CVE-2020-26948 : Security Advisory and Response

Emby Server before 4.5.0 is vulnerable to SSRF via the Items/RemoteSearch/Image ImageURL parameter.

Understanding CVE-2020-26948

This CVE identifies a security vulnerability in Emby Server that allows Server-Side Request Forgery (SSRF) through a specific parameter.

What is CVE-2020-26948?

Emby Server versions prior to 4.5.0 are susceptible to SSRF attacks via the ImageURL parameter in the Items/RemoteSearch/Image feature.

The Impact of CVE-2020-26948

This vulnerability could be exploited by an attacker to make unauthorized requests from the server, potentially leading to sensitive data exposure or further attacks.

Technical Details of CVE-2020-26948

Emby Server's vulnerability to SSRF through the ImageURL parameter.

Vulnerability Description

The SSRF vulnerability in Emby Server allows attackers to manipulate the ImageURL parameter to trigger unauthorized server requests.

Affected Systems and Versions

Product: Emby Server
Vendor: Emby
Versions affected: All versions before 4.5.0

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious URLs into the ImageURL parameter, tricking the server into making requests to unintended destinations.

Mitigation and Prevention

Protecting systems from the CVE-2020-26948 vulnerability.

Immediate Steps to Take

Update Emby Server to version 4.5.0 or later to mitigate the SSRF risk.
Implement network controls to restrict outgoing requests from the server.

Long-Term Security Practices

Regularly monitor and audit server logs for suspicious activities.
Educate users and administrators about SSRF risks and best practices.

Patching and Updates

Stay informed about security updates for Emby Server and promptly apply patches to address known vulnerabilities.