CVE-2017-10602 : Vulnerability Insights and Analysis

A buffer overflow vulnerability in Junos OS CLI may allow a local authenticated user with read-only privileges and access to Junos CLI to execute code with root privileges. This CVE affects various Juniper Networks Junos OS versions across different platforms.

Understanding CVE-2017-10602

This CVE identifies a critical vulnerability in Junos OS CLI that could lead to unauthorized code execution with elevated privileges.

What is CVE-2017-10602?

CVE-2017-10602 is a buffer overflow vulnerability in Junos OS CLI that could be exploited by a local user with read-only access to the CLI, potentially resulting in the execution of arbitrary code as a root user.

The Impact of CVE-2017-10602

The vulnerability poses a high risk with a CVSS base score of 7, indicating a significant impact on confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2017-10602

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability allows a local user with limited privileges to trigger a buffer overflow in Junos OS CLI, leading to potential code execution with elevated permissions.

Affected Systems and Versions

Junos OS 14.1X53 versions before 14.1X53-D46 on various platforms
Junos OS 14.2 versions before 14.2R4-S9, 14.2R6
Junos OS 15.1 versions before 15.1F5, 15.1R3
Junos OS 15.1X49 versions before 15.1X49-D40 on SRX Series
Junos OS 15.1X53 versions before 15.1X53-D47 on NFX150, NFX250
Junos OS 15.1X53 versions before 15.1X53-D65 on QFX10000 Series
Junos OS 15.1X53 versions before 15.1X53-D233 on QFX5110, QFX5200

Exploitation Mechanism

The vulnerability can be exploited by a local user with read-only access to the Junos CLI, allowing them to execute malicious code with root privileges.

Mitigation and Prevention

Protecting systems from CVE-2017-10602 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply the provided software updates to address the vulnerability
Implement access lists or firewall filters to restrict CLI access to trusted hosts

Long-Term Security Practices

Regularly update Junos OS to the latest patched versions
Enforce the principle of least privilege to limit user access rights

Patching and Updates

Ensure that the following software releases are installed to mitigate the vulnerability: 14.1X53-D46, 14.1X53-D130*, 14.2R4-S9, 14.2R6, 15.1F5, 15.1R3, 15.1X49-D40, 15.1X53-D47, 15.1X53-D65, 15.1X53-D233, 16.1R1, and subsequent releases.

*Note: Release 14.1X53-D130 is pending publication and tracked as PR 1149652.