CVE-2017-2341 Explained : Impact and Mitigation

A security vulnerability in Junos OS instances running in a virtualized environment allows unauthorized access, leading to privilege escalation.

Understanding CVE-2017-2341

What is CVE-2017-2341?

This CVE identifies an insufficient authentication vulnerability in Junos OS platforms, enabling unprivileged users to gain unauthorized access to the host operating environment.

The Impact of CVE-2017-2341

The vulnerability has a CVSS base score of 8.8 (High severity) with a low attack complexity and vector being local. It affects various Juniper Networks products and versions.

Technical Details of CVE-2017-2341

Vulnerability Description

The vulnerability allows unprivileged users on Junos OS instances to escalate privileges, impacting platforms like QFX5110, QFX5200, EX4600, and more.

Affected Systems and Versions

Junos OS 14.1X53 prior to 14.1X53-D40 on QFX5110, QFX5200, and more
Junos OS 15.1 prior to 15.1R5 on EX4600
Junos OS 15.1X49 prior to 15.1X49-D70 on vSRX, SRX1500, and more
Junos OS 16.1 prior to 16.1R2 on EX4600, ACX5000 series

Exploitation Mechanism

The vulnerability allows unprivileged users to access the host operating environment, leading to privilege escalation.

Mitigation and Prevention

Immediate Steps to Take

Run Junos OS in FIPS mode to eliminate the vulnerability

Long-Term Security Practices

Regularly update Junos OS to the latest patched versions
Implement strong access controls and monitoring mechanisms
Conduct security audits and assessments periodically

Patching and Updates

Update to the following software releases: Junos OS 14.1X53-D40, 15.1R5, 15.1X49-D70, 16.1R2, and all subsequent releases