CVE-2017-16300 : What You Need to Know

CVE-2017-16300 pertains to buffer overflow vulnerabilities in the Insteon Hub's PubNub message handler. Attackers can exploit these vulnerabilities by sending specially crafted commands through the PubNub service, leading to a stack-based buffer overflow.

Understanding CVE-2017-16300

This CVE involves multiple buffer overflow vulnerabilities in the Insteon Hub's PubNub message handler for the "cc" channel.

What is CVE-2017-16300?

The vulnerabilities in the Insteon Hub's PubNub message handler can be exploited by sending specific commands through the PubNub service, resulting in a stack-based buffer overflow.

The Impact of CVE-2017-16300

The vulnerabilities can be triggered by authenticated HTTP requests, potentially allowing attackers to overwrite arbitrary data through a buffer overflow.

Technical Details of CVE-2017-16300

The following are technical details of the CVE.

Vulnerability Description

The vulnerabilities are stack-based buffer overflows in the Insteon Hub's PubNub message handler.

Affected Systems and Versions

Vendor: Insteon
Product: Hub
Affected Version: Not specified

Exploitation Mechanism

Attackers exploit the vulnerabilities by sending specially crafted commands through the PubNub service, triggering a stack-based buffer overflow.
Specifically, the cmd sn_ex function at memory address 0x9d01ac74 is vulnerable, where the value assigned to the

id

key is copied to a buffer at address

$sp+0x290

using the

strcpy

function.
The buffer has a size of 32 bytes, allowing any input longer than that to trigger a buffer overflow.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2017-16300.

Immediate Steps to Take

Disable remote access to the Insteon Hub if not required.
Regularly monitor for any unusual activity on the PubNub service.

Long-Term Security Practices

Implement network segmentation to isolate critical devices.
Keep systems and software up to date to patch known vulnerabilities.

Patching and Updates

Apply patches and updates provided by Insteon to address the buffer overflow vulnerabilities.