CVE-2017-10603 : Security Advisory and Response

Junos OS: Local XML Injection through CLI command can lead to privilege escalation

Understanding CVE-2017-10603

An XML injection vulnerability in Junos OS CLI allows a locally authenticated user to gain elevated privileges and execute arbitrary commands as the root user.

What is CVE-2017-10603?

The vulnerability affects Juniper Networks Junos OS 15.1X53 versions before 15.1X53-D47 and 15.1 versions before 15.1R3.
It enables a locally authenticated user in Junos OS CLI to exploit the XML injection vulnerability.

The Impact of CVE-2017-10603

CVSS Score: 7 (High Severity)
Attack Complexity: High
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2017-10603

An in-depth look at the technical aspects of the vulnerability.

Vulnerability Description

Locally authenticated users in Junos OS CLI can exploit an XML injection vulnerability to gain elevated privileges and execute arbitrary commands as the root user.

Affected Systems and Versions

Juniper Networks Junos OS 15.1X53 versions before 15.1X53-D47
Juniper Networks Junos OS 15.1 versions before 15.1R3

Exploitation Mechanism

The vulnerability allows for the execution of arbitrary commands as the root user through the CLI.

Mitigation and Prevention

Steps to address and prevent the CVE-2017-10603 vulnerability.

Immediate Steps to Take

Use access lists or firewall filters to restrict CLI access to trusted hosts.
Limit CLI access to highly trusted administrators.

Long-Term Security Practices

Regularly update Junos OS to the patched versions.
Implement strong authentication mechanisms.

Patching and Updates

Update to the fixed software releases: Junos OS 15.1X53-D47, 15.1R3, and later.