CVE-2017-6796 Explained : Impact and Mitigation

A vulnerability in the USB-modem code of Cisco IOS XE Software on Cisco ASR 920 Series Aggregation Services Routers could allow a local attacker to inject and execute arbitrary commands on the affected device's operating system.

Understanding CVE-2017-6796

This CVE involves a weakness in the USB-modem code of Cisco IOS XE Software on Cisco ASR 920 Series Aggregation Services Routers, potentially enabling a local attacker to execute arbitrary commands.

What is CVE-2017-6796?

The vulnerability arises from inadequate validation of input for the platform USB modem command in the Command Line Interface (CLI) within the affected software.

The Impact of CVE-2017-6796

An authenticated local attacker could inject and execute arbitrary commands on the device's operating system.
Exploiting this vulnerability involves modifying the platform USB modem command within the CLI on the affected device.

Technical Details of CVE-2017-6796

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to inject and execute arbitrary commands on the underlying operating system.

Affected Systems and Versions

Product: Cisco IOS XE
Version: Cisco IOS XE

Exploitation Mechanism

The vulnerability is exploited by modifying the platform USB modem command within the CLI on the affected device.

Mitigation and Prevention

Steps to address and prevent the CVE-2017-6796 vulnerability.

Immediate Steps to Take

Apply vendor patches and updates promptly.
Monitor network traffic for signs of exploitation.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Implement strong authentication mechanisms.
Conduct regular security audits and assessments.

Patching and Updates

Cisco has released patches to address this vulnerability. Ensure all affected systems are updated with the latest patches.