CVE-2020-12695 : What You Need to Know

The Open Connectivity Foundation UPnP specification before 2020-04-17 allows the acceptance of a subscription request with a delivery URL on a different network segment than the event-subscription URL, known as the CallStranger issue.

Understanding CVE-2020-12695

This CVE relates to a vulnerability in the UPnP specification that could have significant implications for affected systems.

What is CVE-2020-12695?

The vulnerability in the UPnP specification allows the acceptance of subscription requests with delivery URLs on different network segments than the event-subscription URL.

The Impact of CVE-2020-12695

The CallStranger issue could potentially lead to security breaches and unauthorized access to systems utilizing the UPnP protocol.

Technical Details of CVE-2020-12695

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows for the acceptance of subscription requests with delivery URLs on separate network segments from the event-subscription URL.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions before 2020-04-17

Exploitation Mechanism

Attackers can exploit this vulnerability by sending subscription requests with malicious delivery URLs, potentially leading to network compromise.

Mitigation and Prevention

Protecting systems from CVE-2020-12695 is crucial to prevent security incidents.

Immediate Steps to Take

Disable UPnP services if not essential for network operations
Implement network segmentation to limit the impact of potential attacks
Monitor network traffic for any suspicious UPnP activity

Long-Term Security Practices

Regularly update and patch UPnP-enabled devices
Conduct security assessments to identify and address vulnerabilities

Patching and Updates

Apply patches provided by vendors to address the CallStranger vulnerability in UPnP