versions

Juniper Networks Junos OS 18.1 versions up to 18.1R2-S4, 18.1R3-S1
Juniper Networks Junos OS 18.1X75 all versions
Versions prior to 18.1R1 are not impacted.

Exploitation Mechanism

Juniper SIRT has not detected any malicious exploitation related to this vulnerability.

Mitigation and Prevention

Protecting systems from CVE-2019-0059 involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Update to the following software releases: 18.1R2-S4, 18.1R3-S1, 18.2X75-D5, 18.2R1, and subsequent releases.

Long-Term Security Practices

Regularly monitor and update Junos OS to the latest versions.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Apply the provided software releases to address the vulnerability.