CVE-2019-0006 Explained : Impact and Mitigation
Learn about CVE-2019-0006, a critical vulnerability in Juniper Networks Junos OS affecting Virtual Chassis Platforms. Find out the impact, affected systems, exploitation details, and mitigation steps.
An uninitialized function pointer deference vulnerability in the Packet Forwarding Engine manager (fxpc) on Juniper Networks Junos OS devices in a Virtual Chassis configuration can lead to a crash of the fxpc daemon or potential remote code execution.
Understanding CVE-2019-0006
This CVE involves a specific HTTP packet triggering a critical vulnerability in the Packet Forwarding Engine manager on Juniper Networks devices.
What is CVE-2019-0006?
This CVE identifies a flaw in Junos OS that can be exploited by a crafted HTTP packet, potentially causing the fxpc daemon to crash or allowing remote code execution.
The Impact of CVE-2019-0006
The vulnerability has a CVSS base score of 9.8 (Critical) with high impacts on confidentiality, integrity, and availability. It requires no privileges and has a low attack complexity.
Technical Details of CVE-2019-0006
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from an uninitialized function pointer deference issue in the fxpc daemon, triggered by a specific HTTP packet.
Affected Systems and Versions
- Platforms: EX, QFX, and MX Virtual Chassis Platforms
- Affected Versions:
- Junos OS 14.1X53 versions earlier than 14.1X53-D47 on EX and QFX Virtual Chassis Platforms
- Junos OS 15.1 versions prior to 15.1R7-S3 on all Virtual Chassis Platforms
- Junos OS 15.1X53 versions earlier than 15.1X53-D50 on EX and QFX Virtual Chassis Platforms
Exploitation Mechanism
The vulnerability can be exploited by sending a crafted HTTP packet to the affected device, triggering the fxpc daemon crash or enabling remote code execution.
Mitigation and Prevention
Effective measures to address and prevent the CVE-2019-0006 vulnerability.
Immediate Steps to Take
- Apply the provided Junos OS updates: 14.1X53-D47, 15.1R7-S3, 16.1R1, and subsequent releases
Long-Term Security Practices
- Regularly update and patch Junos OS to the latest versions
- Implement network segmentation and access controls to limit exposure
Patching and Updates
Ensure timely installation of Junos OS updates to mitigate the vulnerability.