CVE-2019-11827 : Vulnerability Insights and Analysis

Synology Note Station before version 2.5.3-0863 is affected by a cross-site scripting (XSS) vulnerability that allows remote attackers to inject arbitrary web script or HTML codes.

Understanding CVE-2019-11827

This CVE involves a security vulnerability in Synology Note Station that could be exploited by attackers to execute XSS attacks.

What is CVE-2019-11827?

The object_id parameter in Synology Note Station before version 2.5.3-0863 is susceptible to a cross-site scripting (XSS) vulnerability. This flaw enables malicious actors to inject unauthorized web scripts or HTML content.

The Impact of CVE-2019-11827

The vulnerability has a CVSS base score of 6.5, categorizing it as a medium severity issue. The attack complexity is low, requiring network access and user interaction. While the confidentiality, integrity, and availability impacts are low, the privileges required for exploitation are also low.

Technical Details of CVE-2019-11827

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability in Synology Note Station allows remote attackers to inject arbitrary web script or HTML via the object_id parameter, potentially leading to XSS attacks.

Affected Systems and Versions

Product: Note Station
Vendor: Synology
Vulnerable Version: < 2.5.3-0863 (unspecified/custom version)

Exploitation Mechanism

The vulnerability can be exploited remotely by injecting malicious web scripts or HTML codes through the object_id parameter.

Mitigation and Prevention

To address and prevent exploitation of CVE-2019-11827, follow these steps:

Immediate Steps to Take

Update Synology Note Station to version 2.5.3-0863 or later to mitigate the XSS vulnerability.
Regularly monitor for security advisories and patches from Synology.

Long-Term Security Practices

Implement input validation mechanisms to sanitize user inputs and prevent XSS attacks.
Educate users on safe browsing practices and the risks associated with executing untrusted scripts.

Patching and Updates

Apply security patches promptly to ensure the protection of systems and data from known vulnerabilities.