CVE-2017-3853 : Security Advisory and Response

A security flaw has been discovered in the Data-in-Motion (DMo) process within the Cisco IOx application environment, potentially allowing unauthorized remote attackers to trigger a stack overflow. This could lead to the execution of remote code with root privileges in the virtual instance on the affected device. The vulnerability stems from inadequate boundary checks in the DMo process, affecting specific Cisco 800 Series Industrial Integrated Services Routers.

Understanding CVE-2017-3853

This CVE identifies a vulnerability in the Cisco IOx application environment that could be exploited by attackers to execute remote code with root privileges.

What is CVE-2017-3853?

The vulnerability in the Data-in-Motion (DMo) process of Cisco IOx could be exploited by sending crafted packets to trigger a stack overflow, enabling remote code execution with root privileges in the virtual instance.

The Impact of CVE-2017-3853

Successful exploitation allows attackers to execute remote code with root privileges in the virtual instance running on the affected device.
The vulnerability affects the Cisco 800 Series Industrial Integrated Services Routers, specifically the Cisco IR809 and Cisco IR829 models.

Technical Details of CVE-2017-3853

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from insufficient bounds checking in the DMo process, allowing attackers to exploit it by sending crafted packets for evaluation.

Affected Systems and Versions

Affected devices include the Cisco 800 Series Industrial Integrated Services Routers, particularly the Cisco IR809 and Cisco IR829 models.
Vulnerable versions of Cisco IOx are Releases 1.0.0.0 and 1.1.0.0.

Exploitation Mechanism

Attackers exploit the vulnerability by sending specifically crafted packets to trigger a stack overflow in the DMo process.
This enables the execution of remote code with root privileges in the virtual instance.

Mitigation and Prevention

Protecting systems from CVE-2017-3853 involves immediate steps and long-term security practices.

Immediate Steps to Take

Apply patches provided by Cisco to address the vulnerability.
Monitor network traffic for any signs of exploitation.
Implement strong firewall rules to restrict unauthorized access.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent vulnerabilities.
Conduct security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Cisco has released patches to mitigate the vulnerability. Ensure timely installation of these patches to secure the affected systems.