CVE-2017-16773 : Security Advisory and Response

A vulnerability related to improper authorization has been identified in the Highlight Preview feature of Synology Universal Search prior to version 1.0.5-0135. This CVE was published on July 5, 2018, with a CVSS base score of 6.5.

Understanding CVE-2017-16773

This CVE involves an improper authorization vulnerability in Synology Universal Search, allowing remote authenticated users to bypass permission checks for directories in POSIX mode.

What is CVE-2017-16773?

The CVE-2017-16773 vulnerability in Synology Universal Search before version 1.0.5-0135 enables remote authenticated users to circumvent permission checks for directories in POSIX mode.

The Impact of CVE-2017-16773

The impact of this vulnerability is rated as MEDIUM severity with a CVSS base score of 6.5. It poses a high confidentiality impact but no integrity or availability impact.

Technical Details of CVE-2017-16773

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability allows remote authenticated users to bypass permission checks for directories in POSIX mode within Synology Universal Search.

Affected Systems and Versions

Product: Universal Search
Vendor: Synology
Versions Affected: Less than 1.0.5-0135 (unspecified version type)

Exploitation Mechanism

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged

Mitigation and Prevention

To address CVE-2017-16773, follow these mitigation strategies:

Immediate Steps to Take

Upgrade Synology Universal Search to version 1.0.5-0135 or higher.
Monitor and restrict access to sensitive directories.

Long-Term Security Practices

Regularly review and update access control policies.
Conduct security training for users on proper directory access.

Patching and Updates

Apply security patches and updates provided by Synology.