CVE-2017-3825 : What You Need to Know

A flaw in the ICMP ingress packet processing of Cisco TelePresence Collaboration Endpoint (CE) Software could lead to a denial of service (DoS) attack.

Understanding CVE-2017-3825

This CVE involves a vulnerability in Cisco TelePresence software that could allow an unauthorized remote attacker to cause a DoS situation.

What is CVE-2017-3825?

The vulnerability stems from incomplete validation of input for the size of an ICMP packet, enabling an attacker to send a crafted packet to the endpoint, leading to unexpected reloads and potential DoS.

The Impact of CVE-2017-3825

Unauthorized remote attackers could cause TelePresence endpoints to reload unexpectedly, resulting in a DoS condition.
Dropped calls and service interruptions may occur due to successful exploitation of the vulnerability.

Technical Details of CVE-2017-3825

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw lies in the incomplete validation of input for the size of an ICMP packet received.
Attackers can exploit this by sending a carefully crafted ICMP packet to the local IP address of the targeted endpoint.

Affected Systems and Versions

Cisco TelePresence products running software releases CE8.1.1, CE8.2.0, CE8.2.1, CE8.2.2, CE 8.3.0, or CE8.3.1 are affected.
Products include Spark Room OS, TelePresence DX Series, TelePresence MX Series, TelePresence SX Quick Set Series, TelePresence SX Series.

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a crafted ICMP packet to the local IP address of the targeted endpoint.

Mitigation and Prevention

Steps to address and prevent the CVE.

Immediate Steps to Take

Apply vendor-provided patches and updates promptly.
Implement network segmentation to limit exposure to potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

Regularly check for security advisories and updates from Cisco.
Ensure all TelePresence software is up to date to mitigate the vulnerability.