CVE-2017-6719 : Exploit Details and Defense Strategies

Cisco IOS XR Software has a vulnerability in its Command Line Interface (CLI) that allows an authenticated attacker to execute arbitrary commands with root privileges. This weakness, known as Command Injection, affects specific versions of the software.

Understanding CVE-2017-6719

This CVE entry details a local command injection vulnerability in Cisco IOS XR Software, potentially exploitable by an authenticated attacker.

What is CVE-2017-6719?

The vulnerability in Cisco IOS XR Software's CLI enables an authenticated attacker to run arbitrary commands on the host operating system with root privileges, posing a significant security risk.

The Impact of CVE-2017-6719

The vulnerability, also referred to as Command Injection, could be exploited by an attacker physically present, leading to unauthorized command execution with elevated privileges.

Technical Details of CVE-2017-6719

This section provides specific technical details regarding the vulnerability.

Vulnerability Description

The weakness in the CLI of Cisco IOS XR Software allows an authenticated attacker to execute arbitrary commands on the host OS with root privileges, potentially leading to unauthorized system access.

Affected Systems and Versions

Product: Cisco IOS XR
Affected Versions: 6.2.1.BASE
Fixed Versions: 6.2.1.28i.BASE, 6.2.1.22i.BASE, 6.1.32.8i.BASE, 6.1.31.3i.BASE, 6.1.3.10i.BASE

Exploitation Mechanism

The vulnerability can be exploited by an authenticated attacker who is physically present, leveraging the weakness in the CLI to execute unauthorized commands with elevated privileges.

Mitigation and Prevention

Steps to address and prevent the exploitation of CVE-2017-6719.

Immediate Steps to Take

Apply the provided fixed versions to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.
Restrict physical access to devices running the affected software.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement strong authentication mechanisms to control access to critical systems.

Patching and Updates

Install the fixed versions (6.2.1.28i.BASE, 6.2.1.22i.BASE, 6.1.32.8i.BASE, 6.1.31.3i.BASE, 6.1.3.10i.BASE) provided by Cisco to address the vulnerability.